Subaru 38427AA010 Drive Pinion Shaft

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Remove the wheel cover and loosen the axle shaft nut, then loosen the wheel lug nuts, raise the vehicle and support it securely on jack stands, remove the wheel, disconnect the control arm from the steering knuckle, remove the axle shaft nut, pull the axle shaft assembly out of the steering knuckle, locate the spring pin and remove pin, pry the inner CV joint out of the differential, inspect the inner and outer bearings in the knuckle, use a new spring pin to lock the inner CV joint to the differential stub shaft, tighten the axle shaft nut as securely as you can with the vehicle raised, install the wheel and lug nuts and lower the vehicle to the ground, tighten the axle shaft nut to the torque and the wheel lug nuts to the torque, check the transaxle lubricant level or differential lubricant level, adding as necessary.

The driveshaft transmits power between the transaxle and the rear differential, employing a splined sleeve yoke at the front end and bolted to the differential pinion flange at the rear end. Universal joints are located at either end of the driveshaft, and a third U-joint is installed behind the center bearing, which is a ball-type bearing mounted in a rubber cushion attached to the vehicle floorpan. All models are equipped with a pair of front axle shafts and two rear axle shafts, consisting of an inner and outer ball-and-cage type CV joint connected by an axleshaft, or a tri-pot inner joint and a ball-and-cage outer joint. The inner CV joint can be disassembled, while the axleshaft and outer CV joint are a single assembly and cannot be disassembled. The driveshaft assembly requires very little service, and problems with the driveshaft are usually indicated by a noise or vibration while driving the vehicle.