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Filthy Motorsports: Store > GM 8.5" / 8.6"
GM 8.5" and GM 8.6" (8.625")Axle Parts, Gears, and Upgrades

GM 10-Bolt Axle Models:
GM 8.5" 1998 and Older
GM 8.6" 1999 to 2008
GM 8.6" 2009 +

Axle Specifications:
Ring Gear Diameter: 8.500 / 8.625
Diff Cover Bolts: 10 / 12
Ring Gear Bolts: 10
Axle Spline Count: 30 / 28 / 32
Axle Shaft Style: Semi-Floating
C-Clips: Yes
Crush Sleeve Yes
Pinion Nut: 1-1/4" / 32mm
Pinion Support: No
Carrier Breaks: 2.56 / 2.73
Dropout Carrier: No

Torque Specifications:
Pinion Preload New: 14 to 19 in-lbs
Pinion Preload Reused: 6 to 8 in-lbs
Ring Gear Backlash: .006" to .010" (5*)
.003" to .006" (2*)
Ring Gear Bolt Torque: 65 ft-lbs
Carrier Bearing Caps: 60 ft-lbs

Popular Applications:
Chevy Blazer / S10 1977 - 1998 F / R
Chevy Suburban 1977 - 2008 F / R
Chevy Silverado 1999 + Rear
Chevy Tahoe 1999 + Rear
Chevy Avalanche 2002 + Rear
Chevy C10 / C25 1979 +
Rear
Chevy Camaro 2010 + Rear
Cadillac Escalade 1999 + Rear
GMC K5 / K25 1977 - 1999 F / R
GMC Yukon 1999 + Rear
Hummer H3 2005 - 2010 Rear
GMC Sierra 1999 + Rear
GMC Envoy 2002 - 2009 Rear

Axle Variations:
GM 8.5" 10 Bolt 1998 and Older with Drum Brakes
Small Carrier Bearings
Front and Rear Applications
28 / 30 / 31 Spline Axle Shafts.
Some older GM 8.5" front axles have a slightly different differential cover design with one bolt offset. Standard differential covers will still fit these axles when that one bolt is not used (or re-drilled).
GM 8.6" 10 Bolt 1999 and Newer with Disc Brakes
Large Carrier Bearings
Rear Solid and IRS Applications
30 / 32 (IRS) Spline Axle Shafts
GM 8.6" differentials can be installed in a GM 8.5" axle with the proper conversion bearings. GM 8.6" gears will fit GM 8.5" axles and as such have become the universal aftermarket size for both.

Axle Images:

Axle Details
The GM 8.5" 10 Bolt axle, also known as the GM 8.6" axle or GM 10-Bolt, is available in many front and rear axle applications including both solid axle and IFS / IRS configurations. While the GM 8.5" axle features an 8.5" diameter ring gear and the GM 8.6" axle uses a slightly larger 8.625" diameter ring gear, almost everything within the axles is completely interchangeable.

*Older "5-Cut" face milled gears have different set up specifications than the newer "2-Cut" face hobbed gears.

Note: This axle has a Carrier Break and gear changes may require a different carrier or thick gears.
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OX Locker images
GM 8.5" OX Locker | 28 Spline (2.73 & Up)
Price: $999.00

OX Lockers have a unique cable shifted locking mechanism that makes them extremely tough, durable, reliable, and easy to use. A heavy duty differential cover is included and the mechanical or air operated shifters (sold separately) make for an easy installation in any vehicle. more info
OX Locker images
GM 8.5" / 8.6" OX Locker | 30 Spline (2.73 & Up)
Price: $999.00

OX Lockers have a unique cable shifted locking mechanism that makes them extremely tough, durable, reliable, and easy to use. A heavy duty differential cover is included and the mechanical or air operated shifters (sold separately) make for an easy installation in any vehicle. more info
Eaton E-Locker
GM 8.5" / 8.6" Eaton E-Locker | 30 Spline (2.73 & Up)
Price: $1,182.99

Eaton E-Lockers use a proprietary electromagnetic locking mechanism to switch between an open carrier and a fully locked differential. They are specifically designed for use in 4x4 vehicles and feature heavy duty components for maximum durability and reliability. more info
Eaton Detroit TrueTrac
GM 8.5" Eaton TrueTrac | 28 Spline C-Clip (2.73 & Up)
Price: $634.99

Detroit Truetrac Lockers are maintenance free, fully mechanical, Torsen style limited slip differentials with helical gears instead of clutch packs (which wear out over time) to provide constant torque to both wheels while still allowing for smooth turns on pavement. more info
Eaton Detroit TrueTrac
GM 8.5" Eaton TrueTrac | 28 Spline (2.73 & Up)
Price: $634.99

Detroit Truetrac Lockers are maintenance free, fully mechanical, Torsen style limited slip differentials with helical gears instead of clutch packs (which wear out over time) to provide constant torque to both wheels while still allowing for smooth turns on pavement. more info
Eaton Detroit TrueTrac
GM 8.5" / 8.6" Eaton TrueTrac | 30 Spline C-Clip (2.73 & Up)
Price: $629.99

Detroit Truetrac Lockers are maintenance free, fully mechanical, Torsen style limited slip differentials with helical gears instead of clutch packs (which wear out over time) to provide constant torque to both wheels while still allowing for smooth turns on pavement. more info
Eaton Detroit TrueTrac
GM 8.5" / 8.6" Eaton TrueTrac | 30 Spline C-Clip (2.73 & Up) | Cryo Treated
Price: $729.95

Cryogenically Treated TrueTrac Differentials have improved strength, durability, and wear resistance over standard units. They are maintenance free, fully mechanical, Torsen style limited slip differentials with helical gears that provide torque to both wheels at all times. more info
Detroit Locker
GM 8.5" / 8.6" Detroit Locker | 30 Spline (2.73 & Up)
Price: $987.99

Detroit Lockers have a legendary reputation with off-roaders and feature a heavy duty, efficient, and effective design that offers 100% traction to both wheels while still allowing for wheel speed differentiation for easy turning on the street and other high-traction surfaces. more info
Yukon Master Ring and Pinion Install Kit
GM 8.6" Yukon Master Overhaul Kit | '99 to '08
Price: $297.89

Yukon master overhaul kits include everything you need to rebuild your differential, install new ring and pinion gears or add a differential locker. Every component is of the highest quality and engineered specifically for your application to ensure accurate set up. more info
Yukon Master Ring and Pinion Install Kit
GM 8.6" Yukon Master Overhaul Kit | '09 and Newer
Price: $316.89

Yukon master overhaul kits include everything you need to rebuild your differential, install new ring and pinion gears or add a differential locker. Every component is of the highest quality and engineered specifically for your application to ensure accurate set up. more info
Yukon Master Ring and Pinion Install Kit
GM 8.5" Yukon Master Overhaul Kit | Rear
Price: $217.89

Yukon master overhaul kits include everything you need to rebuild your differential, install new ring and pinion gears or add a differential locker. Every component is of the highest quality and engineered specifically for your application to ensure accurate set up. more info
Yukon Master Ring and Pinion Install Kit
GM 8.5" Yukon Master Overhaul Kit | Front
Price: $279.89

Yukon master overhaul kits include everything you need to rebuild your differential, install new ring and pinion gears or add a differential locker. Every component is of the highest quality and engineered specifically for your application to ensure accurate set up. more info
Yukon Master Ring and Pinion Install Kit
GM 8.5" Yukon Master Overhaul Kit | HD Rear (for Eaton Lockers)
Price: $297.89

Yukon master overhaul kits include everything you need to rebuild your differential, install new ring and pinion gears or add a differential locker. Every component is of the highest quality and engineered specifically for your application to ensure accurate set up. more info
Yukon Master Ring and Pinion Install Kit
GM 8.5" Yukon Master Overhaul Kit | HD Front (for Eaton Lockers)
Price: $297.89

Yukon master overhaul kits include everything you need to rebuild your differential, install new ring and pinion gears or add a differential locker. Every component is of the highest quality and engineered specifically for your application to ensure accurate set up. more info
Yukon Minor Ring and Pinion Install Kit
GM 8.5" Yukon Minor Overhaul Kit | Rear
Price: $37.89

Yukon minor overhaul kits include all of the seals, shims, and small parts you need to install new ring and pinion gears or add a differential locker (using the existing bearings). Every part is of the highest quality and made specifically for each axle application. more info
Yukon Minor Ring and Pinion Install Kit
GM 8.5" Yukon Minor Overhaul Kit | Front
Price: $78.89

Yukon minor overhaul kits include all of the seals, shims, and small parts you need to install new ring and pinion gears or add a differential locker (using the existing bearings). Every part is of the highest quality and made specifically for each axle application. more info
Yukon Minor Ring and Pinion Install Kit
GM 8.6" Yukon Minor Overhaul Kit
Price: $73.89

Yukon minor overhaul kits include all of the seals, shims, and small parts you need to install new ring and pinion gears or add a differential locker (using the existing bearings). Every part is of the highest quality and made specifically for each axle application. more info
Yukon Gear and Axle Ring and Pinion Sets
GM 8.5" / 8.6" Yukon Ring and Pinion Gears | 2.73
Price: $486.89

Yukon ring and pinion gears are built for heavy duty applications like racing, towing, and rock crawling. They're machined from the finest materials using modern gear grinding technology to give each set superior strength and the smoothest and most precise finish. more info
Yukon Gear and Axle Ring and Pinion Sets
GM 8.5" / 8.6" Yukon Ring and Pinion Gears | 3.08
Price: $558.89

Yukon ring and pinion gears are built for heavy duty applications like racing, towing, and rock crawling. They're machined from the finest materials using modern gear grinding technology to give each set superior strength and the smoothest and most precise finish. more info
Yukon Gear and Axle Ring and Pinion Sets
GM 8.5" / 8.6" Yukon Ring and Pinion Gears | 3.23
Price: $420.89

Yukon ring and pinion gears are built for heavy duty applications like racing, towing, and rock crawling. They're machined from the finest materials using modern gear grinding technology to give each set superior strength and the smoothest and most precise finish. more info
Yukon Gear and Axle Ring and Pinion Sets
GM 8.5" / 8.6" Yukon Ring and Pinion Gears | 3.42
Price: $420.89

Yukon ring and pinion gears are built for heavy duty applications like racing, towing, and rock crawling. They're machined from the finest materials using modern gear grinding technology to give each set superior strength and the smoothest and most precise finish. more info
Yukon Gear and Axle Ring and Pinion Sets
GM 8.5" / 8.6" Yukon Ring and Pinion Gears | 3.73
Price: $381.89

Yukon ring and pinion gears are built for heavy duty applications like racing, towing, and rock crawling. They're machined from the finest materials using modern gear grinding technology to give each set superior strength and the smoothest and most precise finish. more info
Yukon Gear and Axle Ring and Pinion Sets
GM 8.5" / 8.6" Yukon Ring and Pinion Gears | 4.11
Price: $448.89

Yukon ring and pinion gears are built for heavy duty applications like racing, towing, and rock crawling. They're machined from the finest materials using modern gear grinding technology to give each set superior strength and the smoothest and most precise finish. more info
Yukon Gear and Axle Ring and Pinion Sets
GM 8.5" / 8.6" Yukon Ring and Pinion Gears | 4.56
Price: $420.89

Yukon ring and pinion gears are built for heavy duty applications like racing, towing, and rock crawling. They're machined from the finest materials using modern gear grinding technology to give each set superior strength and the smoothest and most precise finish. more info
Yukon Gear and Axle Ring and Pinion Sets
GM 8.5" / 8.6" Yukon Ring and Pinion Gears | 4.88
Price: $420.89

Yukon ring and pinion gears are built for heavy duty applications like racing, towing, and rock crawling. They're machined from the finest materials using modern gear grinding technology to give each set superior strength and the smoothest and most precise finish. more info
Yukon Gear and Axle Ring and Pinion Sets
GM 8.5" / 8.6" Yukon Ring and Pinion Gears | 5.13
Price: $420.89

Yukon ring and pinion gears are built for heavy duty applications like racing, towing, and rock crawling. They're machined from the finest materials using modern gear grinding technology to give each set superior strength and the smoothest and most precise finish. more info
Yukon Gear and Axle Ring and Pinion Sets
GM 8.5" / 8.6" Yukon Ring and Pinion Gears | 5.38
Price: $420.89

Yukon ring and pinion gears are built for heavy duty applications like racing, towing, and rock crawling. They're machined from the finest materials using modern gear grinding technology to give each set superior strength and the smoothest and most precise finish. more info
Yukon Gear and Axle Ring and Pinion Sets
GM 8.5" / 8.6" Yukon Ring and Pinion Gears | 5.57
Price: $788.89

Yukon ring and pinion gears are built for heavy duty applications like racing, towing, and rock crawling. They're machined from the finest materials using modern gear grinding technology to give each set superior strength and the smoothest and most precise finish. more info
   
 
Don't see the particular axle or drivetrain parts you need? We carry more products and brands than we can make available on this website so give us a call or send us an email and chances are we can get what you need at a great price.