GM 15088444 Shaft Assembly, Propeller

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A driveshaft is a tube or pair of tubes that transmits power between the transmission or transfer case on 4WD models and the differential. It is equipped with universal joints at either end and in the center for two-piece driveshafts. On 2WD models, the driveshaft has a splined yoke at the front that allows it to slide back and forth within the transmission, with an oil seal to prevent fluid leakage and dirt entry. For 4WD models, the driveshaft may have a splined yoke or companion flange at the transfer case end, and two-piece driveshafts usually have a slip joint at the front of the rear section. Center bearings support the driveline in two-piece driveshafts, mounted in a rubber cushion on a frame crossmember. The driveshaft requires minimal service, with the universal joints being lubricated for life and replaced if problems arise. It is important to keep the driveshaft clean and inspect it for damage, ensuring the small weights used for balancing are in place and securely attached. Any noise or vibration while driving may indicate a problem with the driveshaft, which can be verified through a road test.

To ensure proper reinstallation.

Universal joints are equipped at either end and in the center for two-piece driveshafts.

Unscrew the collar, separate the driveshaft sections, and install the new bearing and collar.