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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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  • QU30103 GM 10 Bolt Differential Cross Shaft Lock Bolt Torque King 4x4 QU30103 GM 10 Bolt Differential Cross Shaft Lock Bolt Torque King 4x4
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    QU30103 GM 10 Bolt Differential Cross Shaft Lock Bolt

    30103
    $3.98
    QU30103 GM 10 Bolt Differential Cross Shaft Lock Bolt is a genuine original equipment bolt with factory applied theadlocking compound. QU30103 is used to secure your differential cross shaft in the differential case. Need More Info? Use the handy Links...
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    $3.98
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  • QU50850 28 Spline Internal Differential Kit for 1977-1989.5 GM 10 Bolt Torque King 4x4 QU50850 28 Spline Internal Differential Kit for 1977-1989.5 GM 10 Bolt Torque King 4x4
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    QU50850 28 Spline Internal Differential Kit for 1977-1989.5 GM 10 Bolt

    50850
    $130.98
    QU50850 28 Spline Internal Differential Kit for 1977-1989.5 GM 10 Bolt front or rear axles.
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    $130.98
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  • YPKGM8.5-P-28 Yukon Dura Grip Positraction Internals, 28 Spline Torque King 4x4
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    YPKGM8.5-P-28 Yukon Dura Grip Positraction Internals, 28 Spline

    453000
    $323.89
    YPKGM8.5-P-28 Yukon Dura Grip Positraction Internals for GM AAM 8.5" rear with 28 spline axles. Fits GM 8.5″ with 28 spline Dura Grip positraction Includes two side gears, four pinion gears, cross pin shaft, roll pin and spider gear thrust washers...
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    $323.89
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  • A560530 Open Differential Case Asm for GM/AAM 8.5, 8.6 Rear Axle
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    A560530 Open Differential Case Asm for GM/AAM 8.5, 8.6 Rear Axle

    560530
    $289.98
    A560530 2.73-up Ratio 30 Spline Open Differential Case Assembly for 1999-2018 GM and AAM 8-1/2" and 8.6" semi-float 10 Bolt Rear Axles.  A560530 has 1.78" hub diameter and can be made to retro fit 1971-1998 8.5, 8.6 30 Spline Rear Axle applications...
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    $289.98
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  • A560875 82-98 8.5, 8.6 GM 10 Bolt Master Diff Bearing Kit
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    A560875 82-98 8.5, 8.6 GM 10 Bolt Master Diff Bearing Kit

    560875
    $111.98
    A560875 GM 10 Bolt Master Differential Bearing and Seal Kit for 1982-1998 GM and AAM 8-1/2" and 8.6" semi-float 10 Bolt Rear Axles.
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    $111.98
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  • A560876 99-08 GM10 Bolt Master Diff Bearing Kit
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    A560876 99-08 GM10 Bolt Master Diff Bearing Kit

    560876
    $119.98
    A560876 GM 10 Bolt Master Differential Bearing and Seal Kit for 1999-2008 GM and AAM 8-1/2" and 8.6" semi-float 10 Bolt Rear Axles.
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    $119.98
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  • MK GM8.5 Yukon Minor Install Kit for GM 8.5" Rear Axles Torque King 4x4
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    MK GM8.5 Yukon Minor Install Kit for GM 8.5" Rear Axles

    450265
    $39.89
    MK GM8.5 Yukon Minor Install Kit for GM 8.5" rear axles. Included are a pinion seal, crush sleeve, complete shim kit, marking compound and brush.
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    $39.89
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  • MK GM8.6 Yukon Minor Install Kit for GM AAM 8.6" Rear Axles Torque King 4x4
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    MK GM8.6 Yukon Minor Install Kit for GM AAM 8.6" Rear Axles

    450269
    $77.89
    MK GM8.6 Yukon Minor Install Kit for GM AAM 8.6" rear axles. Included are a pinion seal, crush sleeve , complete shim kit, marking compound and brush.
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    $77.89
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  • QU50849 30 Spline Internal Differential Parts Kit for 1989.5-1998 GM 10 Bolt Torque King 4x4 QU50849 30 Spline Internal Differential Parts Kit for 1989.5-1998 GM 10 Bolt Torque King 4x4
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    QU50849 30 Spline Internal Differential Parts Kit for 1989.5-1998 GM 10 Bolt

    50849
    $118.98
    QU50849 30 Spline Internal Differential Parts Kit for 1989.5-1998 GM 10 bolt front or rear axles.
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    $118.98
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  • YC G26010481 Yukon 2.73-up Standard Open Carrier Case for GM 8.5" Torque King 4x4
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    YC G26010481 Yukon 2.73-up Standard Open Carrier Case for GM 8.5"

    451384
    $217.89
    YC G26010481 Yukon 2.73-up Standard Open Carrier Case for GM AAM 8.5" rear axles. 2.73 and up ratio only Does not include spider gears Fits GM 8.5″ with 28 or 30 spline axles Standard open carrier case
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    $217.89
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  • YC G26010481-XHD Yukon Extra HD 2.73-up Standard Open Carrier Case Torque King 4x4
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    YC G26010481-XHD Yukon Extra HD 2.73-up Standard Open Carrier Case

    451385
    $262.89
    YC G26010481-XHD Yukon Extra Heavy Duty 2.73-up Standard Open Carrier Case for GM AAM 8.5" rear axles. Uses larger bearings. 2.73 and up ratio only Does not include spider gears Fits GM 8.5″ with 28 or 30 spline axles Has larger carrier carrier...
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    $262.89
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  • YC G40048044 Yukon 30 Spline Standard Open Loaded Carrier Case Torque King 4x4
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    YC G40048044 Yukon 30 Spline Standard Open Loaded Carrier Case

    451393
    $445.89
    YC G40048044 Yukon 30 Spline Standard Open Loaded Carrier Case for GM AAM 8.5" rear axles. Fits GM 8.6″ Standard open carrier case and spiders
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    $445.89
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