Some 2009-2012 F-150 vehicles equipped with a two-piece driveshaft only and built on or before 7/30/2012 may exhibit a rear driveshaft slip/bump concern on light to moderate acceleration from a stop or when coming to a stop with light braking.
It is not necessary to remove the entire driveshaft from the vehicle for this repair.
1. With the truck in neutral, position it on a lift.
2. Index-mark the driveshaft flange and pinion flange to maintain alignment during installation.
3. Mark a straight line down the slip yoke and driveshaft in line with front slip yoke boot clamp head, to help align for reassembly (Figure 1).
4. Remove the front boot clamp only from the center slip yoke and discard.
5. Remove the four driveshaft flange bolts.
6. Using a suitable tool, disconnect the driveshaft flange from the flange pilot.
7. Remove the rear portion of the driveshaft only – leave the slip yoke boot on the rear shaft.
8. Using a dry, clean, lint-free towel, thoroughly clean old grease from the splines on the slip yoke only.
9. If the vehicle is a 4×4, perform the following procedure. If not, proceed to Step 10.
a. Loosen the center bearing bolts and slide the center bearing fully rearward in the slotted mounting holes
b. Torque the center bearing bolts to 48 Nm (35 ft/lbs).
10. Apply an even coat of new grease from the kit to the internal splines of the slip yoke only (Figure 2).
11. Position the new slip yoke boot clamp from the kit over the boot on the spline portion of the driveshaft. Leave clamp loose at this time.
12. Install the rear portion of the driveshaft onto the slip yoke using the alignment marks from Step 3.
13. Apply new threadlock and sealer to the original driveshaft flange bolts.
14. Install the four driveshaft flange bolts using the marks from Step 2 as reference. Torque to 103 Nm (76 ft/lbs).
15. Position the front slip yoke clamp head in-line with the alignment marks from Step 3 and crimp the slip yoke boot clamp.