Can i use 75w140 instead of 80w90. Is 75W140 better than 80W90? Q.
Is 75W140 better than 80W90? Q. well, they must have the senses of a superman. Tow a lot, tow heavy,tow in hot weather, use a 140. As you can see from the attached images the owners manual has been updated. But if you live in a really cold region, 80w 90 is the way to go. Most any synthetic 75w-140 will work for the rear, but I thought the front used 80w-90. ) My area has winters that typically get down as low as -5 F or so, a few nights. There won’t be any noticeable difference between the two as long as they are entirely synthetic. Feb 1, 2018 · If you want to go with 75w-90, I would highly recommend Motul Gear 300. For example, both of them have viscosity differences, which you can check by yourself. If you want synthetic 80W-90, I know Amsoil makes it. This means that 80w90 gear oil will provide more protection for your gears, but it will also make your vehicle’s engine work harder. Sep 26, 2007 · Oil & Lubrication - 75W-90 vs. Dec 5, 2002 · Our Kia Sportage rear and front differentials call for 80W-90 or a straight 90 weight. Compatible vehicles. Dec 30, 2008 · So it would call for a 80W90 instead. If owner works vehicle, power mods, tows/plows, hauls. 005 mileage increase for the 85. About 6cm under level. Aug 20, 2003 · In the past I have used 75w-90. Feb 1, 2010 · You will need 2-1/2 quarts for the rear and 2 quarts for the front. The change is not so significant to notice. Below 40ºC-100ºF the viscosity of a 75w140 oil is far superior than 75w90 oil althought both are 75w (it is strange for me) Grafico viscosidades: Diferenciales Apr 7, 2022 · As I mentioned above, 75W140 is suitable for vehicles with high horsepower. Complex Answer: Install a diff temp gauge. If I use one oil I lose the warranty on the lsd, and if I use the other oil I lose the warranty on the rear. It's kinda weird if you ask me, or they just had a supply of 80w-90 they had to use up before switching both front & rear diffs to the same gear oil. Here is my question, though. However, it is good to consider the conditions under which you will be using them. Synthetic gear oils performed better than minerals but that comes with a slightly higher cost. Castrol SAF-XJ would be my recommendation. Citation This page can be cited as The Engineering ToolBox (2008). Models equipped with Trac-Lok require an additive. the 634 is currently in a 30 and a 44, I have a pair of 30's So, it is undoubtedly worth it to use 75w90 gear oil instead of 80w90. If you really want to go thicker, you'll want the best stuff you can get so that your temps stay low (thick oil doesn't cool as efficiently). May 18, 2009 · Use the 80w-90. In this cross reference tool, PSC offers this Mobil SHC 634 and/or equivalent products of the similar quality and performance. 1999. However, you might need to shorten the draining interval to maximize the life of the mechanical components. Early synthetics 25 or so years ago got a bad rap for seal leaks but that is not the case with modern synthetics and additive packages. Because it provides more protection. Knowing the above would be my choices and I posted what I use. The reasoning behind a synthetic instead of dino is dino 140s tend to be 85W140, which might not Jun 5, 2003 · Depends how it's used. Can I use 80w90 instead of 75w80? Yes, it is excellent to use 75w90 instead of 80w90 gear oil. Jun 19, 2017 · Yes, Ford switched over the rear diff fluid to 75w-85 in 2015, but kept 80w-90 for the front until 2017 where they use 75w-85 for both the front & rear diffs now. Then Ford issued a TSB to use 75W140, and I do. The 75W90 and 80w90 are synthetic oils featuring the modern additive system. May 30, 2007 · The better quality 80W-90 gear lubes are ranging anywhere from $9 to $14 a quart! I need eight quarts! Whew! Rural King has Mystik 85W-140 in stock for only about $2. I used 80w140 (9$ a liter in a 20L pail) for my ram 1500. Northern Vadoesn't need a 75w140, and I don't remember F-150 diff's falling out all over the place. Prior to that, its primary function was a tow vehicle for my camper. I don't know that it's ever been proven whether the oil caused the problems or if something else changed, like a different manufacturer or something, but it seemed that when Ford went to the 75W140 a lot of bearing problems showed up. Its the higher end of 80W. Max-Gear is recommended for use in truck, motor home / RV, and automotive front or rear differentials, manual transmissions, and lower gear units of marine engines that specify the use of an API GL-5 or GL-4 fluid. 0 AWD Jun 6, 2015 · And even if towing, required stronger film oil, then I think that probably the 75W-90, at 40-50C is not sufficient when the design asks for 80W-90 viscosity. I changed my front differential to synthetic, but didn't get any mileage increase. In principal the 140 will increase fuel consumption, but only marginally. 80W90 is a heavier oil than 75W90 and is designed for use in high-temperature applications. Quick Answer: Here’s my short answer, in case you don’t have time to read the entire article – “ Yes, you can use 80W90 instead of 75W90. If you don't, the 80W-90 (or 75W-90, 70W-80 etc. Will full synthetic work better? I’m only at 26,000 miles but I did quite a bit of water crossings recently. 75w140 – Which One Should You Pick? Was gonna buy 80W-90 gear oil for my 2007 RAV4's Transfer Case and Rear Differential. The 140 will handle higher temps better. Oct 21, 2004 · Not only does your rear diff require 75W140, it requires FULL Synthetic. Is It OK To Use 75W90 Instead Of 80W90? Yes, it is absolutely fine to use 75w90 instead of 80w90 gear oil. Now I can't remember if I used the older 75w-140 or new formulation 80w-140. 2. To me, the only possible downside you might see with 75w140 would be fuel economy loss by a tiny fraction of a MPG. My whimpy little Ranger pickup calls for 75w-90 as well but put in the 80w-90 instead. May 15, 2016 · However, Harley does offer you can use a motor oil in the Primary and Transmission as well, they recommend if you do, use the HD brand Syn 3 20/50, knowing that, you can use any 20/50 engine oil in the transmission and primary. 5, F350, Lariat, 4x4, SRW, SWB, Off Road Package, Performance chipped, Wicked Wheel, K&N Filter, Ranch Hand Front Grill, 2004 Lariat Leather front seats, spray-in bed liner, 242K miles, more mods to come. The standard uses include use in heavy-duty trucks, off-road vehicles, and towing trucks. 85W140 oil is a heavier weight oil that can be used in place of 75W140 oil. Can I use 80w90 on the rear or is it a bad thing. Dec 28, 2023 · Me they never used to see ford rear end issues until they dropped from 75w140 down to 80w90 (or whatever the latest stuff is), in 2015 or so. Both are high-quality oils that can keep your gears running smoothly. Jan 4, 2020 · For the front should i use 80w-90 or 75-140? I have 80W-90 premium non-synthetic. However, there may be cases where using 75w90 instead of 80w90 is acceptable if the manufacturer allows for a range of viscosity grades. My question is whether I should recommend the customer use an EP-00 grease with a base oil viscosity of 190-220 as a replacement for the ISO VG 220 gear oil. Mobile 1 4T 20/50 I am sure would be a fine choice. Nevertheless, 75W140 is more frequently used for heavier-duty purposes or heavier usage because of its higher viscosity at higher temperatures. It seems to make more noise when it gets contaminated with grease. You can use Mobil 1, Amsoil, Royal Purple or the super expensive Motorcraft. Thus, using 80w 90 will be good enough for your vehicle. It is also essential to consult your mechanic before you mix. The front takes 80w-90 dino, but you can use 75w90 synthetic. The whining hasn't got worse since I bought it 20k miles ago. Or just stick with 80W-90, not go for the thinner (at 40C) 75W-90. Can I use 75w140 and 75w90 interchangeably? You can swap them if driving in icy weather, as both have the same low-temperature stability Oct 9, 2007 · Mobil 1 synthetic is the best you can buy, IMHO. Jul 20, 2007 · What is the difference between 80w90 gear oil and 85w90 gear oil? I know that the 85w90 was the standard gear lube for umpteen years. Mar 18, 2014 · It seems that I'm nearly out of bar lube oil. So, if you have a recent Mustang, you should use the 75W140 gear oil in the gearbox. Q: My lubricant supplier says that if we switch to a synthetic, we can expect to see a 10 percent reduction in energy consumption. It's an Australian spec'd oil that we use to use in the RWD stuff like Falcon & Transit. The 30db comment is no joke. If you’re wondering whether you can use 85W140 oil instead of 80W90, the answer is yes. Synthetic 75w90 is between $12 and $15+ a quart. I have a spare quart of Mobil-1 75W140 left over from my truck days. 1 Oct 5, 2009 · I've done a lot of searching to try to find the correct fluid to use in the rear differential in my 1997 F350 with the Ford 10. Is too thick of a rear diff Aug 20, 2018 · 80w-90 instead of 75w-85 gear oil? Jump to Latest 7K views 3 replies 2 participants last post by jjchambers Aug 21, 2018 It is important to follow the gearbox or diff manufacturers recommendations and use the correct GL rating. Owners manual calls for Hypoid GL-5 gear oil. I have all the manuals for my '86, and here is what it calls out: Ford Spec ESA-M2C154-A , which was a 80W90 oil (-15F-100F). Additionally, I change those fluids every other service. I will be selling this truck/camper combo to a fellow CC member in the near future, and want to get the truck as prepped as it possibly can be (he will be flying in and making the 1,300 mile drive home) Jan 22, 2007 · Hi. I use 75w90 in all my rear diffs unless it calls for 75w140. If they made a 75w500 I would try it. Jun 6, 2022 · What is the difference between 75W-90 gear oil and 80W-90 gear oil? The difference between 75w80 and 80w90 gear oil is that the latter has a higher viscosity. 00 a liter and the Can I use 75w90 instead of 75w85? Yes, you can. Dec 24, 2023 · Can I use 10w40 instead of 5w20? Yes, It is possible to use 10W40 oil instead of 5W20, but it is important to let the engine cool down before making the switch Jun 24, 2003 · 1997 - 2003 F150 - Rear Diff Fluid 75w140 VS 75w90 - Ok I'm about to change the rear diff plate on my 1999 ford f150 xl truck. You can also use fully synthetic transmission gear oil which often provides increased benefits at a cost. Therefore, if you will be experiencing either of the extreme weather condition, 80w90 is the way to go. Joined Jul 14, 2015 Messages 5 Location Blandford MA Tractor Dec 21, 2010 · I have been using it as a DD for the past few months. Nov 21, 2019 · Personally I use synthetic 75W140 though because I don't like walking. If I remember correctly, the designation MT-1 means that the GL-5 lube SHOULD be OK where a GL-4 lube is specified. Posted the table to make others Jul 14, 2019 · It seems like everyone here, myself included, use synthetic 75W-90 where conventional 80W-90 is specified. We are talking a bunch of heavy gears in the rear end so if anybody notices any differences from a 75w to an 80w. What Happens If You Use 75w85 Instead of 75w90? Mar 17, 2022 · You can run into problems if you mix oils with different viscosity ratings, but it should not be an issue since they have the same rating here. Simple Answer: Any synthetic 75W140 or 75W110. Dec 18, 2005 · On both sides of the case, a metal stamped plate says to use only 75W140 synethic. Its used mostly for short trips around town. ) is fine. The rear diff in my car specs an 80W90,and I was just curious about the difference between those two weight. Aug 11, 2005 · I never bothered with 80w90 and always substituted 75w90. Jan 24, 2012 · The main difference between 80w90 and 75w90 is the synthetic tag. It looks like most places sell the Motorcraft stuff for $18-20/quart, so just buy it somewhere else other than the dealership. See full list on rightforauto. It's Sunday so Ford is out of the question. I had several bottles of 75W140 on the shelf and ran a load of it in my rear diff for 30,000 miles or so. I wonder why they made the jump to 75w140 instead of just calling for a synthetic GL-5? That would have allowed for 75w90 and 80w90 synthetic which would have gotten much better fuel economy. Thread starter Doug; Start date Oct 29, 2004; Status Not open for further replies. Feb 15, 2004 · Here I am. 75w140 and 75w90 gear oil similarities. Can I use 80W 90 instead of SAE 80? Feb 25, 2024 · As 80w is worthy enough for both heavy and regular motors. 80W-90: 220: 90: 460: You can target the Engineering ToolBox by using AdWords Managed Placements. 80W-90 - So, Im planning to change the gear oil in my differentials soon. Jan 9, 2024 · Consequently, you can use this Oil in a temperate climate. But, yes, through tests, you can see that 75w90 is a bit decent. I'm using Mobil 1 75W-90 without any problems and very happy with it. Can I use 75w140 instead of 75w90? You can use either oil. The synthetic is more expensive as you likely already know. Also, I strongly suggest that you stick to OEM Jun 10, 2002 · I have heard that the older Ford F250s called for 80w90 but that when Ford decided to make synthetic a "factor fill" they went with a 75w140. 25/10. Reply Like isthatahemi Dec 30, 2006 · Are there any pros or cons when choosing weights for a rear differential gear oil,like 75W90 vs 80W90 vs 75W140 vs 85W140? I`ve often wondered what the best all around rear differential GL5 gear oils are,weight wise,to ensure the longest lasting rear differential. 80w90's are dino oil. However, using an oil that is not recommended for your car can cause damage to the engine. Feb 18, 2023 · Yes, you can use 80W90 instead of 75W90. 75w90 vs. Dec 1, 2005 · My owners & Repair Manuals say 75 W 90 for the front and 85 W 140 for the rear. The main difference between the two oils is the viscosity, or thickness, of the oil. Despite not being significantly different, 75w90 gear oil has a slightly lower viscosity than 80w90, especially in milder climates. Odds are the dealer wouldn;t go to that extreme. Mar 31, 2019 · I just changed mine, rear D44 with LSD, used some Redline 75W-140 and for the front Amsoil Severe Gear 75W-90. if you do use the 75w140, use the semi synthetic, it is a little move fluid or runny, when using the thicker wt lube. Sep 27, 2015 · The DC service manual I have says it should be 75w140 (Genuine Mopar Fluid 4874469 SAE 75W-140 Synthetic Gear and Axle Lubricant) and other sources from other websites that say I should use 80w90 oil (Genuine Mopar Fluid 04874468 SAE 80W-90 Gear and Axle Lubricant). While this is ideal for heavy use, users can switch to a 75w90 oil if their vehicles are primarily used within the city. The second image is from version 4, the most current one on the website. Though gear oils can be used in preferable cars and vehicles, some gurus like to suggest compatible cars and trucks that can bring the most out of your gear oil. What does 80w90 stand for? The initial value of “W” (W=winter suitability) indicates the oil’s flowability at cold The 75w140 vs. Before taking it out for a test drive I want to fill it up. Otherwise a good 90 grade is fine and saves you a little mpg. But you can use 75W90 gear oil interchangeably in your BMW car. Is 85W-140 gear oil too thick for an application calling for 80W-90 gear oil? Aug 31, 2022 · Not meaning to turn this into a "use the same oil I do so I can feel validated" thread, but my 2020 CVO has 93,000 miles with using Redline Shockproof in the trans and Redline Primary in the. , but it cost a littel more, thats why most use the 80w90-- it is about the cheapest stuff around. Sep 13, 2023 · This can be a consideration for maintenance schedules and costs. I was wondering if you all think the 90 weight would be better for longevity VS . Jun 17, 2009 · Can you go to Jeep forums and see what the guys are using with success over the long term? Now, wait a second: 75w90 and 75w140 are the same viscosity at zero. The first thing to note is that 80w90 gear oil is thicker than 75w90 gear oil. Aug 24, 2014 · The diff capacity is finite so regardless of oil weight used, it can only hold so much debris before the oil needs to be serviced. It flows more easily and can help reduce wear on gears. Jun 28, 2012 · I am getting ready to change the differential and transfer case fluid in my AWD Sienna. i use the bmw synth 75W140 in the transmission and change once a year, regardless of miles. This will help steer you towards the right viscosity answer and offer you a way to monitor diff oil temps in heavy load situations so you can take steps to protect the diff as necessary. This is because 80w90 has a higher viscosity than 75w90. mostly in vw's. I also have a bit of whining on deceleration. If you drive in more extreme conditions such as high temperatures or off-roading, then a 75W-140 oil would be a better choice than a 75W-90 option. May 22, 2024 · What happens if you use 75W140 instead of 75W90? No problem at all ! I am a mechanical/petroleum engineer and can tell you that you are probably running ~75W-115 because the only difference between 75W-90 and 75W-140 is the amount of viscosity modifiers (polymers that stretch out and make the oil more viscous at high temps). Consider your vehicle’s application when selecting between 75W-90 and 75W-140 transmission oil. The main difference between the two is the oil viscosity or thickness. Can I use 75w85 instead of 75W90? Yes, you can use 75w85 instead of 75W90. Can I use 75W-140 instead of 75W-90? Most people will not notice much difference when they switch between oil types. Both oils have the same viscosity when the engine is cold (0W), but the 0W-40 oil may provide slightly better cold-start protection. When to Use 75W-140 Oil. May 14, 2015 · Most 80w90 is regular while most 75w90 is a syn. Im open/open on the axles too. I just installed an Auburn lsd and there manual says to use non synthetic 80w 90 and that synthetic is NOT recommended because of chatter, but my Dodge truck manual says to use 75w 140 synthetic. Looks like the 75W140 is full synthetic and the 80W90 is conventional. You can use 80w90 instead of 75w90. It would probably be best to use a GL-4 lube if that is what you manual says to do. However, it is essential to use the correct gear oil for the application. But 75w90 gives a bit better performance than 75w85. Can I use 80w90 instead of 75w140? Yes, it can be used interchangeably. Can I use SAE 90 instead of 80W90? Yes it is the same… close enough anyway. Formulated with hypoid friction modifiers necessary for use in clutch or cone type differentials. $29 75W-90 Synthetic Gear Lube - 1 Quart (Pack of 2) I'd suggest using a 75w110 or 75w140, that is Using this mixture has solved the problem to some extent. Plus you can run it for 20,000 miles easy. Past Sleds - 1976 Olympic, 1979 Citation 300, 1986 Tundra, 1990 Safari L, 1993 Bravo, 1991 Q. Other than that, it will work just fine on both gear oils. Conclusion. The two oils are very similar, and one will work better in your car. This was for my son to use instead of a Honda Civic to transport our grandson more safely. e an ISO 150 gear oil grade. What Is the Difference Between 75W90 and 75W140? The main difference between 75W90 and 75W140 is that 75W140 motor oil is thicker than 75W90 motor oil. It’s used for regular lubrication and moving parts like the engine. Nov 15, 2022 · For example, if your transmission doesn’t need an 80W-90 gear oil, use a 75W-85 instead. Although I have a couple of vehicles that use it, I somehow have far more auto gear oil than I will ever use. Nov 29, 2019 · They recommended and used 75W140 instead of 75W90 in my 2006 Tundra 4. Dec 8, 2004 · There are quite a few Ford dealers that use 80W90 gear oil in the rear diffs because of bearing problems. Aug 7, 2005 · Ok I know that I'm supposed to use 75w-140 in the rear of my F250 but I have already drained it and can't find anyone in town that carries it. The truck has 162550 miles on it with no known differential problems. What is thicker 75W90 or 75W140? Q. Oct 20, 2005 · Trans gear oil for a Harley some guys say 75w140 some say 75w90. I'll consider a step up to 75w110. Jan 13, 2011 · I would go with the owners manual. Can I Mix 85w 140 and 80w 90? Yes, it’s possible to mix the two oil (But they also told me Mercon V was recommended for the transfer case, when it says right on the back not to use it in transfer cases. The brand name lubes were far more money. Otherwise, I would use the 90, as long as the differential will function properly, and will not sustain damage from using gear oil other than specified in the manual. Jun 15, 2023 · Can I Use 75w90 Instead of 75w140? Your vehicle should use 75w90 instead of 75w140 oil depending on your driving conditions and driving style. Jan 10, 2014 · Have not noticed any seal problems yet, in anything that gets beat on the track I have had great luck with swepco gear lubes. The "75W" in both oils should mean that they perform near identical in cold weather. Later in this article, you’ll know the differences between 80W90 & 75W90. The ambient temperature here is 35 deg C and I have a few concerns. 1. Most GL-5 lubes are now tested for soft metal compatibility. BMW recommends using a 75w140 synthetic gear oil. Which gear oil is best? Q. SAE 75W-140 oil is commonly used as differential or rear axle oil for many passenger vehicles and trucks with very high horsepower. Can you mix gear oil weights? Yes, you can mix gear oil weights. It's 4x4 offroad and has a 5. That why I think that the replacement of 80W-90, in synthetic oil, is actually 75W-110. What happens if you use the wrong gear oil? Q. 75W85 oils have a higher load-carrying capacity and are recommended for transmissions and differentials with higher loads. For differentials, I recommend a non-synthetic as it has been recently (and surprisingly) found that the gears run cooler with it than they do with a synthetic gear lube. They usually have 3 or so on the lot for sale. May 27, 2008 · It is recommended only for the rear diff and only for heavy towing and continuous use. Any members using 75W140 or have opinions as to its use in high mileage vehicles? Jul 7, 2012 · The only way the dealer would know it wasn't 80W-90 would be to pay to send a sample to a lab for analysis. Is the 80w90 a semi Mar 9, 2010 · Got the P71 in January from the North Carolina Highway Patrol (Raleigh office). Service manual calls for GL-5 75W-85, so I am sure that the Mobil-1 75W90 GL-5 gear oil will be just dandy. It has leaked quite som oil from the transmission. 85W-90 for temps above 0F and 80W-90 for temps below 0F (I live in Wisconsin). Try Redline Shockproof Heavy which they claim is 75w250. Trying to avoid running something too heavy and burning it up. You can use 75w90 oil without facing any problems or performance drops even if it is recommended to use 80w90 gear oil with your vehicle. Apr 30, 2021 · Can I use 80w90 instead of 75W140? Either one is fine. 80w90 should be safe to use, and you won't notice a Dec 10, 2023 · Also Read: Can I Use 10w40 instead of 5w20 / Can I Use 85w140 instead of 80w90 Vehicle Manufacturer Recommendations Vehicle manufacturers typically specify the type and viscosity of gear oil recommended for their vehicles in the owner’s manual. you guessed it. The factory fill rear differential fluid is a dino 80w-90 Motorcraft XY-80W90-QL conforming to the following specs: MIL-PRF-2105E, Mack GO-J, WSP-M2C197-A, GL-5 and MT-1 specs. Aug 4, 2009 · I have a 2009 Dodge Ram 1500 4x4. D. Jul 22, 2021 · 75w90 Vs 75w140 BMW. The older spec had a KV @ 100°C of 25 & the new spec 29. Apr 20, 2002 · Joined April 20, 2002 Messages 568 Reaction score 1 City, State Overland Park, Kansas Year, Model & Trim Level '97 XLT 5. k. SAE 90 gear oil is equivalent to 50wt engine oil (SAE 80 = 30wt), so you could always dump that in instead if you want. Can I use 80w90 instead of the hytran? It should be thicker and make the tractor leak less I think. Do yourself a favor and use the recommended viscosity. Now I would speculate a Ford mineral 80W90 has a KV@40*C of about 146 cSt. com Apr 21, 2008 · The Mustang 8. I also need a replacement fluid for the I cannot find it anywhere, and along the way found some TSB information online that years ago Ford advised its dealers that the aforementioned oil should not be used, and instead a 75w140 synthetic should be used (and even went so far as to say the tag on the rear end specing "XY-75W90–QFEHP" should be scratched through). Vehicle Application. " Note: same as what is listed in the Canada Domestic Market (CDM) manual. For my front axles, which chronically leaks the knuckle moly grease into the front diff, I may stop using synthetic, and instead use regular gear oil and change it more frequently. I can abolutely see why it is not recommened in the front axle. Jul 26, 2011 · Just checked the FAQ and it said to use 75w140 on the rear dana 35 and 80w90 on the front dana 30. 7 gals total fluid. Oct 5, 2018 · Now its that time and I wondered if since the boat is run only in warm whether, and is an older boat, if anyone thought 75w140 would be okay? The plan is regardless to try and find some that doesn't spec for limited slip full-fills. A number of people on this site also reported that they are using different brands synthetic gear oils 75W-90 instead of 80W-90 in their Toyotas without any problems. My Another name used to describe this type of oil is “steam cylinder oil” because the same effect is desired in lubricating steam cylinder walls. There is no reason to find wet rust in a rear axle. 95K miles paid $7,000 put $2,000 in for maintenance (100K mile service, replace rear axle seals, front brakes, shocks, etc). people also ask. 18 a bottle at Advanced / Discount Auto Parts but didnt have enough light to do the front, got Valvoline Semi Synthetic Blend for the rear at $5. primary. Jan 4, 2024 · Q. I put Castrol SAF-XA in there when I first got the car as I got if free through work. 5 rear axle are specd to use 85W-140 which is a synthetic. Sep 20, 2023 · In this case, the 85w140 has a pour point of negative 18 degrees Celsius and the 80w90 goes even lower to negative 30 degrees Celsius. I have a Isuzu Trooper and the manual calls for either SAE90 or SAE140 or multigrade SAE80W140 in the real axle with LSD. dylan 413 New member. Limited Slip Differential Compatibility Dec 12, 2023 · Overall, the choice between 85W140 and 80W90 lubricants depends on the type of vehicle, the intended use, and the environmental conditions. The first is from version 2 that was current about 6 weeks ago. Generally the synthetic 75w-140 is for HD applications such as towing, but it will work fine in any application. 75W90 gear oil has a viscosity similar to the following oils: 75w75 10W100 10W95 10W80 15w20 80w80 20w40 40wt40 40SCF50 80SCF50 40SCF50 SAE30 SAE40 SAE45 80X60SAE45 Jan 1, 2024 · Yes, you can use 0W-40 instead of 5W-40 motor oil. You shouldn't go heavier than 75W90 in the front and for normal duty and occasional towing 75W90 is fine for the rear. Its just that the synthetic oil stays thicker relative to the dino oil as the temp rises, such that the 75w140 "behaves" like 140 straight weight dino at 200 degrees. May 20, 2007 · that would be o. I wanna use Redline, but Redline offers 75W85 for TC and differentials, while Toyota wants 75W90. With the 90 viscosity, you may enjoy better availability and improved cushioning. the 96 takes 80w 90 , i have some of both wts on hand. 75W-90 Gear Oil: 75W-90 typically has longer oil change intervals, thanks to its robust protection and durability. You can also use Kubota UDT fluid. Sep 29, 2004 · I would not worry about about using 75W-140 instead of 75W-90. I would think your oil change interval would be reduced by half, so 50k miles instead of 100k. 80w90 gear oil has a higher viscosity than 75w90. So, those fluids are in the bike for 12,000-15,000 miles at a time. But still, We suggest you use 85w 140 instead of 80w 90. There is no problem using a lower winter rated viscosity such as 75w-90 vs 80w-90 and is most likely better (lower pour rate). However, if your vehicle is for heavy jobs like towing then you are better off with the 140 as it is fully synthetic. Jul 26, 2016 · 75w140 if hard acceleration is frequent (most probably) or towing 75w90 at low temperatures, or if hard aceleration is infrecuent (unlikely) Keep in mind this chart of viscosity vs temp. My 95 called for 75W90 and I was using that, but towing and normal driving, the rear cover blistered and peeled. I towed very, very heavy and the diff was doing great when we sold it. Limited-slip differentials also typically require a specific lubricant with a limited-slip additive. If the diff has a history of failure, then a 75w140 or for hot weather areas. A heavier gear lube in a Harley trans will quiet them down nicely. Aug 1, 2014 · I use Amsoil Severe Gear trans lube. Jun 6, 2021 · I’m looking to change the gear fluid in my Willys wrangler, I’ve heard you can use 75w-90 instead of conventional 80w-90. That's used straight out of the bottle by full-on race cars. The Ford 9" uses 75W-90, you can use either dino or synthetic, and as Spaznaut said synthetic will not cause leaks. However, keep in mind that the two oils are not interchangeable and have different properties. Some manual-shift transmissions can use GL-5, but typically should not be used in synchromesh-type transmissions, as the EP additives can be corrosive to yellow metals found in those transmission types. 80w90 gear oil is typically used in high-performance applications, while 75w90 gear oil can be used in a wider range of applications. Should I use 75W90 or 75W140? Q. So if anything it should hold up better. Everything from 75w90, 80w90 to 75w140. The manual said multigrade like 80W90 are only suitable up to ambient temperature of 30 deg C. While I was in a hardware store today, I passed on some store brand bar oil at $10 a qt. OP . BMW recommends its users to use 75W140 gear oil in the gearbox. Nov 5, 2023 · You can use 75w90 instead of 80w90 gear oil in your differential, as it offers superior viscosity for optimal lubrication and protection of the gears. Thanks! A differential mineral 80W90 typically has a KV@40*C of 135-165 cSt, i. Can I use SAE 90 instead of 75W90? Q. 79 a quart. Mobil SHC 634 gear oil is or was manufactured by Mobil Oil Corporation. In their respective functions, 75W90 and 75W140 are both acceptable for routine maintenance. com App 2011 Road King Classic, S&S 124 LC, High Flow fuel injector, 58mm throttle body, Energy One clutch and AIM clutch module, Bassani fishtails on V&H Dresser Duals, Arlen Ness Big Sucker Stage II Air Cleaner, Power Vision. Will a 75w-90 with LSD be harmful to the front Dana 30 which does not have limited slip? Sep 25, 2021 · Can you use 75w90 instead of 80w90? In general, it is recommended to adhere to the viscosity grade specified by your vehicle’s manufacturer. 09 a bottle at Autozone, I Need some help with gear oil recommendations for my AWD EcoBoost Ford Flex. This can be advantageous for vehicles or machinery subjected to demanding usage, as it reduces maintenance frequency. had 7300 miles and rear fluid was dark with lots of paste on the magnet, front not as bad. Mar 3, 2018 · For the rear diff I can use Amsoil 80W-90 synthetic gear oil also if the Severe Gear 75W-90 is not appropriate. You can also use it on gearboxes with API GL-5 performance limits. They all have the 75W140. " Jun 1, 2023 · Q. For trailer towing, use Mopar Synthetic Gear & Axle Lubricant (SAE 75W-140). The back of the bottle makes it sound like good stuff, but I am concerned with the viscosity. May 15, 2010 · Since 2001 all E class cars are factory fill w/75W85, no one calls for 80W90 even MB states that 75W85 can be used on previous models which call for 80W90 or 85W90, look at the attachment (tired of posting same things). Apr 9, 2020 · Recommended Use. . Would it be ok to use . Can't get much better than that. bought an old 624. However, checking your vehicle’s owner’s manual is essential to ensure compatibility and follow the manufacturer’s recommendations. I suppose the heavier weight would add some life expectancy to a heavily used diff. I just bought some Lucas 80W-90 (closest thing AdvanceAuto had), only to 80W-90 gear oil can be used in motorcycles, especially in their transmissions, but it’s crucial to check the manufacturer’s recommendations before making a choice. I know the owners manual recommends 75W90. I have found Royal Purple 85w-140 at a few places though. But what’s the difference between them? 80W90 gear oil is a lighter-weight oil that is recommended for use in warmer temperatures. Aug 10, 2022 · I’ll be explaining if you can use 80W90 instead of 75W90. The manual says to use 80W90 gear oil but I've seen a lot of information here recommending to use 75W140. Compounded oils are not commonly used for steel-on-steel gears. Although 80w90 gear oil is best for your vehicle, you can use 75w90 oil without any problems or loss of performance. In short, you can use 75w85 instead of 75w90. Sent from Motorcycle. Oct 21, 2006 · SRW SD's that use the sterling 10. 25 rear end with Traction-Lok. Can I mix 75w90 instead of 80w90? Yes, you can mix these oils and use the mix, but it is always advisable to consult your car manufacturer’s manual. I'm at 140k miles and never changed it (never towed anything). As a result, you can change from 75W-90 to 75W-140. Can I use Full Synthetic 75W-90 instead? 80W is out of stock. I just changed my Rear Gear Oil today and put in Valvoline Sythetic Blend 85 W 140 and bought some Mobil-1 75 W 90 for the front it was $8. May 25, 2007 · i use dino 80W90 in the fd and change every oil change. Jan 16, 2024 · For severe use applications like drag racing, a higher viscosity differential fluid, like a 75W140 may be the best solution. I use it in my 6 speed FXD and it works just fine. My repair manual calls for 80w90 for front and rear, but I've read that newer 80w90 is different than it was then. Oct 17, 2023 · When choosing between 75w90 or 75w140 gear oil, there are several factors to consider. Which is thicker 80W90 or 85W140? Q. Sep 14, 2022 · 80w90 vs 75w90: Viscosity. 75w90 viscosity 75W90 is the same viscosity as 75W85, just formulated differently. A 75W140 syn is best because it will deliver the last loss sue to viscosity . Q. People have suggested I use full synthetic 75w140 in my class c motorhome, but the Dana 70 was made to carry heavy loads and the spec for it is 80w90. Jan 31, 2009 · If you tow, use the 75W-140. Jul 13, 2014 · The manual says to use 90W or 80W-90. Jul 4, 2002 · High levels of anti-wear compounds can attack soft metals and accelerate corrosion. Would I be okay mixing 80w-90 and 75w140? Yes, I know I should take care of the whining but I am saving up for a regear/bebuild anyway. It is always best to consult the car manual or seek professional advice to ensure that you are using the right type of lubricant for your vehicle. Nov 14, 2017 · So, if one of you guys could tell me if the there is any other difference in the 90 that would make it unsuitable for this truck, I would greatly appreciate it. Motorcycle Transmission Needs: Motorcycle transmissions are subjected to intense stress and varying temperatures. 85W140 is a heavier weight oil that can be used in place of 80W90. That being said, thicker oils are better for the gears. Absolutely ZERO difference in MPG or 'feel'. 8 rear axle began calling for it somewhere around 1999- 2001, after using standard 75W90 and 80W90 for over 15 years. Mar 27, 2022 · Can I use 80w90 instead of 75w90? While 75w90 gear oil may be sufficient for most types of vehicles, you should consider using 80w90 if your vehicle will be used in extreme weather conditions. Now my question is, what can I use instead if any, for the diff fluid? The 75w140 , which the book said to use, is $23. Thanks I have same dilemma. I have never heard of so many 8. May 29, 2023 · Can Using 80W90 Instead Of 75W90 Cause Damage To My Car? No, using 80w90 instead of 75w90 should not cause any damage to your car as long as both are api gl-5 rated and compatible with your car. Using 75W80 oil in a system that requires 75W85 may lead to increased wear and reduced When it comes to gear oil, there are two common types: 80W90 and 85w140. The main difference between the two oils is that 85W140 has a higher viscosity, which means it will flow more slowly and provide more protection for your engine. I am asking because 85w90 oil is $3 a quart and 80w90 is between $7 and $10 a quart. If you’re wondering whether you can use 85W140 oil instead of 75W140, the answer is yes. specify 75W140 as well. 75w80 gear oil is a light-weight oil that has an API rating of SM, SL, or SAE 75W-90. 7. 8 bearing failures until they started filling them with the new stuff. I will see if there are any others and post back. Didn’t realize it till I left but they used 75W140 instead of the 80W90. If you want to stick with 80W-90 there are conventional brands out there. Oct 8, 2019 · 2009 - 2014 Ford F150 - 75W140 in front diff - I got my front diff fluid changed out yesterday. I used the first quart of 80W-90 and about half the bottle of 85W-140 Nov 23, 2005 · Is there much difference in cold temperature thickness between a synth 75W140 vs 85W140 GL5 gear oil? Just a lil curious. On the other hand, 75w140 is at a stronger viscosity and has a higher boiling point which costs 2 bucks a quart. Jul 14, 2015 · Jul 14, 2015 / 80w 90 gear lube instead of HY Gaurd. Jan 20, 2020 · Is it OK to use 75W140 instead of 75w90? To determine which oil is best for your vehicle, you should take into account the conditions in which it will be used. Both the oil have the same viscosity at low temperatures, but they differ in how they behave at higher temperatures. On the other hand, 80W-90 gear oil is a heavier weight oil with an API rating of SM, SL, or SAE 80W-90. Ford manuals, general information on the dana 60 front shows that 80W-90 is the recommended oil. Sep 10, 2021 · Hi! I am a new owner of an ih tractor. Dec 3, 2002 · Clutch, Transmission, Differential, Axle & Transfer Case - 75w90 vs 75w140 - Is it safe to use 75w90 in place of 75w140 in a 99 F150 rear end? I plan on using synthetic and have heard (on this forum) of people using 75W90 with good results? I can and will use the recommended 75W140 at dealer price if that is what most Apr 9, 2008 · I qualify under a "severe" use. What is the difference between SAE 90 and 80w90? Q. Is Apr 1, 2012 · I thought i got 80W-90 with both bottles, but I had accidentally picked up 1 bottle of 85W-140. Apr 29, 2017 · Yes Indeed 80W-90 gear oil will work. Should I have them put in the right stuff as well or just let it be? thanks! Mar 17, 2021 · I use 75w90 in place of all 75w85 differentials and transfer cases. However, using a higher-viscosity oil will result in a smoother ride and less noise. Can I use thicker gear oil? Q. Can I use 75w90 instead of 75w140? Can you go to Jeep forums and see what the guys are using with success over the Nov 30, 2012 · If you use too high a viscosity, most of the lubricant will not be able to reach the surfaces effectively (especially synthetics). 4lt Trinton V8 in it. This means that 75W140 can provide better protection for your gears, but it can also cause your vehicle to use more fuel. 7 Dc 2 wheel drive. Thread Starter #10 . Key takeaways include their similar low viscosity index, wide operating heat range, and 75w140’s superiority in heavy-duty settings. Jul 24, 2022 · Also check 75W90 Vs 80W90 Gear Oil. 25. 75w90 comparison shows their differences and areas of use. Can I use 75W80 instead of 75w85? While 75W80 and 75W85 gear oils have similar viscosity ratings, they are not interchangeable. What’s thicker 75w90 or 75w140? Jul 1, 2017 · Originally Posted By: Emanuel I have a 01 Corolla with a 5 spd transmission and I would like to change the transmission oil, the owner´s manual calls for a 75w90 GL4 oil and I can only find a 80w90 GL4 and a 75w90 GL5, I have read that GL5 should not be used in transmissions that call for GL4 oil so my only option is 80w90. While both oils have equal viscosity ratings, their characteristics differ based on temperature changes. The oil weight is not a noticeable difference, most if not all 75w90's are synthetic or synthetic blends. When it comes to gear oil for drag racing with a traditional differential, a locker, or even a spool, the load on the ring and pinion gears due to the much higher horsepower and torque output and the prepared track i had an older rv a few yrs back and have some 75w140 still around here, i have a 1996 class c ford now and want to change the gear oil in it. I’m going back tomorrow to complain and ask for some money back. Make sure you use the friction modifier in the rear differential though. Ford reccommends 75W-140, but the origional oil (whats in it now) is 75W-90, and that's what a lot of others are replacing it with as well. Oct 2, 2011 · Time to change my diff oil again. Usually, 75W90 is slightly thicker than 75w85, so it can offer better protection for your engine in extreme conditions. The Jeep (xj) gets usually whatever 80w90 Dino is on sale, actually every lube in the Jeep is on sale special but I change the fluids so frequently that it's really the only way to afford it. Check your specs, because i saw somewhere you needed 8. being near the engine, the trasmission soaks up a lot of heat. shwnvf ythhhsji smv xdsi iicqb eey leayl zgmz mykpw urtb