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Differentials & Parts 1988-2007 GM 8.5R & 8.6R

Shop now for Differentials and Differential Parts for 1988-2007 Chevy and GMC 1/2 ton trucks with GM (AAM) 8.5"/8.6" 10 Bolt Semi-Floating Rear Axles. In stock. Quick shipping.

There have been a several significant differential component changes to the 8.5"/8.6" family of axles over it's long production life. Up until 1989, the diff side gears and axle shafts all had 28 splines. Starting in 1989, The 28 spline configuration was phased out for many applications by a 30 spline setup using the same small hub type differential case. After 1988, you need to ID your diff parts before ordering. Both 28 and 30 spline axles were made until 2000, plus there are both large hub and small hub types and other changes specific to particular years or models.

Differentials & Parts 1988-2007 GM 8.5R & 8.6R

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  • YP C2-GM8.5-R Finned Polished Aluminum Cover for GM AAM 8.5" & 8.6" Torque King 4x4
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    YP C2-GM8.5-R Finned Polished Aluminum Cover for GM AAM 8.5" & 8.6"

    452690
    $256.89
    YP C2-GM8.5-R Finned Polished Aluminum Cover for GM AAM 8.5" and 8.6" rear axles.
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    $256.89
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  • YP C3-GM8.5-R Aluminum Girdle Cover for GM AAM 8.5" & 8.6" Rear Torque King 4x4
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    YP C3-GM8.5-R Aluminum Girdle Cover for GM AAM 8.5" & 8.6" Rear

    452700
    $394.89
    YP C3-GM8.5-R Aluminum Girdle Cover for GM AAM 8.5" and 8.6"* rear axles. *8.6" applications require Metric 8x1.25 cover bolts.
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    $394.89
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  • YP C5-GM8.5 Steel Cover for GM AAM 8.5" & 8.6" Rear Axles Torque King 4x4
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    YP C5-GM8.5 Steel Cover for GM AAM 8.5" & 8.6" Rear Axles

    452726
    $116.89
    YP C5-GM8.5 Steel Cover for GM AAM 8.5" and 8.6" rear axles.
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    $116.89
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  • YPKGM8.5-P-30 Yukon Dura Grip Positraction Internals, 30 Spline Torque King 4x4
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    YPKGM8.5-P-30 Yukon Dura Grip Positraction Internals, 30 Spline

    453001
    $323.89
    YPKGM8.5-P-30 Yukon Dura Grip Positraction Internals for GM AAM 8.5" and 8.6" rear with 30 spline axles. Fits GM GM 8.5″ and 8.6″ Dura Grip positraction with 30 spline axles Includes two side gears, two pinion gears, cross pin shaft, cross...
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    $323.89
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  • YPKGM8.5-S-28 Yukon Standard Open Spider Gear Kit, 28 Spline Torque King 4x4
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    YPKGM8.5-S-28 Yukon Standard Open Spider Gear Kit, 28 Spline

    453002
    $199.89
    YPKGM8.5-S-28 Yukon Standard Open Spider Gear Kit for GM AAM 8.5" rear with 28 spline axles. Fits GM 8.5″ open differential with 28 spline axles Includes two side gears, two pinion gears, cross pin shaft, cross pin bolt and spider gear thrust...
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    $199.89
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  • YPKGM8.5-S-30 Yukon Standard Open Spider Gear Kit, 30 Spline Torque King 4x4
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    YPKGM8.5-S-30 Yukon Standard Open Spider Gear Kit, 30 Spline

    453003
    $199.89
    YPKGM8.5-S-30 Yukon Standard Open Spider Gear Kit for GM AAM 8.5" rear with 30 spline axles. Does not fit 8.6" carriers with casting numbers 1073 or 7875. Both 8.5" & 8.6" carriers were available from 1999-2002. The 8.5" carrier has two large...
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    $199.89
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  • YPKGM8.6-S-30V2 Yukon 10-Bolt Open Spider Gear Set for 00-06, 30 Spline Torque King 4x4
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    YPKGM8.6-S-30V2 Yukon 10-Bolt Open Spider Gear Set for 00-06, 30 Spline

    453004
    $196.89
    YPKGM8.6-S-30V2 Yukon 10-Bolt Open Spider Gear Set for 2000-2006 GM AAM 8.6" rear with 30 spline axles. This spider gear set fits '2000-'2006 Version 2 carriers ONLY, with carrier casting numbers 7875 or 1073. Measures 2.8" across between side gear...
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    $196.89
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  • ZIKGM8.5-S-28 USA Standard Gear Standard Spider Gear Set, 28 Spline Torque King 4x4
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    ZIKGM8.5-S-28 USA Standard Gear Standard Spider Gear Set, 28 Spline

    454486
    $194.89
    ZIKGM8.5-S-28 USA Standard Gear Standard Spider Gear Set for GM AAM 8.5" rear with 28 spline axles. Fits GM 8.5″ 28 spline open differential Includes two side gears, two pinion gears, cross pin shaft, cross pin bolt and spider gear thrust washers...
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    $194.89
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  • ZIKGM8.5-S-30 USA Standard Gear Standard Spider Gear Set, 30 Spline Torque King 4x4
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    ZIKGM8.5-S-30 USA Standard Gear Standard Spider Gear Set, 30 Spline

    454487
    $178.89
    ZIKGM8.5-S-30 USA Standard Gear Standard Spider Gear Set for GM AAM 8.5" rear with 30 spline axles. Does not fit 8.6" carriers with casting numbers 1073 or 7875. Both 8.5" & 8.6" carriers were available from 1999-2002. The 8.5" carrier has two large...
    Qty in Cart: 0
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    $178.89
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  • ZIKGM8.6-S-30V2 USA Standard Gear Standard Spider Gear Set, 00-06 8.6" Torque King 4x4
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    ZIKGM8.6-S-30V2 USA Standard Gear Standard Spider Gear Set, 00-06 8.6"

    454488
    $185.89
    ZIKGM8.6-S-30V2 USA Standard Gear Standard Spider Gear Set for 2000-2006 GM AAM 8.6" rear axles. This spider gear set fits '00-'06 V2 carriers ONLY, with carrier casting numbers 7875 or 1073. Measures 2.8" across between side gear mounting surfaces. ...
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    $185.89
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