Differentials & Parts 1979-1991 GM 8.5R

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...

QU50850 28 Spline Internal Differential Kit for 1977-1989.5 GM 10 Bolt front or rear axles.

YDGGM8.5-3-30-1 Yukon Dura Grip Limited Slip Positraction for GM AAM 8.5" and 8.6" rear with 30 splines axles. All units are backed by extensive product testing and state-of-the-art software design Fits 2.73 Gear Ratio & Up Fits 8.5″ & 8...

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...

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.

QU50849 30 Spline Internal Differential Parts Kit for 1989.5-1998 GM 10 bolt front or rear axles.

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

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...

YC GM8.5-DG-3 Yukon Replacement Dura Grip Bare Case for GM AAM 8.5" and 8.6" axles. Does not include spider gears Dura Grip positraction carrier case Fits 2.76 and up ratios only Fits GM 8.5″ and 8.6″

YGLGM8.5-3-30 Yukon Grizzly Locker for GM AAM 8.5" and 8.6" rear with 30 spline axles. Fits 2.73-up ratio. 1.781" Large bearing journal design. Requires HD bearings for GM 8.5" differentials. 2.73 and up ratio only 8620 internals for added strength...

YP C1-GM8.5-R Chrome Cover for GM AAM 8.5" and 8.6" rear axles.

YP C2-GM8.5-R Finned Polished Aluminum Cover for GM AAM 8.5" and 8.6" rear axles.