Yukon ZK GM8.6 Master Overhaul Kit for 1999-2008 GM 8.6" 10-Bolt Differential

Regular price: $122.95
Regular price: ~~$200.00~~
Sale price: $122.95

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Product Specification:

SKU:YUKZK GM8.6

MPN: ZK GM8.6

UPC: 883584370598

Weight: 6.5 lb

Inventory: 2

Type: Differential Overhaul Kits

Vehicle Fitment

1999-2008 Chevrolet Silverado 1500 (All Trims, 2WD/4WD)
2007 Chevrolet Silverado 1500 Classic (2WD/4WD)
2001-2002 Chevrolet Silverado 1500 HD (2WD/4WD)
2000-2008 Chevrolet Suburban 1500 (2WD/4WD)
1999-2008 Chevrolet Tahoe (2WD/4WD)
1999-2005 Chevrolet Blazer (2WD/4WD)
2002-2005 Chevrolet Avalanche 1500 (2WD/4WD)
2007-2008 Chevrolet Avalanche (2WD/4WD)
1999-2008 Chevrolet Express 1500 (RWD)
1999-2004 Chevrolet S10 (2WD/4WD)
2003-2006 Chevrolet SSR (RWD)
1999-2008 GMC Sierra 1500 (All Trims, 2WD/4WD)
2007 GMC Sierra 1500 Classic (2WD/4WD)
2001-2002 GMC Sierra 1500 HD (2WD/4WD)
2000-2008 GMC Yukon (2WD/4WD)
2000-2008 GMC Yukon XL 1500 (2WD/4WD)
2007 GMC Yukon XL 2500 (2WD/4WD)
1999-2005 GMC Jimmy (2WD/4WD)
1999-2008 GMC Savana 1500 (RWD)
1999-2004 GMC Sonoma (2WD/4WD)
2002-2008 GMC Envoy (2WD/4WD)
2002-2006 GMC Envoy XL (2WD/4WD)
2004-2005 GMC Envoy XUV (2WD/4WD)
2002-2008 Cadillac Escalade (2WD/4WD)
2003-2008 Cadillac Escalade ESV (2WD/4WD)
2002-2008 Cadillac Escalade EXT (2WD/4WD)
2004-2007 Buick Rainier (2WD/4WD)
2003-2008 Isuzu Ascender (2WD/4WD)
1999-2000 Isuzu Hombre (2WD/4WD)

Fitment Notes

Fits the GM 8.6" (8.625") 10-bolt rear differential - also known as the GM 8.5" platform with updated larger carrier bearings introduced in 1999
Carrier breaks at 2.56 and numerically lower / 2.73 and numerically higher - verify ratio before ordering to ensure correct carrier shim fitment
For the 2009-and-newer GM 8.6" differential, order ZK GM8.6-B (updated bearing sizes)
This kit does not include axle seals or ring gear bolts on all variants - verify included components for your specific revision

Features

All-in-one master overhaul kit - consolidates every required rebuild component into a single part number
Uses high-quality Koyo bearings and races engineered to meet or exceed OEM specifications
Comprehensive shim kit included for precise pinion depth and carrier preload adjustment
Gear marking compound and brush included for accurate contact pattern verification during setup
Thread locker included to properly torque and secure ring gear bolts per OEM procedure
Crush sleeve included to correctly set pinion bearing preload without reusing a collapsed OEM sleeve
Pinion seal and gasket included to prevent differential fluid leaks after rebuild
Backed by USA Standard Gear's 1-year warranty against manufacturer defects

Specifications

Differential: GM 8.6" (8.625") 10-Bolt Rear
Ring Gear Diameter: 8.5"
Ring Gear Bolts: (10) 7/16" x 20 LH Thread
Cover Bolts: 10
Pinion Diameter: 1.626"
Pinion Spline Count: 30
Carrier Break (Low): 2.56 and numerically lower
Carrier Break (High): 2.73 and numerically higher
Bearing Brand: Koyo
Position: Rear Differential
Warranty: 1 Year against manufacturer defects

Included Components

2x Carrier Bearings and Races
2x Pinion Bearings and Races
1x Pinion Seal
1x Complete Shim Kit (pinion depth and carrier preload shims)
1x Ring Gear Bolt Set
1x Pinion Nut
1x Crush Sleeve
1x Thread Locker
1x Gear Marking Compound with Brush
1x Differential Gasket

Product Description

The Yukon / USA Standard ZK GM8.6 is a complete master overhaul kit designed for a full rebuild of the GM 8.6" (8.625") 10-bolt rear differential found in a wide range of 1999-2008 GM trucks and SUVs. Rather than sourcing individual bearings, seals, shims, and hardware separately, this kit provides everything needed to complete a professional-grade differential overhaul in a single part number. Koyo bearings and races deliver reliable, long-lasting performance that matches or surpasses original factory specs.

The kit includes a comprehensive shim set for dialing in both pinion depth and carrier preload - two of the most critical adjustments in any differential rebuild. Gear marking compound and brush are included to verify the ring-and-pinion contact pattern before final assembly, helping prevent premature wear or noise. The crush sleeve, pinion nut, thread locker, pinion seal, and gasket round out the kit so no additional hardware trips are needed mid-job.

This kit is the correct choice for 1999-2008 applications using the GM 8.6" rear axle - covering vehicles from the Chevrolet Silverado 1500 and Tahoe to the GMC Sierra, Yukon, Cadillac Escalade, and more. Builders working on 2009-and-newer GM 8.6" differentials should use the ZK GM8.6-B, which accommodates updated bearing dimensions. Ideal for gear swaps, locker installs, or worn bearing replacements, the ZK GM8.6 is a trusted go-to for both professional shops and experienced DIY builders.