It might be even fun and a good thing to do with your kids on a weekend to teach them how basic machinery works. The amount of fluid that I removed was ~2.25 quarts, and the fluid I put back in was ~3.25 quarts. The 06 2500HD was available with a 11.5 RG rear differential, a 9.25 RG rear differential, a 9.75 RG rear differential, a 10.5 RG rear differential, a 9.5 RG rear differential, or an 8.6 RG rear differential. Benefits of our formulas include: Improved fuel economy Better cold weather starting Reduced friction Decreased noise and vibration Extended oil change intervals Increased engine life Our Blue Diamond pure poly-alpha olefin (PAO) oils, paired with specialized additives, are among the recommended oils for Duramax engines. Come join the discussion about reviews, drivetrain swaps, turbos, modifications, classifieds, builds, troubleshooting, maintenance, and more! Of course, this is a relatively small range; it's much easier to know what You're getting into once You begin the fluid change, so just be sure You've correctly identified Your specific truck's rear differential before beginning. Please be noted that all capacities listed here are approximate. The Chevy Silverado as a heavy truck uses a gear oil with a viscosity of 75W-90. You should schedule service for a gear oil change every 30,000-60,000 miles in the Silverado. 6.6L Turbo V8 Diesel. year to help you gain confidence about one of your largest purchase decisions. Use engine oils that have one of these designations: CI 4 or CH 4 for DURAMAX diesel engines. If youre not tracking mileage between oil changes, signs you may need to change your oil include: Its wise to stay on top of your oil change needs to keep your engine healthy and long-lasting. ! 3975 Morrow Meadows Drive I bought the 2 1 gallon gallon jugs and i was able to fill both with plenty of left over.. Fully synthetic oils require fewer oil changes, but youre often paying more for the quality. No, you do not need a friction modifier in your rear differential. Changed the fluid in the rear differential. You can also go ahead and apply the white Loctite to the old drain plug as well if you are reusing it and then allow the Loctite to dry. STL, MO. Safety Features. Once the fluid stops dripping out, you can re-install the drain plug. In this video we show how to service the rear differential fluid on a Chevrolet 2500HD. Overview Silverado 2500HD 4WD Crew Cab Long Box LTZ Package Includes Price starting at $41,695 Drivetrain 4-Wheel Drive Engine Order Code LY6 Engine Type and Required Fuel Gas V8 Displacement. Maybe that is why they want it changed so often. Changing the engine oil and filter on a 2014 Chevy 2500 with a 6.6L How to Check Fluid Levels on a Chevy 6.6L Duramax. JavaScript is disabled. 2 pints = 1 qt. Compare 2008 Chevrolet Silverado 2500HD different trims: 2023 MH Sub I, LLC. If so, then it might be time to replace the power steering pump. Your oil needs to work as hard as your engine. The Questions and Answers on this page are the statements and opinions of their respective authors and not VehicleHistory.com. I would have ordered the wrong amount. BLUE DIAMOND PAO OIL 15W40 BLUE DIAMOND PAO OIL 5W40 GREEN DIAMOND FLEET OIL 15W40 GREEN DIAMOND FLEET OIL 5W40. The automatic transmission in your truck works hard. Changing the air filter on a 2014 Chevy 2500 with a 6.6L LML Duramax with Frantz oil bypass filter system. Most motor oils are made up of a blend of additives designed to improve performance in some capacity. The Fora platform includes forum software by XenForo. ATS Protector Differential Cover - AAM 14-Bolt 11.5-inch Rear 2.5 quart fluid capacity over stock Optimal gear lubrication Easy fluid service without removing cover Aluminum pan with black powder coat finish Built-in Heat sink for cooler oil Everything is included for easy installation Sold As A Kit Fits: For a better experience, please enable JavaScript in your browser before proceeding. Just like your transmission, the transfer case requires fluid for both lubrication and cooling. Vehicle History's team of automotive experts brings you the most accurate and up-to-date used car information. Thinner oils run better in the winter, so a lower number before the W would likely be better for working in cold winters. I want to say mine was "low" by my standards when I brought it homeit was around a 1/2 inch (or more) below the fill hole. This resistance to flow ratio is called viscosity. Thats funny that you say that. These are our recommended minimum maintenance intervals for vehicles that are driven daily, and in many cases are shorter than the factorys recommendations. Hard to pay that much for the almost 3 gallons of synthetic when the Spicer manual says that mineral oil is fine. Changing the fuel filter on a 2014 Chevy 2500 with a 6.6L LML Duramax. For a better experience, please enable JavaScript in your browser before proceeding. Different oils offer different driving capabilities, so its essential to match your oil with the vehicles performance capabilities. F (-18Deg. The following intervals are based on the assumption that you will be doing the service work yourself, as opposed to paying to have the work done. At some point, something will go wrong. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Changing the air filter on a 2014 Chevy 2500 with a 6.6L LML Duramax How to Grease the Front End on a Chevy 2500 6.6L Duramax. How to Replace Transfer Case Oil I do a lot of towing with mine. JavaScript is disabled. The question of synthetic oil should still play a role in your decision-making. anyone know for sure? Doing basic service for your 2006 Chevrolet Silverado 2500 you're not only saving money, but also also improving your technical skills and learning something new. Go here and double check: http://www.ringpinion.com/ Joined Apr 14, 2008 . When it is very cold, below 0 Deg. 75W90 for front and rear. Also rear ends get pretty toasty and the vent tube is important. All engines equipped with a diesel particulate filter (DPF) require a low ash engine oil meeting CJ-4 or CK-4 specifications. Stiction Eliminator removes the stiction to help reduce the turbos spool time and build RPM boosts more quickly. :stirpot: A forum community dedicated to Dodge Cummins Diesel truck owners and enthusiasts. This article applies to Common Problems Run the fill pump tube into the fill hole. By logging into your account, you agree to our, Current Chevy Trucks, SUV's, Crossovers & Vans, Do Not Sell or Share My Personal Information. Vehicle in question is a 2016 Chevrolet 2500HD, 4x4, gas (L96/6L90E). An 8.6 inch rear differential is equipped with 4.2 pints and the Silverado's 9.5 inch rear, useS5.5 pints. Safety. A better alternative is Royal Purples Syncro Max MTL fluid. Every 250 miles or weekly, whichever comes first Check the engine oil level Check the coolant level Check the windshield washer fluid level Check the brake and clutch fluid levels Check the tires and tire pressures ( Section 5 ) Every 3000 miles or 3 months, whichever comes first All items listed above, plus . Pump slowly until fluid starts to come out of the fill hole. Choosing the best oil for the LB7, LLY, LBZ, LMM, LML or LP5 Duramax is a matter of understanding all your necessary oil characteristics and finding a product that checks every box. While oil capacity is one thing to consider when dealing with your engine oil, theres much more to think about, like other Duramax fluid capacities, oil factors and unique performance needs. Check the tires and tire pressures ( Section 5 ), Check the automatic transmission fluid level, Check the lubricant level in the front (4x4) and rear axles, Check the manual transmission lubricant level, Check the transfer case lubricant level - 4WD, Replace the spark plugs (conventional, non-platinum)**, Service the cooling system (drain, flush and refill) (green-colored ethylene glycol anti-freeze only), Check the steering, suspension and driveaxle boots, Change the automatic transmission fluid and filter**, Change the manual transmission lubricant**, Inspect the Exhaust Gas Recirculation (EGR) valve, Replace the Positive Crankcase Ventilation (PCV) valve, Service the cooling system (drain, flush and refill) (orange-colored DEX-COOL anti-freeze only), Operating in mostly dusty areas (dirt roads, or off-road), Idling for extended periods and/or low speed operation, Mostly short trips (less than 4 miles) when outside temperatures remain below freezing, In heavy city traffic where the outside temperature is regularly above 90-degrees F (32-degrees C), Frequent off road use or if the vehicle is driven through water. Note that CJ-4 and CK-4 oil categories are backwards compatible, they supersede the older CI-4 and CH-4 specifications. They take the standard 80-90 gear lube usually. Wheelers fill them up really high all the time. Compare 2008 Chevrolet Silverado 2500HD different trims: 2WD Crew Cab 153" LT w/1LT Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more! If you didn't purchase a new drain plug, use the time while the fluid is draining to clean any metal shavings off the old one. I run 75-140 Synthetic in both front and rear. So the question is. DIY car service is not as difficult as it looks like and it might save you thousands of dollars per year. The front I'm pretty sure is a 8.25" differential. So all in all it sounds like just fill the diff until it comes running out the fill hole. Dodges use Dana rear ends and front ends. Used Mobil 1 75W-90 gear oil. It may help you decide what you want to use. year to help you gain confidence about one of your largest purchase decisions. It should take right around 1.5-2 quarts to fill it back up. 2008 6.7 Quad cab SB, G56, 3.73, black, Edge Insight, 285-70/17 BFG, Bilstein 5100 shocks, MagHytec rear diff cover, otherwise all stock. You can now remove the drain plug using the 18mm socket. This best rear differential fluid completely eliminates any moaning sound that often occurs at cold or when starting a turn: using the Honda 08200-9003 differential fluid, the sound stops at once. ColoradoFans.com is the best forum for the Chevy Colorado community to discuss the truck's reliability, diesel or transmissions problems and more. Take care of your 4WD system, and it will take care of you. If your product doesnt deliver the way we promise it will, well give you your money back. This article applies to the Chevrolet Silverado 1500 (2014-present). (lbs), Fifth Wheel Hitch - Max Trailer Wt. $117.23. In many cases the initial maintenance check is done by the dealer at no cost (check with the service department when you buy the truck for more information). The Chevy Silverado as a heavy truck uses a gear oil with a viscosity of 75W-90. SAE 10w-30 temperatures above 0 degrees F, Synchromesh transmission fluid or equivalent, Syn-torq synthetic transmission fluid or equivalent, Trans-Synd synthetic transmission fluid or equivalent, DEXRON III automatic transmission fluid (2006 and later models require DEXRON VI). Changing the fuel filter on a 2014 Chevy 2500 with a 6.6L LML Duramax. It take 2 qts in the front and about 4 in the rear. I put about 3.5 qts. If you have a torque wrench you can torque it to 15 ft-lbs.. You can (and should) replace the fluid in the diffs around 45-50k. Greetings, I have lurked these pages for a long time, but don't post much. this fluid when hot expands. Once it's dry, you can re-install it using the 18mm socket. C), you should use SAE 5W-40 to improve cold starting. The Fora platform includes forum software by XenForo. Apply the white Loctite to the fill plug. But i honestly dont think that much more than the line on the diff cover will blow a pinion seal. The automatic How to Replace Power Steering Pump You risk blowing a pinion or axle seal by overfilling it like that. It seems that How to Replace Transmission Pan and Change Fluid JavaScript is disabled. Transmission: Recommend: UseDiesel Extremeevery 6,000 miles andEveryday Diesel Treatmentwith every fill up. The more you can do on the outside the more comfortable you'll be while doing it. The Fora platform includes forum software by XenForo. Your 2006 can use syn in the front since they fixed the problem with the vent in 2004. Thisfriction reducer is made with uniquepatented synthetic lubricants. Materials Needed 18mm socket New drain plug or white Loctite Car ramps (optional) Fluid hand pump Drain pan Wheelers? does not research or authenticate any of the Answers provided. Ever notice a salt truck covered in slush but the pumpkin is bone dry? VehicleHistory.com Add this car Differential oil is essential to lubricating the driveshaft and wheel axles in a vehicle. Here are some of the common issues complained about. OK thank you. Thisinexpensive preventativeadditive can help you resolve andavoidfuturestiction. If I do a burnout only the right wheel spins when the left tries to it stops it. Don't loose the 4WD in your Chevy Silverado. They're very powerful and capable, but they're also very vulnerable to poor fuel quality. MAG-HYTEC covers and pans set your vehicle apart in both aesthetics and function - cast in A356-T6 aerospace quality aluminum and texture powder coated black with matching cooling fins. These characteristics have changed over the years, making oil choice important to your engines age. Help the community, write about it and we will improve this page. This site is intended for reference only. 5-speed transmission without low gear (MG5), Front axle drive shaft spline or one-piece drive shaft spline (two-wheel drive with automatic transmission), Outer tailgate handle pivot points, hinges, latch bolt and linkage. We offer a wide range of products to keep your Duramax healthy and functional, and with free shipping on orders over $49 in the U.S., placing your order is a breeze. The 4WD in the Chevy Silverado consists of many components. . When looking for the best oil for Duramax engines, its important to consider if the additives do what you need them to. Since Duramax engines are diesel-powered, you should look for an oil designed for diesel. The rear differential fluid capacity for the Dodge Ram 1500 is only 3.9 quarts. This process helpsreducefriction and lubricatesyour oil system. 1A Auto Parts When your vehicle performs heavy-duty functions, its putting even more stress on the oil, and your oil needs to continue to flow to lubricate the different engine components. I was looking to change the front and rear differential fluid and had questions about the weight of the fluids in the front and the rear. I don't think you can even get a different rear than the AAM 11.5". Changing the engine oil and filter on a 2014 Chevy 2500 with a 6.6L LML Duramax with Frantz oil bypass filter system. However, one area that can be easily forgotten about when servicing this vehicle is the rear differential. I am at 22,500 miles, and planning to change all drivetrain fluids. Benefits of our formulas include: OurBlue Diamondpure poly-alpha olefin (PAO) oils, paired with specialized additives, are among the recommended oils for Duramax engines. My Favorite source for parts & filters and Amsoil is MadJack Diesel Performance. I have edited that post with the current information. What follows is our quick reference guide for the 1999-2006 Chevy Silverado/GMC Sierrapickup trucks (and 2007 Silverado/Sierra Classic), plus Avalanche, Tahoe, Suburban, and Yukon SUVs, taken directly from Haynes manual 24066. '98 Jeep XJ. check the fluid every oil change for level and fluid color. Examine the plug for metal shavings from the gears. 2008 Chevrolet Silverado 2500HD models The 2008 Chevrolet Silverado 2500HD is a 3/4-ton full-size pickup that's available in three body styles: regular cab, extended cab and crew cab.. The owners manual tells me what oil to use but not amount. 2.75 quarts (rear with 9.5" and 10.5" diff.) Trans Mfr CD 1000/MW7 and 1000/M74 I read about the fill height and not how many quarts might be needed for a refresh. Changing the rear differential oil on a 2014 Chevy 2500 with a 6.6L How to Replace a Fuel Filter on a Chevy 6.6L Duramax. Now with 5qts in there no problem. I put fluid in until it ran out the fill plug. The amount of fluid that I removed was ~2.25 quarts, and the fluid I put back in was ~3.25 quarts. Think about it a modern turbocharged engine will have different requirements than a truck manufactured in the 50s. It needs to lubricate the clutches, gears, and bearings in the rear end. '12 Crew Cab 3500 4X4, 3.73s, auto, Longhorn Dually. Gasoline and diesel engines come with different oil needs. 2011, 2012, 2013, 2014, 2015, 2016 GM (Chevy and GMC) trucks. The 06 2500HD was available with a 11.5 RG rear differential, a 9.25 RG rear differential, a 9.75 RG rear differential, a 10.5 RG rear differential, a 9.5 RG rear differential, or an 8.6 RG rear differential. Rear Axle (Steerable): Synthetic Gear Oil; use ONLY GM Part No.12378557. Drain and Refill, Allison 6 speed - 7.4 quarts service refill, 12.7 quarts total capacity GM-Allison 10 speed - 20.6 - 22.1 quarts total capacity, How to Change the Oil and Filter on a Chevy 6.6L Duramax. If you see any large chunks of metal, that is a sign you have internal damage somewhere in the transfer case and you'll need to rebuild it. Think about the differences between a personal truck and a heavy-duty utility truck. 2000 GMC YUKON SLT, 5.3L tow pkg, G80 rear/w 3.73 gear. Do you have some data, service manual, bulletin or just found a mistake? I have not been able to find the correct volume of fluid; however, the level should be between 1/2" below the hole, to the bottom of the hole (truck level). 10W-30 engine oil is listed in the 2001 to 2007 Duramax diesel manual, it comes with no recommendations; it is acceptable, but not preferred in any instance. Dcouvrez en images les prvisions mto compltes du 28 fvrier 2023 Paris et en le-de-France sur BFM Paris le-de-France, la premire chane d'information de la rgion parisienne. Tag on the differential suggest a level to maintain- 15 to 40 mm below fill hole (not real easy to determine). The rear differential fluid capacity in a 2006 chevy 2500 hd is 3 quarts. If you have any further interest please visit http://www.2carpros.com Shop the 2CarPros store This Is. If your 4WD selector light switches on automatically without your control, read more to learn how you can resolve the issue without visiting your mechanic. GM recommends a 15W-40 viscosity grade engine oil in all instances that the ambient temperature remains greater than 0 F. If the ambient temperature is below 0 F, a 5W-40 engine oil is required to maximize protection during cold starts and the engine warm-up period. Your vehicle manufacturer will recommend an oil viscosity thats best for your Duramax. Are you getting an arm workout while driving your Chevy Silverado? in your garage to make future searches easy. There's a couple different recommended transfer case fluids depending on your transmission and transfer case combo. 2007.5 White 3500 6.7CTD 265,00KM 68RSE Auto 3.73, , EGR + Cooler /DPF Deletes , Smarty S67ME level #9 , Amsoil 15W40 , Amsoil BMK21 bypass filter , Rinoliner , Isspro guages - pillar mount 3 - console mount 2 - overhead mount 4 , Progate Exhaust wastegate , Flowpro dual exhaust , Flowpro Twister muffler , Mag-Hytec Diff covers F & R , Amsoil 75-110 Diff Oil , Mag-Hytec tranny pan , Firestone airbags , S & B Air filter system , Roda Deaco PAS , MHP Stage ll tranny tune , Fass 150 puel pump system , Industrial injections twin compounds , ARP Head studs , Spyntech hub kit, http://www.cumminsforum.com/forum/6-7-liter-general-discussion/334512-best-75w90-gear-oil-amsoil-redline-royal-purple.html. Depending on Your specific rear differential in the 2006 Chevrolet Silverado 2500HD, You'll use the same type of gear oil (75W-90), but varying capacities. 2008 qc/lb 3500 lrmie smarty, deleted, 20% tint, tdk bumpers, 145 glns of fuel, killer sound system, CAI, 125k miles. Modern vehicles need much less maintenance than the vehicles of 25 years ago, but they still need fluid changes, inspections,and adjustments. Generally, Duramax engines will take two different oil types: While theres no wrong answer for your choice of oil grade, you should consider the care requirements that come with each. The What is Wrong with my 4WD? The AAM axles are full when they're 1/2" from the fill hole, there should be a fill level line on the rear diff cover even. Like the drain plug, this only needs to be hand-tightened. I got a 97 k1500. Is Valvoline 75w 90 good for a read end on a 2011 Chevy Silverado z71 four wheel drive. 2014, 2015, 2016 GM (Chevy and GMC) trucks. I think I used almost 3 quarts, 2+ each. DO NOT add Friction Modifier. Get something good. Trucks use a Locking rear differential which completely locks up when one wheel spins more than 100rpm more than the other and will remain locked until about 25 mph. When looking for a viscosity rating, youll see a number like 5W-40. that seems a little excessive, so not sure. Even modern cars stuffed with electronics can be serviced in your garage or even in your driveway. What year is your dually and is it the HD model? DO NOT PUT THE BLUE GM "AUTO TRAC" FLUID IN THIS T-CASE! The cover is bolted on with twelve 10mm bolts and the plug can be opened using a 3/8" drive. . Changed the fluid in the rear differential. My Favorite source for parts & filters and Amsoil is MadJack Diesel Performance. Add coolant as necessary to bring to appropriate level. Come join the discussion about performance, lift kits, wheels, tires, modifications, troubleshooting, maintenance, and more! #1. Use liquid thread sealer on the bolts threads. Could be as simple as the position of the asymmetrical center sectionturn it one way and it will displace more volume than if its turned 90*. All Rights Reserved. If you can't get the fill plug out, then you don't want to proceed with draining the fluid; otherwise, you're stuck until you do get it out. The esters also increase the rubber seals lubrication and swell the seal to prevent oil leaks. '07 Dodge 2500 QC SLT TRX4 Offroad 4x4 SB 6.7 Auto full deletes XRT Pro Pusher Intake Manifold & tube S&B with scoop my DD. Our 6.6L LB7 Duramax Maintenance guide goes over everything you need to know to properly maintain these trucks. It's really hard to screw something up and damage your car permanently if you use right tools, follow Chevrolet Silverado 2500 HD service manual and use right parts and fluids in prescribed amounts. When adding, be sure to fill to the approximate level. An 8.6 inch rear differential is equipped with 4.2 pints and the Silverado's 9.5 inch rear, useS5.5 pints. When you want the best diesel oil for a Duramax, you need to take all considerations into account. Thesynthetic esterin the eliminator helps regeneratedeposits and additivesin thesolution. Strangley GM (last time I checked) and AAM both call for the heavier oil. FR3 Friction Reduceris an oil additiveand infused in all Hot Shots Secret oils that increaseslubricationandreduces wearontheoil. Theparticleschemically bondonthe surface, increasing lubrication and strength. 328 Reaction score 175 Anyone know the fluid capacity for the 10 bolt 8.5" rear differential in 2008 Tahoe? . You may have replaced your oil, but your engine still isnt quite right. Because frequent maintenance enhances the efficiency, performance and resale value of your Jeep, we encourage you to follow our schedule. It's the same rear as the 88-98 trucks, which was an 8.5", but in 99 they started using larger bearings on the differential, so they dubbed it the 8.625", or 8.6" for short. 2007.5 3500 MegaCab SLT SRW 4x4 6.7L, 68RFE w/ Mag-Hytec, XRT Pro, Diamond Eye DPF Delete, leveling kit w/ Bilstein 5100s, SnugTop Rebel shell, Insight CTS, Hell Bent Steel SBS -. All rights reserved. I have a 10.5", and I want to remember the 10.5" is "level with the fill hole"; but I do know it depends on the differential. Before doing any DIY service please check your insurance policy and Chevrolet warranty policy for your region. What is the capacity of the rear end fluid on a 2012 2500HD Silverado with a Duramax and Allison trans - the? VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Some say that only the HD models come with the 11.50" rear end. $16.81. Most of these recommended routine maintenance tasks you can do yourself at home for practically no money, as long as you have a few simple tools and the time to invest. May 11, 2009. bigjerm7 said: 2009 Duramax 3500HD 4x4 Dually. If it does by chance, lesson learned. Its designed to get you and keep you from getting stuck, not for performance at 60mph like you would need in a Corvette. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. (lbs), Wt Distributing Hitch - Max Tongue Wt. (lbs), Wt Distributing Hitch - Max Trailer Wt. It's all may be done by yourself in a mater of a couple of hours. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50. If your vehicle is operated under severe conditions, perform these maintenance tasks at half the recommendedintervals. Used 75w-90 in the front (conventional since mine was a 2000 and hers is a 2002) and Syn 75-90 in the rear. Tag on the differential suggest a level to maintain- 15 to 40 mm below fill hole (not real easy to determine). Im going to change the front and rear differential with royal purple, does anyone know how much i will need for the front and the rear if i drain and fill. These AAM axles aren't like the Dana axles used in previous years or in Jeeps where the full line is the fill plug opening. Before this thread gets too far off topic: I never seen a diff go bad from too much fluid. Transfer case: Dexron III ATF is the factory called fluid. Now granted these trucks are doing highway speeds and our crawlers arent. If your running MAG-HYTEC trans pans its brings the total capacity to 10 1/2 qts, the Allison deep pan brings the total to about 10 qts and the rear diff . FR3 can reduce wear rates by 43%. Starting Price (MSRP) Chevrolet Silverado 2500HD LT For Sale. To rub some more salt in the wound it's not a Dana axle, it's AAM 11.5". What Is a Fuel Filter (and What Does It Do)? the 10.5 takes 3.25QT / 9.5 2.7QT .. now on filling with the vehicle LEVEL in warm weather fill to just below the fill hole. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. In some regions DIY service may invalidate your warranty. We research hundreds of models each VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. * This item is affected by severe operating conditions as described below. 2001 to 2007 model year engines require a CI-4 or CH-4 engine oil, while later 2007.5 and newer engines require a CJ-4 or CK-4 engine oil. Consider the following factors when selecting your oil, and make sure to research manufacturer recommendations. Are you referring to people that specifically off-road Rams with the AAM axles or just in general? 46 people found this helpful. LT. $33,180. The official recommendation for oil changes in Duramax engines is every 7,500 miles oras prompted by vehicle information display. Here's a link to a thread I started recently on gear oil. Follow the Manufacturers Instructions for the mixture ratio. A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. If you drive in dusty areas, tow a trailer, idle or drive at low speeds for extended periods, or drive for short periods (less than four miles at a time) in below freezing temperatures, even smaller intervals are recommended. Get your hand pump and fluid ready to go back under the truck. If you plan to tow at all go with the 140w lube. This article applies to the Chevrolet Silverado GMT800 (1999-2006). I have a 2008 2500hd duramax I'm looking to make it posi. Just put in synthetic 75w-90 oil. 75x90, or 75x140. the OM also says to change the diff fluid every 15,000mi. Hot Shot's Secret. My owners manual does not tell capacity. Here is some helpful specs from a different forum article that will cover gas trucks as well as the 6.6, its all useful information. JavaScript is disabled. All capacities are approximate. Differential fluid, also called gear oil, is the fluid that is poured into the rear differential housing. . That's correct; the 6.0 gassers have a different rear differential (10.5") than the 8.1L and the 6.6L (11.5") on the 2500/3500HD's. My previous response should have said the 8.1L gas engine and the 6.6L diesel use the same rear differential. Luckily, this can be addressed by following the proper L5P Duramax Maintenance schedule.