Differentials & Parts 1979-1991 GM 8.5R

Shop now for Differentials and Differential Parts for 1979-1991 Chevy and GMC 1/2 ton C and K series trucks with GM (AAM) 8.5" 10 Bolt Semi-Floating Rear Axles. In stock. Quick shipping.

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21 products

QU30103 GM 10 Bolt Differential Cross Shaft Lock Bolt Torque King 4x4
AAM
QU30103 GM 10 Bolt Differential Cross Shaft Lock Bolt Sale price$3.98
QU50850 28 Spline Internal Differential Kit for 1977-1989.5 GM 10 Bolt Torque King 4x4
Torque King
QU50850 28 Spline Internal Differential Kit for 1977-1989.5 GM 10 Bolt Sale price$130.98
QU50849 30 Spline Internal Differential Parts Kit for 1989.5-1998 GM 10 Bolt Torque King 4x4
Torque King
QU50849 30 Spline Internal Differential Parts Kit for 1989.5-1998 GM 10 Bolt Sale price$118.98
YDGGM8.5-3-30-1 Yukon Dura Grip Limited Slip Positraction, 30 Spline Torque King 4x4
Randys R P
YDGGM8.5-3-30-1 Yukon Dura Grip Limited Slip Positraction, 30 Spline Sale price$1,494.00
YPKGM8.5-P-28 Yukon Dura Grip Positraction Internals, 28 Spline Torque King 4x4
Randys R P
YPKGM8.5-P-28 Yukon Dura Grip Positraction Internals, 28 Spline Sale price$498.00
MK GM8.5 Yukon Minor Install Kit for GM 8.5" Rear Axles Torque King 4x4
Randys R P
MK GM8.5 Yukon Minor Install Kit for GM 8.5" Rear Axles Sale price$60.00
YC G26010481 Yukon 2.73-up Standard Open Carrier Case for GM 8.5" Torque King 4x4
Randys R P
YC G26010481 Yukon 2.73-up Standard Open Carrier Case for GM 8.5" Sale price$260.00
YC G26010481-XHD Yukon Extra HD 2.73-up Standard Open Carrier Case Torque King 4x4
Randys R P
YC G26010481-XHD Yukon Extra HD 2.73-up Standard Open Carrier Case Sale price$314.00
YC GM8.5-DG-3 Yukon Replacement Dura Grip Bare Case for GM 8.5" & 8.6" Torque King 4x4
Randys R P
YC GM8.5-DG-3 Yukon Replacement Dura Grip Bare Case for GM 8.5" & 8.6" Sale price$664.00
YP C1-GM8.5-R Chrome Cover for GM AAM 8.5" & 8.6" Rear Axles Torque King 4x4
Randys R P
YP C1-GM8.5-R Chrome Cover for GM AAM 8.5" & 8.6" Rear Axles Sale price$98.00
YP C2-GM8.5-R Finned Polished Aluminum Cover for GM AAM 8.5" & 8.6" Torque King 4x4
Randys R P
YP C2-GM8.5-R Finned Polished Aluminum Cover for GM AAM 8.5" & 8.6" Sale price$460.00
YP C3-GM8.5-R Aluminum Girdle Cover for GM AAM 8.5" & 8.6" Rear Torque King 4x4
Randys R P
YP C3-GM8.5-R Aluminum Girdle Cover for GM AAM 8.5" & 8.6" Rear Sale price$716.00
YP C5-GM8.5 Steel Cover for GM AAM 8.5" & 8.6" Rear Axles Torque King 4x4
Randys R P
YP C5-GM8.5 Steel Cover for GM AAM 8.5" & 8.6" Rear Axles Sale price$106.00
YGLGM8.5-3-30 Yukon Grizzly Locker for GM AAM 8.5" & 8.6", 30 Spline Torque King 4x4
Randys R P
YGLGM8.5-3-30 Yukon Grizzly Locker for GM AAM 8.5" & 8.6", 30 Spline Sale price$1,860.00
YPKGM8.5-P-30 Yukon Dura Grip Positraction Internals, 30 Spline Torque King 4x4
Randys R P
YPKGM8.5-P-30 Yukon Dura Grip Positraction Internals, 30 Spline Sale price$498.00
YPKGM8.5-S-28 Yukon Standard Open Spider Gear Kit, 28 Spline Torque King 4x4
Randys R P
YPKGM8.5-S-28 Yukon Standard Open Spider Gear Kit, 28 Spline Sale price$276.00
YPKGM8.5-S-30 Yukon Standard Open Spider Gear Kit, 30 Spline Torque King 4x4
Randys R P
YPKGM8.5-S-30 Yukon Standard Open Spider Gear Kit, 30 Spline Sale price$276.00
A560530 Open Differential Case Asm for GM/AAM 8.5, 8.6 Rear Axle Torque King 4x4
AAM
A560530 Open Differential Case Asm for GM/AAM 8.5, 8.6 Rear Axle Sale price$289.98
AAM
A560875 82-98 8.5, 8.6 GM 10 Bolt Master Diff Bearing Kit Sale price$111.98
ZIKGM8.5-S-28 USA Standard Gear Standard Spider Gear Set, 28 Spline Torque King 4x4
Randys R P
ZIKGM8.5-S-28 USA Standard Gear Standard Spider Gear Set, 28 Spline Sale price$254.00
ZIKGM8.5-S-30 USA Standard Gear Standard Spider Gear Set, 30 Spline Torque King 4x4
Randys R P
ZIKGM8.5-S-30 USA Standard Gear Standard Spider Gear Set, 30 Spline Sale price$244.00

Shop now for Differentials and Differential Parts for 1979-1991 Chevy and GMC 1/2 ton C and K series trucks with GM (AAM) 8.5" 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.