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. 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. Oil flows more easily in high temperatures and has a harder time flowing in the cold. I'm just trying to find what a good amount would be to stick in a dually rear end. If your product doesnt deliver the way we promise it will, well give you your money back. 75x90, or 75x140. 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. Benefits of our formulas include: OurBlue Diamondpure poly-alpha olefin (PAO) oils, paired with specialized additives, are among the recommended oils for Duramax engines. 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. For a better experience, please enable JavaScript in your browser before proceeding. The owners manual tells me what oil to use but not amount. Changing the rear differential oil on a 2014 Chevy 2500 with a 6.6L LML Duramax. If you plan to tow at all go with the 140w lube. Do you no the ring gear for my truck. Gasoline and diesel engines come with different oil needs. Hard to pay that much for the almost 3 gallons of synthetic when the Spicer manual says that mineral oil is fine. Hot Shot's Secret. Changed the fluid in the rear differential. So the question is. A clean plug is a good sign gears aren't worn down. I am at 22,500 miles, and planning to change all drivetrain fluids. $16.81. Come join the discussion about reviews, drivetrain swaps, turbos, modifications, classifieds, builds, troubleshooting, maintenance, and more! 2014, 2015, 2016 GM (Chevy and GMC) trucks. AAM and the Dodge service manual call for synthetic 75w90. Severe conditions include the following: ** If operated under one or more of the following conditions, perform theseprocedures at half the recommended interval. Thanks for the info Heartbeat. 75W90 for front and rear. :S: Amsoil just came out with a "Upgraded Technology" Nov 2010' per Falex Extreme-Pressure Tests (ASTMD-3233) 80% increase in EP (extreme pressure) Protection, also increased in anti-wear properties under heavy load. For those high-performance needs, you need an oil that matches. If you need more guidance, or even step by step instructions and a video demonstration, get theonline manual, or ourtraditional printed manual. $117.23. 2.75 quarts (rear with 9.5" and 10.5" diff.) If you don't, this is right around hand tight. The Chevy Silverado as a heavy truck uses a gear oil with a viscosity of 75W-90. Overview: How To Use OBD-II Scanner to Check Engine Light Codes - What type of scanners are there? What is the capacity of the rear end fluid on a 2012 2500HD Silverado with a Duramax and Allison trans - the? 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. Stiction Eliminatorisasynthetic cleaner thatsafely and effectivelydissolvesstiction (sticky friction) found onenginecomponentsthat have become coated in oil. We research hundreds of models each 08 5500 4x4 G56 4.44s, SB 3250 dual disc, XRT Spicer 7041 Aux trans. So all in all it sounds like just fill the diff until it comes running out the fill hole. My cover had the paint burnt off after only a few tows. Do you have some data, service manual, bulletin or just found a mistake? If the fluid goes bad or gets low, it can't do its job as well which can lead to damaging the gears inside the transfer case. Not sure it matters but it's the G80 with 3.73 gears. Some say that only the HD models come with the 11.50" rear end. Starting Price (MSRP) Chevrolet Silverado 2500HD LT For Sale. Synthetic blend oils may require more frequent changes to keep your engine clean. Never had a problem running empty with the heavier oil in the old truck and it didnt seem to hurt the MPG either. DIY car service is not as difficult as it looks like and it might save you thousands of dollars per year. Engine: 6.0L V8 Gas. What Is a Fuel Filter (and What Does It Do)? (lbs), Fifth Wheel Hitch - Max Trailer Wt. Tag on the differential suggest a level to maintain- 15 to 40 mm below fill hole (not real easy to determine). All our products are backed by science, giving you noticeable results. The number before the W represents the oil thickness in cold weather, and the number after is the thickness in hot weather. The What is Wrong with my 4WD? In freezing temperatures, switch from Everyday Diesel Treatment toDiesel Winter Anti-Gelfor protection against fuel gelling. In this video we show how to service the rear differential fluid on a Chevrolet 2500HD. '98 Jeep XJ. For example, turbocharger bearingsare known to fall victim to stiction buildup. I just checked that again, at the time that I posted that, that was what was listed in the Online Application Guide. 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. 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.. Our 6.6L LB7 Duramax Maintenance guide goes over everything you need to know to properly maintain these trucks. Think about the differences between a personal truck and a heavy-duty utility truck. 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. Engine Oil Cooler Yes. 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. I always thought that the dually had the same rear end as the SRW. 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). Chevy Colorado & GMC Canyon. 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 . If the fluid goes bad or gets low, it can't do its job as well which can lead to damaging the gears inside the transfer case. ColoradoFans.com is the best forum for the Chevy Colorado community to discuss the truck's reliability, diesel or transmissions problems and more. For a better experience, please enable JavaScript in your browser before proceeding. Keep in mind that all information here is provided as is without any warranty of any kind. The driveshaft going towards the rear of the truck powers the rear axle, and the driveshaft going to the front powers the front axle. $29.30. 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. The 4WD in the Chevy Silverado consists of many components. Since Duramax engines are diesel-powered, you should look for an oil designed for diesel. You risk blowing a pinion or axle seal by overfilling it like that. (lbs), Wt Distributing Hitch - Max Trailer Wt. JavaScript is disabled. Come join the discussion about performance, lift kits, wheels, tires, modifications, troubleshooting, maintenance, and more! 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: If you have a torque wrench you can torque it to 15 ft-lbs.. Use liquid thread sealer on the bolts threads. The rear differential fluid capacity for the Dodge Ram 1500 is only 3.9 quarts. 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. 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. Don't loose the 4WD in your Chevy Silverado. . It might be even fun and a good thing to do with your kids on a weekend to teach them how basic machinery works. STL, MO. These are our recommended minimum maintenance intervals for vehicles that are driven daily, and in many cases are shorter than the factorys recommendations. The transfer case functions by taking the output from the transmission and splitting that power into two driveshafts. 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. JavaScript is disabled. Now granted these trucks are doing highway speeds and our crawlers arent. Yes, the venting would prevent pressure buildup. the OM also says to change the diff fluid every 15,000mi. DO NOT add Friction Modifier. 3qt should do it! Wheelers? All Rights Reserved. I have a 2008 2500hd duramax I'm looking to make it posi. 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. Dodges use Dana rear ends and front ends. 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. in cold weather fill to 1/2in below the fill hole. It's all may be done by yourself in a mater of a couple of hours. . Changing engine oil, brake fluid, ATF, replacing brake pads, and etc. It. I wonder why the difference? Pinion seals are easy to replace. No, you do not need a friction modifier in your rear differential. BLUE DIAMOND PAO OIL 15W40 BLUE DIAMOND PAO OIL 5W40 GREEN DIAMOND FLEET OIL 15W40 GREEN DIAMOND FLEET OIL 5W40. I was under the impression that differentials have some kind of venting system on them so too much pressure cannot happen. 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*. Run the fill pump tube into the fill hole. just because it is written in the OM, does that mean you should follow it to a T? 1A Auto 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. Dcouvrez en images les prvisions mto compltes du mardi 21 fvrier 2023 Paris et en le-de-France sur BFM Paris le-de-France. The automatic How to Replace Power Steering Pump However, one area that can be easily forgotten about when servicing this vehicle is the rear differential. Do not use other viscosity such as SAE 10W-30, SAE 10W-40, or SAE 20W-50. If you have questions, give our team a call at 800-341-6516. This article applies to the Chevrolet Silverado 1500 (2014-present). 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. VehicleHistory.com Thinner oils run better in the winter, so a lower number before the W would likely be better for working in cold winters. does not research or authenticate any of the Answers provided. If I do a burnout only the right wheel spins when the left tries to it stops it. This article applies to the Chevrolet Silverado 1500 (2007-2013). A forum community dedicated to all General Motors truck owners and enthusiasts. We give you service schedules for normal and severe use, fluid capacities, and a complete list of recommended filters, engine oils, and fluids to use. Consider the following factors when selecting your oil, and make sure to research manufacturer recommendations. 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. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Your rear is a 10 bolt, 30 spline, 8.625". 328 Reaction score 175 Anyone know the fluid capacity for the 10 bolt 8.5" rear differential in 2008 Tahoe? Note that CJ-4 and CK-4 oil categories are backwards compatible, they supersede the older CI-4 and CH-4 specifications. 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. Solves the problem that these T-cases have with vaporizing the ATF and expelling it from the vent hose. 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. The cover is bolted on with twelve 10mm bolts and the plug can be opened using a 3/8" drive. The 4WD system is Why is My 4WD Selector Light On? When looking for the best oil for Duramax engines, its important to consider if the additives do what you need them to. My owners manual does not tell capacity. Vehicle History's team of automotive experts brings you the most accurate and up-to-date used car information. JavaScript is disabled. They're very powerful and capable, but they're also very vulnerable to poor fuel quality. Get something good. Changing the air filter on a 2014 Chevy 2500 with a 6.6L LML Duramax with Frantz oil bypass filter system. Failure to use such lubricants will result in ash build-up in the DPF and a potentially expensive repair bill. It's free! '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. It may help you decide what you want to use. Changed the fluid in the rear differential. This article applies to Common Problems '65 Dodge Polara 880 Convertible 383 hp Automatic. When the vehicle is new, follow the maintenance schedule to the letter, record it in your owners manual and keep all receipts to protect the warranty and resale value. Duramax 6.6 Fluid Capacity & Torq Specs LB7/LLY/LBZ/LMM. . VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. At some point, something will go wrong. Gilead, OH 43338. SG in it and called it good. 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. (lbs), Compare 2008 Chevrolet Silverado 2500HD Different Trims . Greetings, I have lurked these pages for a long time, but don't post much. What is the procedure for replacing the pinion seal on the front differential of a . 6.6L Turbo V8 Diesel. I do a lot of towing with mine. 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. If it does by chance, lesson learned. For the 2009 it shows two diff one is the 11.50" The other is that 9.50-10.50" which is the only one that showed up on the 2005 look up. SOLD: 2010 2500 Mega 4x4 SLT, 68rfe, 35x12.50x18 Toyo OC M/Ts. The Fora platform includes forum software by XenForo. You no longer need to do a tune-up every six monthsor change the oil every three months, but regular service and check-ups are still essential to your vehicles longevity. I fill em with 75x140 amsoil in the rear and 75x90 in the front. MAG-HYTEC heavy duty differential covers and transmission pans provide increased lubricant and cooling capacity for hard working recreation and service vehicles . Currently running RGT 5w30 in the engine, will be switching to . #1. You can use our engine oils in conjunction with our other products likeStiction EliminatorandDiesel Extremeto offer the highest level of performance all year. For a better experience, please enable JavaScript in your browser before proceeding. 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. 2023 Vehicle History Inc. All Rights Reserved. The components in the FR3 friction reducer help extend youroils stability,performance,film strength and, most importantly,friction reduction. Let the truck cool off completely first; you don't want to burn yourself on hot fluid. The Car Connection is published by, Transmission, 6-speed automatic, heavy-duty, electronically controlled with overdrive and tow/haul mode (Requires (LY6) Vortec 6.0L V8 SFI engine), Dead Weight Hitch - Max Trailer Wt. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Changing the engine oil and filter on a 2014 Chevy 2500 with a 6.6L LML Duramax with Frantz oil bypass filter system. Be prepared as the fluid will rush out quickly. I put fluid in until it ran out the fill plug. 2011, 2012, 2013, 2014, 2015, 2016 GM (Chevy and GMC) trucks. I bought the 2 1 gallon gallon jugs and i was able to fill both with plenty of left over.. 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. All our oils and oil additives are CK-4 compliant. 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'm not shure what weight goes in the front and the rear of the 2008 2500 6.7L 4x4:S: 2008 2500 Big Horn 6.7L, Banks Ram Air Intake, 5" Turbo Back SST, EGR Delete, Bully Dog PMT, Flow Pro DPF Reset, Beast. When I do a look up on the Amsoil sight for an '05 3500 it didn't show the 11.50" rear end. Use Shift Restore as a preventative maintenance product or to solve existing issues with the transmission. Driven Racing Oil Limited Slip Differential Fluid Additive (50054) 0. Trans Mfr CD 1000/MW7 and 1000/M74 New Venture 236 NP8, New Venture 246-NP8, 50/50 mixture of DEX-COOL coolant and demineralized water. JavaScript is disabled. that seems a little excessive, so not sure. 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. When it is very cold, below 0 Deg. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. I know the front is 2 qts, but 4.4 pints is only a little over 2 qts, which is almost half of the 4 qts that gmclbz is saying. 3975 Morrow Meadows Drive 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. I got a 97 k1500. 2CarPros The front I'm pretty sure is a 8.25" differential. FR3 Friction Reduceris an oil additiveand infused in all Hot Shots Secret oils that increaseslubricationandreduces wearontheoil. I figured the fluid is cheap and it gives me a chance to take a look at the gears first hand. If your oil tends to create soot and other types of buildup, you may need to change the oil more often than recommended. 1A Auto Parts 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. Fully synthetic oils require fewer oil changes, but youre often paying more for the quality. This may not seem like much, but if you are hauling a lot of weight, it can add up quickly. Use engine oils that have one of these designations: CI 4 or CH 4 for DURAMAX diesel engines. Think of it being the same as how much you would tighten the engine oil drain plug. Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more! :S: 2008 2500 Big Horn 6.7L, Banks Ram Air Intake, 5" Turbo Back SST, EGR Delete, Bully Dog PMT, Flow Pro DPF Reset, Beast Silvershark TRX4 Registered Joined Nov 8, 2010 58 Posts Want to make it last? Are you getting an arm workout while driving your Chevy Silverado? If you have a different type of Duramax, check out our other maintenance guides. Just like your transmission, the transfer case requires fluid for both lubrication and cooling. The following are signs you have the wrong oil for your Duramax engine: Ourfully synthetic oilsuse unique molecular structures proven to improve engine performance. Greasing front end on a 2014 Chevy 2500 with a 6.6L LML Duramax with How to Service a Transmission on a 2014 Chevy 2500 6.6L LML Duramax. Chevrolet recommendations and specifications for oil and fluid for 2003 Silverado 2500 HD. AAM 11.5 w/ 3.73's and a G80 locker all come standard on a Duramax. 2 pints = 1 qt. When adding, be sure to fill to the approximate level. All engines equipped with a diesel particulate filter (DPF) require a low ash engine oil meeting CJ-4 or CK-4 specifications. 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. The Questions and Answers on this page are the statements and opinions of their respective authors and not VehicleHistory.com. With all the different types of additives out there, you want to understand your priorities before making a decision. 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. Once the fluid stops dripping out, you can re-install the drain plug. Many people debate whether synthetic or non-synthetic oils are the way to go, when it really comes down to additives. I put about 3.5 qts. 2013 Chevrolet Silverado 2500HD Work Truck (WT) Full Specs. . 2023 Vehicle History Inc. All Rights Reserved. Whetheryoure looking for a solution for existing stictionorneed apreventative,ourStiction Eliminatorwill clear your engine and keep it clean. 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. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. This article applies to the Chevrolet Silverado 1500 (2014-present). Once it's dry, you can re-install it using the 18mm socket. Add coolant as necessary to bring to appropriate level. On top of engine age and performance needs, its essential to use the right oil for your engine power. Tag on the differential suggest a level to maintain- 15 to 40 mm below fill hole (not real easy to determine). Test loosening the fill plug first using the 18mm socket; sometimes these get stuck. Apply the white Loctite to the fill plug. The official recommendation for oil changes in Duramax engines is every 7,500 miles oras prompted by vehicle information display. 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). year to help you gain confidence about one of your largest purchase decisions. 31 people found this helpful. There's a couple different recommended transfer case fluids depending on your transmission and transfer case combo. The rear differential fluid capacity in a 2006 chevy 2500 hd is 3 quarts. I wanted to change my oil in minebut idk the ring gear and didnt wanna tear her apart n be screwed if i aint got the right amount, A quick reminder when you fill your diff, front or rear, back up make sure the vehicle is, [SIGPIC]"If it ain't one thing, it's a mother******g nother"[/SIGPIC], I bent a piece of wire at right angle and made one end 30 mm long and marked it at 5 mm increments and made the other end about four inches long so as not to accidently lose it into the hole. Go here and double check: http://www.ringpinion.com/ Ssuper tech full synthetic gear lubricant 75w-90 is the recommended type of fluid to use in this vehicle and is about 20 a bottle. Just put in synthetic 75w-90 oil. 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. The question of synthetic oil should still play a role in your decision-making. I think I used almost 3 quarts, 2+ each. Create new posts and participate in discussions. With FR3 nano lubricant technology, our engine oils seamlessly fill in the smallest imperfections on engine components to create smooth operation for thousands of miles. By logging into your account, you agree to our, Current Chevy Trucks, SUV's, Crossovers & Vans, Do Not Sell or Share My Personal Information. in your garage to make future searches easy. To rub some more salt in the wound it's not a Dana axle, it's AAM 11.5". Changing the fuel filter on a 2014 Chevy 2500 with a 6.6L LML Duramax. Come join the discussion about performance, lift kits, wheels, tires, modifications, troubleshooting, maintenance, and more! 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. Before doing any DIY service please check your insurance policy and Chevrolet warranty policy for your region. It take 2 qts in the front and about 4 in the rear. 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 -. Even modern cars stuffed with electronics can be serviced in your garage or even in your driveway. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Maybe that is why they want it changed so often. Before this thread gets too far off topic: I never seen a diff go bad from too much fluid. Copyright 2023. FR3 can reduce wear rates by 43%. 2000 GMC YUKON SLT, 5.3L tow pkg, G80 rear/w 3.73 gear. The esters also increase the rubber seals lubrication and swell the seal to prevent oil leaks. I read about the fill height and not how many quarts might be needed for a refresh. You can (and should) replace the fluid in the diffs around 45-50k. I don't think you can even get a different rear than the AAM 11.5". Thisinexpensive preventativeadditive can help you resolve andavoidfuturestiction. Different oils offer different driving capabilities, so its essential to match your oil with the vehicles performance capabilities. 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. Specs & Features Used 2008 Chevrolet Silverado 2500HD Specs & Features More about the 2008 Silverado 2500HD Buy In-Store Buy Online See Edmunds pricing data Has Your Car's Value Changed?.