Lincoln 5L3Z-4A376-A Drive Shaft Assembly

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The driveshaft sends engine power to the rear axle through the transmission. At either end of a driveshaft universal joints are used. Although many U-joints are single-cardan type, some 4WD models have double-cardan U-joints. A slip yoke is located at the front of a rear driveshaft, and it connects to a differential by means of a flange yoke. Front driveshafts on 4WD have a slip yoke on each end. The only time a driveshaft may need attention is when the universal joints wear out and need replacing as they are serviceable items which require little maintenance otherwise. Additionally, the driveshaft should be inspected for damage during service procedure and cleaned of any debris that might be present in order for it to function properly again as well.

Turn off air suspension system if equipped. Raise vehicle on jackstands, place transmission in Neutral, block front wheels. Mark relationship between rear driveshaft and differential pinion flange. Remove rear universal joint bolts and center bearing support bracket bolts if applicable. Lower and remove rear driveshaft, protect extension housing. Inspect and replace seals if necessary. Check center bearing for two-piece driveshafts. Install in reverse, align marks, tighten bolts. For front driveshaft on 4WD models, remove shield, mark relationships, remove bolts, lower and remove driveshaft. Inspect and replace seals if needed. Install front end to front axle differential pinion flange, attach rear end to transfer case output shaft companion flange, secure shield. Remove jackstands, lower vehicle, reactivate air suspension if applicable.

Before removing the front shaft, remove the rear one in a two-piece driveshaft. Make sure you jack up the vehicle and secure it well. Match the driveshaft to the mating flange of the rear axle assembly. Unbolt universal joint clamps or drive shaft flange from differential pinion flange. Pry away the universal joint and remove the shaft. Lower rear end of the driveshaft. As a one-piece unit push front end out of the transmission extension housing. Put plastic bag around extension housing. Take off the bag and clean area. Check the oil seal and center support bearing visually. Insert driveshaft into the extension housing of the transmission or transfer case with its front end first. Raise the back end of the driveshaft in position and fix clamps with fasteners.

Two-piece driveshafts consist of two separate sections connected by a center support bearing, while one-piece driveshafts are a single unit. The slip yoke in the driveshaft assembly allows the driveshaft to alter its length during vehicle operation. In two-piece driveshafts, the slip yoke is part of the shaft and is typically found at the front or rear section of the driveshaft.