Drive Pinion Flange and Drive Pinion Seal: Installation
- Inspect the pinion flange seal journal for rust, nicks, and scratches prior to installing the flange. Polish the seal journal with fine crocus cloth, if necessary.
- Lubricate the pinion flange splines.
- Use SAE 80W-90 Premium Rear Axle Lubricant XY-80W90-QL or equivalent meeting Ford specification WSP-M2C197-A.
- Position the pinion flange.
- Using the special tools, install the pinion flange.
- Tighten the nut to set the preload.
- Rotate the drive pinion occasionally to make sure the differential pinion bearings (4630) (4621) seat correctly. Take frequent differential pinion bearing torque preload readings by rotating the drive pinion with a N.m (inch/pound) torque wrench.
- If the preload recorded prior to disassembly is lower than the specification for used bearings, then tighten the nut to specification. If the preload recorded prior to disassembly is higher than the specification for used bearings, then tighten the nut to the original reading as recorded.
- Refer to TORQUE SPECIFICATIONS for used differential pinion bearings.
- Connect the driveshaft. For additional information, refer to DRIVESHAFT .
- Install the rear brake calipers. For additional information, refer to DISC .
- Install the rear wheel and tire assemblies. .
- Lower the vehicle.
NOTE:
Disregard the index marks if installing a new pinion flange.
CAUTION:
Do not under any circumstance loosen the nut to reduce preload. If it is necessary to reduce preload, install a new collapsible spacer (4662) and nut.
CAUTION:
Remove the special tool while taking preload readings with the N.m (inch/pound) torque wrench.
CAUTION:
Align the index marks.
CAUTION:
Install the driveshaft with new bolts. If new bolts are not available, apply Threadlock and Sealer EOAZ-19554 -AA or equivalent meeting Ford specification WSK-M2G351-A5 to the threads of the original bolts.
CAUTION:
The driveshaft centering socket yoke fits tightly on the pinion flange pilot. To make sure that the yoke seats squarely on the flange, tighten the bolts evenly in a cross pattern as shown.