Yukon Gear YCGGM8.5 8.2in & 8.5in Rear Cover Gasket
Engineered by Yukon Gear & Axle, the YCGGM8.5 is a precision rear cover gasket designed for GM 8.2-inch and 8.5-inch 10-bolt differentials. It fits a wide range of Chevrolet, GMC, Buick, and Cadillac vehicles from 1980 to 2017, including popular models like Silverado, Tahoe, Suburban, and Escalade. This gasket provides a reliable seal to prevent gear oil leaks, ensuring smooth operation and protection for differential components during everyday driving or performance upgrades.
Key Features
- Exact Fit Design – Matches OEM specifications for 8.2in and 8.5in GM 10-bolt carriers with 10-bolt cover pattern.
- Premium Material – Composite construction resists heat, oil, and pressure for long-term durability.
- Leak Prevention – Forms a tight seal to keep gear oil contained and maintain proper lubrication.
- Easy Installation – Direct replacement drops in place with no special tools or modifications required.
- Versatile Compatibility – Works on rear axles across trucks, SUVs, and cars from multiple GM brands.
- Quality Construction – Built to Yukon Gear standards for consistent performance in all conditions.
Specifications
| Detail | Value |
|---|---|
| Brand | Yukon Gear & Axle |
| Type | Differential Rear Cover Gasket |
| Compatibility | GM 8.2in / 8.5in 10-bolt rear differentials |
| MPN | YCGGM8.5 |
| Axle Size | 8.2in & 8.5in (8 5/8in bolt circle) |
| Country of Origin | USA |
| Warranty | 1 Year |
| Weight | 0.1 lbs |
| Shipping Dimensions | 10 x 8 x 0.5 inches |
Whats Included
- 1 x 8.2in / 8.5in Rear Cover Gasket (YCGGM8.5)
Product Notes
- Confirm differential size before purchase (8.2in or 8.5in 10-bolt only)
- Recommended during differential cover removal or rebuild
- Clean surfaces thoroughly for best seal
This Part Fits
| Year Range | Make | Model | Notes |
|---|---|---|---|
| 1999-2017 | Chevrolet | Silverado 1500 | LS LT LTZ WT Hybrid Base |
| 1995-2017 | Chevrolet | Tahoe | LS LT LTZ Z71 PPV Premier |
| 2000-2017 | Chevrolet | Suburban 1500 | LS LT LTZ Base |
| 2007-2013 | Chevrolet | Avalanche | LS LT LTZ Black Diamond |
| 1999-2014 | Cadillac | Escalade | Base Luxury Platinum Premium Hybrid |
| 2003-2014 | Cadillac | Escalade ESV | Base Luxury Platinum Premium |
| 1980-1989 | Buick | Electra | Estate Wagon Limited Park Avenue T-Type |
| 1980-1987 | Buick | Regal | Base Limited Sport T-Type GNX Grand National |
| 1994-2005 | Chevrolet | Blazer | Base LS LT Silverado ZR2 Trailblazer Xtreme |
| 1980-1986 | Chevrolet | C10 / K10 | Scottsdale Silverado Custom Cheyenne |
| 1988-1999 | Chevrolet | C1500 / K1500 | Silverado Cheyenne Scottsdale LS Base WT |
| 1996-2014 | Chevrolet | Express 1500 | Base LS LT |
| 2004-2012 | Chevrolet | Colorado | LS LT WT Z71 Sport Base |
| 1980-1986 | Chevrolet | K5 Blazer | Silverado Custom Scottsdale Cheyenne |
| 1994-2004 | Chevrolet | S10 / S10 Blazer | Base LS SS ZR2 Xtreme ZR5 |
| 1980-1996 | Chevrolet | Caprice | Classic Base LS Brougham LTZ Estate |
Why Choose Yukon Gear?
- Full line of differential small parts for complete repairs
- Manufactured to exact tolerances for reliable sealing
- Supports performance builds and maintenance needs
- Backed by decades of gear expertise
Frequently Asked Questions
- Q: Does this gasket fit both 8.2in and 8.5in GM differentials?
- A: Yes, it is designed for both 8.2-inch and 8.5-inch (8 5/8-inch) 10-bolt rear covers.
- Q: Is installation straightforward?
- A: Yes, it is a direct OEM replacement that installs in minutes with basic tools.
- Q: What if my vehicle has a different bolt pattern?
- A: Verify your differential uses the 10-bolt cover pattern common to listed GM models.
Shipping & Handling
- Method: UPS Ground
- Availability: In stock – ships same or next business day
- Packaging: Protective envelope for fast secure delivery
Diff Cover Gaskets
Differential cover gaskets seal the interface between the diff cover and housing, keeping gear oil contained and preventing leaks that can lead to premature bearing wear or total axle failure. Replacing a worn or damaged gasket during a fluid change is straightforward preventive maintenance for any rear-wheel or four-wheel drive vehicle.Popular Diff Cover Gasket TypesOptions include reusable silicone gaskets for Dana 44 and Dana 60 axles, OEM-replacement rubber gaskets for GM 10-bolt and 12-bolt differentials, and RTV-sealant-compatible paper gaskets for Ford 8.8 and 9-inch applications. Billet diff cover upgrades often include a matching formed gasket or integrated seal surface.How do I know when my diff cover gasket needs replacement?Signs include gear oil seeping around the cover perimeter, a low diff fluid level with no other visible leak source, or contamination around the cover bolts. Inspect the gasket surface any time you drop the cover for a fluid change or ring-and-pinion ...
View Diff Cover Gaskets Products
Differentials & Components
Shop differentials and components at Black Ops Auto Works for premium differentials, differential covers, differential gears, locker differentials, limited-slip differentials, install kits, rebuild kits, bushings, seals, yokes, spider gears, and final drive components for cars, trucks, SUVs, and off-road builds. Whether you are upgrading for better traction, stronger power delivery, improved durability, or drivetrain reliability, this collection includes the parts needed for street, towing, racing, and off-road applications. Shop Differentials & Components by Category Browse drivetrain and axle upgrades across popular product categories, including: Differentials Differential covers Differential cover gaskets Differential rebuild kits Differential install kits Differential overhaul kits Differential seal kits Differential bushings Differential mounts Differential braces Differential housings Differential dropouts Differential spider gears Differential yokes Final drive gears Wh...
View Differentials & Components Products
Drivetrain
Shop drivetrain parts and accessories at Black Ops Auto Works for differentials, axles, driveshafts, clutch kits, flywheels, flexplates, shifters, transmission components, ring and pinion gears, differential braces, differential bushings, wheel hubs, wheel bearings, U-joints, valve bodies, transmission coolers, drivetrain mounts, and performance driveline upgrades. This collection is built for street cars, drag cars, track builds, trucks, Jeeps, SUVs, high-horsepower Mopar builds, imports, European performance vehicles, and off-road applications that need stronger power delivery, durability, and reliability. Use this Drivetrain collection to find the right upgrade by vehicle platform, drivetrain layout, transmission type, power level, and product category. Differentials and ring and pinion gears support traction and gearing changes, axles and driveshafts help transfer power, clutch kits and flywheels improve manual transmission performance, transmission coolers and valve bodies supp...
View Drivetrain Products
Engine
This engine parts collection covers oil catch cans, thermostats, thermostat housings, radiator components, coolant accessories, engine covers, fuse box covers, cap covers, throttle bodies, supercharger pulleys, idler pulleys, tensioner pulleys, and engine bay dress-up parts for trucks, SUVs, muscle cars, boosted builds, high-horsepower street cars, and performance vehicles that need better reliability, cooling, airflow, oil control, and under-hood styling. The collection is particularly strong for Dodge Challenger, Charger, Durango, Jeep Grand Cherokee Trackhawk, and Ram TRX platforms running 6.2L Hellcat, 6.4L HEMI, and 5.7L HEMI engines, where oil catch can and cooling upgrades address known OEM weaknesses in the PCV and thermal management systems. Import performance platforms including GM LS-based builds, Chevrolet Camaro, and Corvette applications are also represented through Mishimoto, CSF, and ZPE GripTec product lines. Builders who invest in engine bay organization and reliab...
View Engine Products
Yukon Gear & Axle
Yukon Gear & Axle provides the highest quality aftermarket drivetrain parts in the industry. Yukon products are produced using superior materials and built to tolerances that exceed OE specifications. We do drivetrain right! Yukon manufactures high performance ring & pinions, positractions, lockers, axle upgrades, rebuild kits, hubs, driveshafts, diff covers, and more. Proven at the King of the Hammers and the granite crags and outcrops of Moab, Yukon products are built for abuse so you can gear up and wheel with confidence. At Yukon Gear & Axle we make it our Mission to build quality parts that exceed expectation. It’s that simple! Our in-house engineering group utilizes state-of-the-art software to design product that’s then manufactured in partnership by some of the world’s foremost leaders in OEM manufacturing. After rigorous testing and intense quality inspection, we’re proud to call it Yukon.
View Yukon Gear & Axle Products


