Drive Pinion Flange

Drive Pinion Flange

Special Tools:

Special Tool(s)
Removal

1. NOTE: The rear wheels and brake drums must be removed to prevent brake drag during drive pinion bearing preload adjustment.

Remove the rear brake drums.





2. Mark the driveshaft flange and pinion flange for correct alignment during installation.





3. Remove the four bolts.





4. CAUTION: The driveshaft centering socket yoke fits tightly on the rear axle pinion flange pilot. Never hammer on the driveshaft or any of its components to disconnect the yoke from the flange. Pry only in the area shown with a suitable tool to disconnect the yoke from the flange.

Using a suitable tool as shown, disconnect the driveshaft centering socket yoke from the rear axle pinion flange.
^ Position the driveshaft out of the way.





5. Install a torque wrench on the pinion nut and record the torque required to maintain rotation of the pinion through several revolutions.





6. CAUTION: After removal of the pinion nut, discard it. A new nut must be used for installation.

Using the special tool, hold the pinion flange and remove the pinion nut.





7. Mark the pinion flange in relation to the drive pinion stem to ensure correct alignment during installation.





8. Using the special tool, remove the pinion flange.

Installation
1. Lubricate the pinion flange splines.
^ Use SAE 75W-140 High Performance Rear Axle Lubricant F1TZ-19580-B or equivalent meeting Ford specification WSL-M2C192-A.





2. NOTE: Disregard the scribe marks if a new pinion flange is being installed.

Align the pinion flange with the drive pinion shaft.





3. Using the special tool, install the pinion flange.





4. Position the new pinion nut.





5. CAUTION: Under no circumstances is the pinion nut to be backed off to reduce preload. If reduced preload is required, a new collapsible spacer and pinion nut must be installed.

CAUTION: Remove the special tool while taking readings with the Nm (inch-pound) torque wrench.

Using the special tool to hold the pinion flange, tighten the pinion nut.
^ Rotate the pinion occasionally to make sure the cone and roller bearings are seating correctly.
^ Install a Nm (inch-pound) torque wrench of the pinion nut.
^ Rotating the pinion through several revolutions, take frequent cone and roller bearing torque preload readings until the original recorded preload reading is obtained.
^ If the original recorded preload is lower than specifications, tighten to the appropriate specification for used bearings. If the preload is higher than specification, tighten the nut to the original reading as recorded.





6. Position the driveshaft, and align the marks on the pinion flange.





7. ACAUTION: The driveshaft centering socket yoke fits tightly on the rear axle pinion flange pilot. To ensure that the yoke seats squarely on the flange. Tighten the bolts evenly in a cross pattern as shown.

Install the bolts.
8. Install the brake drums.