GM 15209860
Drive Shaft

The first step is to mark all driveline parts relative to both the propeller shaft and axle before disassembly along with the propeller shaft and pinion flange while maintaining exact component positions at removal by using specification and torques. Begin by raising the vehicle. You should mark reference points on the propeller shaft to match with the pinion yoke of the rear axle and the transmission. Cautiously detach the yoke retainers and bolts from the rear axle pinion yoke without striking the yoke ears and without using tools between the Universal Joint and yoke to prevent breaking the injection joints. Use the propeller shaft to slide forward to separate it from the rear axle pinion yoke before sliding it in reverse to disconnect from the transmission and finally pulling out the shaft. Test the Slip Yoke splines to see if a proper grease layer exists before applying grease gm p/n 1237-,7985 or equivalent when needed. Install the propeller shaft inside the transmission keeping the reference marks from removal in alignment before mounting it to the rear axle pinion yoke while aligning these same reference marks. Lower the vehicle before you install yoke retainers along with bolts that need to be tightened to 20 nm (15 ft. Lbs.).