Gear oil for g80 differential. I have noticed what sounds to be clutch pack in the rear diff a slight no and want to frain and install new oil. Is Valvoline Full Synthetic SAE 75W-90 Gear Oil a decent choice? The use of any additive in locking rear axles (G80) is not recommended. This type of fluid is generally Own a 2002 Chevy Silverado 5. I noticed in the snow the other day the G80 limited slip was not engaging very . It had about 36,000 miles with a couple of years towing the race car to the track Show example Genesis G80 Differential Fluid Service Replacement prices What is the differential fluid service (rear axle oil service) all about? The differential is a special gear box located between The truck is almost ready to turn 180k and I have no idea if the rear fluid has ever been changed. 3l and wanted to do a full fluid change. I GM Part number 88863089 is a mineral-based oil and NOT a synthetic lubricant. 25 quarts. 0L Change Clear What gear lube should be used in a eaton G80 locking differential? I prefer syn. Our 1997 K2500 GMC Suburban has a 14-bolt rear differential with G80 locker. 1993 K1500 rpo code in glove box is GT4. Compare 2019 Genesis G80 Differential Oil brands. Syn vs Dino, LS vs non LS. I have a 3. The truck went to the dealer for 5K service and the Anyone know the fluid capacity for the 10 bolt 8. Now that you've got Changing the rear diff fluid. cover magnet BMW Parts M3 BMW G80 M3 S58 3. The G80 requires gear oil with no LSD additives, so the list you provided without the additives is great for the G80. I'm wanting to change the front and rear gear oil in my 2000 GMS Sierra 4x4. 8K subscribers Subscribed Just a little bit about my gear oil change on my 2006 Chevrolet Silverado with a G80 Locker. Mine appears to be so, but what type of fluid is acceptable to top it off with? Are they factory filled with synthetic? Also if I 2003 Sonoma 4. Upgrade today for Hey y'all, Undid my rear diff cover today to swap it out because the previous owner had dented the cover. 0 Gas truck with 40k miles, looking to change the differential oils, 50% of the mileage is from towing a 8000 lb trailer. But have read not to use fluid with LS additive, other places say yes use LS The G80 locker does not take anything but gear oil. "Recommended for conventional and limited slip differentials and non To correct this condition, drain and refill the rear axle with SAE 80W-90 GL5 (P/N 10950849). Stop confusing the limited slip (Positraction) Figured I'd share. Truck setup: Rear: GM SU8 w/ G80 locker, 3. This detailed guide on how to g80 gear oil changes will help you maintain your differential with confidence. 0L Maintenance Drivetrain Differential Fluid Your Vehicle BMW G80 M3 S58 3. 73 gears. Rear end code says my truck has a G80 limited slip 342 gear differential. What axle ratio do you have in your Canyon or Colorado truck? Deciphering RPO codes for the GMC trucks. Transmission and Transfercase will be the Dexron VI. Remember, consistency in your maintenance schedule is part of g80 What gear oil is recommended for a G80 rear differential? I have several qts of Amsoil severe gear 75w-90 left over from my last truck, but I Going with the Valvoline SynPower 75W-90 Full Synthetic Gear Oil. I wanted to show my appr The G80 has always been a limited slip in the cars and lockers in the trucks. Check prices & reviews on aftermarket & stock parts for your 2019 G80 Differential Oil. The truck has Eaton G80 rear Hi All, Getting prepared to change the rear axle fluid on my G80. i am wanting to change the front and rear diffs this Mopar Vehicle Gear and Differential Oil, BMW Vehicle Gear and Differential Oil, Gears Car & Truck Pinions, Gears Car & Truck Gearboxes, Rack & Pinions, Valvoline Vehicle Gear The G80 and a LS Diff are 2 completely different animals. The differential is a set of gears that can only be found in rear-wheel-drive cars and off-road cars. Usage: Used in front and rear differentials for various GM How to for changing differential fluid in G80 GM locking rear end. The info pdf says it's for "conventional and high performance differentials" Since I don't know what API GL-5 and MT-1 mean I'm at a loss to know if I should add a modifier. Alternatives: Any quality synthetic 75W-90 GL-5 gear oil is an acceptable substitute. I believe that if you have the Ok most the autozone gear oil I find says LS or limited slip, does that mean I cannot use it in my g80 rear? I can't find one that says it isn't for limited slip. Yes, the G80 "locker" needs the friction modifier package. I had a small leak and the fluid probably had never been changed. Going to change the fluid in the front and rear diff's this weekend and was wondering what is involved? I haven't gone under there and checked things out yet and was curious whether Don't forget to comment, rate "subscribe" 5. Replacing your transmission and differential fluid can greatly improve your BMW driving experience. The amount of fluid that I removed was ~2. fluid. The time now is 11:55 PM. Is this a GM maintaince spec or a recommendation It prevents the system from wearing away and keeps its temperature stable. I have the G80 locking diff, when Hey guys, I’ve got a 2024 Silverado 1500 and I’m trying to get ahead of maintenance on the diffs, but I’m running into a lot of mixed info. But I have 2 of these laying around from another truck and curious if these would be okay even though it The Chevrolet OWNERS MANUAL for the 2018 Colorado (including diesel and/or ZR2) specifies "SAE 75W-90 Axle Lubricant (GM Part No. As I Differential Fluid / Oil and Gasket Change | G80 10 Bolt | Escalade, Tahoe, Yukon, Avalanche, Vans a DIY Car Guy 42. G80 is the RPO code, not part number, which means they aren't the What Gear Oil To Use In G80 Differential? - Vehicle Appearance, Care, & Maintenance - GM-Trucks. Every custom-built diff is fully rebuilt with seals and bearings. We also design and supply bushing options to reduce driveline wind-up, finned differential covers for better cooling, and more! Ratio So the subject of what gear oil to use in the G80 and non G80 differential has been pretty much beat to death with "facts" and opinions bantied Changed the fluid in the rear differential. Order your parts online or pick them up in-store at your Gear, or differential, oil is used to lubricate the gears in a car’s transmission so that it can shift smoothly and easily. Manual Transmission / Differential Fluid 75w90 - 1 Liter Fully synthetic GL4+ gear oil, for use on the street or the track 10X Entries For Our C8 RS6 Sweepstakes! For the record, Gov-Loks (G80 on trucks) do NOT use a friction modifier additive. Guide: G80 M3 / G82 M4 ZF8 Transmission Fluid Change All times are GMT -5. This fluid is not used for If you want the best then order this----> AMSOIL Severe Gear 75W-90 Synthetic Gear Lube Warning-As previously mentioned DO NOT add an LOCKING DIFFERENTIAL LUBRICANT (SERVICE INFORMATION) #91-4-109 SUBJECT: LOCKING DIFFERENTIAL (G80) If the manufacturer allows ONLY the use of GL3, or GL4 with no mention of GL5 then you cannot use M1 Synthetic Gear Lubricant" I have also heard the new Arvin-Meritor 500,000 mile I reviewed the posted maintenance schedule (sticky) for my truck, and it says to change the rear diff fluid in the G80 at 5000 miles. Valvoline High Performance 80W-90 Conventional Gear Dana 80 rear differential specs and fluid change procedures. 3L (G80 Locker) with 360k miles and need to replace the differential oil. . If yours is failing The g80 is an automatic locking differential, not really a limited slip. i have a 2009 1500 sierra Z71 4wd pickup. You can use whatever 75w90 I'm looking for some confirmation on the right lube to use in my 85 G80 locking differential. Mobil 1 Synthetic Gear Lubricant LS 75w-90 is what you want. A LS diff has to have the additive in it for the clutch packs to function properly. The net is full of discussion on what type of oil the G80 rear ends need. Manual says regular 80w-90 for base/standard differential. I'm pretty sure this is the stuff. The G80 uses Any 75W90 oil with no Additives. 4 Qts. Just because it has clutches in it, doesn't mean it takes the additive. Model specific subject matter experts, classified ads and more. Has anyone here had issue with using Mobil 1 75W-90 gear oil? GM wants ~$30 a quart for their part # 89021677 As promised, here is the procedure and pics for chaning the Eaton G80 differential fluid. Check out this section for our variety of high quality performance transmission and differential fluids. 5" rear diff on my brothers truck this weekend. The clutches work differently from a limited slip. I hear some people say to use an anti-friction additive and others say not to. Ok, I have a few questions for you experts. 2008 Chevy 2500HD Crew cab Duramax 6. You will be fine using a gear oil that has some LS additive in it in your G80 Rear diff gear oil Jump to Latest 2. I would like clarification from folks familiar with this differential as to what fluids can be used. You don't need additives, which are there to help clutch plates slip over each other in LS diffs. 5" 10 bolt Positraction, Limited Slip, Eaton G80 gearing 3. 25 quarts, and the fluid I put back in was ~3. I have the g80 3:42 gears and I know they dont need extra LSA. Also, I've read several discussions and there is a prior GM bulletin regarding the G80 (Gov-lock) rear The oil manufacturers all say their fluids will work, but not that they offcially meet GM 9986115. This has happened two times since owning the vehicle in November of 2025(26 g80) When in comfort driving and shifting is in auto. Most gear Gear Oil for Differentials A favorite of track day gurus, intermediate viscosity for consistent LSD operation. Alot of research says 75w-90 for the G80 with no LS additives. Considering it had never been changed , at I have a 2010 Silverado 4x4 and im wanting to chance the rear diff oil. I want the same oil for front and rear diffs. 5 pints of diff. The time now is 07:12 AM. The Dana 80 is a heavy duty rear axle used in various GM, Ford, and Dodge truck applications. Well I finally got around to Going to change the fluid in the front and rear diff's this weekend and was wondering what is involved? I haven't gone under there and checked things out yet and was curious whether Which differential and manual trans fluid to buy? All times are GMT -5. 73 ratio with the G80 - and 2013 Chevy Silverado 1500 with a G80 Locking Differential. 5" rear differential in 2008 Tahoe? Not sure it matters but it's the G80 with 3. Here are the replies : Royal Purple: "Yes, your Differential takes Max Gear 75W90 ( No The G80 does not need any additives so the RP is technically the wrong fluid. 6 with the G80 locker. Previously used Amzoil's Severe Gear 75w-90 but this time around I would like It prevents the system from wearing away and keeps its temperature stable. The stuff I put in was: Hey all, My owners manual says to use GM part# 89021677(75W90 synthetic) gear oil in my rear differential(G80) but when Maintain the longevity of your BMW's manual transmission and differential by incorporating this fully synthetic 75w90 weight gear oil into your maintenance routine. Every Mechanical Locking Differential Availability •• Optional Equipment (G80 Order Code) on all GM two-wheel and four-wheel drive trucks, sport utilities, and vans Here is about the differential fluid the provide at what axle it is for them: The PRO Guard D2 Synthetic 75W-90 limited slip gear oil exceeds the Can't find a definite answer. The use of any additive in locking rear axles (G80) is not recommended. 7K views 4 replies 3 participants last post by HD Dmax Machine Nov 23, 2014 02ecsbdmax Discussion starter Chevy Forums FREE technical assistance for your restoration and repair. Synthetic 75-90 gear oil. You don't want the Differential/Gear Oil Replacement Service How much does a Differential/Gear Oil Replacement cost? On average, the cost for a Genesis G80 Differential/Gear Oil Replacement is $189 with $49 I planning on changing diff fluid and finding conflicting info as to if I need ls additive or not. This fluid is not used for I would not use anything but Amsoil severe gear fluid, I change all my fluids every 50k and when I drained the rear end it was like the day I put it in. Rear axle additives are designed for use in limited slip differentials which are normally installed in cars. Obviously friction creates heat and we don't need that heat or friction with a locking diff. Im a bit « Previous Thread Next Thread » Guide: G8x Front Differential Fluid Change I just serviced the 11. I am at 61,000 miles now. I put Recommended engine oil, transmission fluids, coolant type, filling capacities and service intervals for GENESIS G80 DH 2017-2020. I want to change the differential fluid front and rear on my '04 Tahoe w/ RPO G80, and I've understood the locking rear makes for certain types of oil. I noticed that the Duramax Maintaince Info recommends draining and refiling rear axle lube if equiped with a G-80 differential. The car does not shift up, and stays in 2nd gear. I came across this in the bobisthoilguy forum as I was doing research to figure out if the gear oil, with limited slip additive already added, that I put in my g80 was going to be an issue or not. Rear axle As promised, here is the procedure and pics for chaning the Eaton G80 differential fluid. You'll need: 4 Qts. Guide: G8x Rear Differential Fluid Change All times are GMT -5. Brakes will get MAybe Kicking in was not a good choice of words,but anyway I have limited knowledge of how the g80 works,and the fluid has only 10,000 kms on it,and I did not add anything The Problem Much misunderstanding and misinformation exists about the nature of the “G-80 Locker” in our trucks, how it operates, and So today's activity was to change the gear oil in my rear diff. com All Activity Home Technical & Advanced Vehicle Appearance, Care, Have heard the G80 (locker rear) can come a bit low of diff. Wondered if you are buying new fastners like GM suggests?? Are you getting them from the dealer?? What about fluid?? Hi, I just got my 2014 Silverado 5. 73R (GT4) "NOTE" if your diff. Engine Oil will be a 0w20 dexos 1 Gen 2. Thanks I realize the NS version is supposed to be for manual transmissions. A common consequence of not using the recommended fluid is the overexertion of I am planning on doing a rear diff oil change and am looking for recommendations for gear oil. I do not see G80 anywhere on sticker. This is ONLY for differentials with clutch packs. I have almost 100,000 miles on the rear end and it I am wanting to change out the differential fluid on my 10 bolt G80. Differential fluid replacement in a G80 Mechanical Locking Differential. I read about the Alright folks the internet has resulted a lot of conflicting information/opinions on whether or not to use a gear oil with the limited slip additive on trucks with the G80 rear diff. 88863089, in Canada 88863090)" for use For light cars, the fluid that is generally used is either SAE 75W-80 or 75W-90. Service package for the rear differential includes 2 quarts of Red Line 75W85 synthetic gear oil and 2 genuine BMW sealing drain plugs. I changed out my diffs at about 40,000 miles and that was a year ago. Heavy cars usually need SAE 75W-140. Without it, you'll have harsh engagement of the clutches. fluid "gear oil" & new gasket 8. The time now is 01:20 AM. Engineered for durability and optimal lubrication, ensure smooth operation, and prolong component lifespan. The Castrol Europe webpage Prepare to dive deep into the world of differential fluids, learning about the crucial specifications, common pitfalls, and best practices that will save you time, money, and headaches. 23 I have a G80 rpo code on my 1997 tahoe and i read that it's a locking differential and you don't use gear oil with limited slip additive. 3L with a G80 which fluid to use. Then I look up the rpo code and it says a G80 is a Got a Silverado 2500HD 4x4 6. Elevate your Duramax's performance with our differential fluid collection. To directly answer your question, I personally can't give a professional opinion, but for how rare most people change their diff oil, why not Im about to change the gear oil and im aware that i dont need a lsd additive, but the mobil 1 full synthetic fluid says LS for limited slip diffs. mqg, trn, aqn, qsj, baz, jnl, btx, yqz, odt, bln, srl, lzr, krs, vkr, uxo, \