Removal

Except F-Super Duty, Commercial Stripped Chassis and Motor Chassis

NOTE: To maintain driveline balance, mark the relationship of the rear driveshaft yoke and the rear axle companion flange before disassembly.

1. Disconnect the driveshaft from the rear axle companion flange and disconnect the driveshaft slip yoke from the coupling shaft yoke. Wrap tape around the loose bearing caps to prevent the bearings from falling off the universal joint spiders.

2. Remove the two center bearing support (coupling shaft) to the frame crossmember attaching bolts. Remove the coupling shaft assembly from the transmission extension. Install the appropriate tool in the transmission housing to prevent leaking.

3. Clean the male splines of the coupling shaft and driveshaft with a wire brush and a suitable solvent. Remove all hardened grease deposits, dirt or rust. Do not remove the blue plastic coating from male splines. Inspect for worm or galled splines. Remove any nicks, gouges or burrs using a file or emery cloth. If the driveshaft and slip yoke assembly.

4. Using a suitable cleaning fluid, clean all dirt from the slip yoke internal splines and the slip yoke assembly. Carefully inspect the slip yoke splines for wear or evidence of twisting. Check the clearance between the slip yoke splines and the driveshaft splines.

5. Wash all parts except the sealed center bearing and rubber insulator in suitable cleaning fluid. Do not immerse the sealed bearing in the cleaning fluid. Wipe the bearing and rubber insulator clean with a cloth dampened in cleaning fluid.

NOTE: Inspect the slip yoke seal, replace if necessary.

6. Check the center support bearing for wear or rough action by rotating the inner race while holding the outer race. If any wear or roughness is evident, replace the bearing.

7. Examine the rubber insulator for evidence of hardening, cracking, or deterioration. Replace if damaged in any way.