REMOVAL & INSTALLATION
Dana 60, Dana 70, and Dana F-375
See Figures 1, 2 and 3
A torque wrench capable of at least 300 ft. lbs. (406 Nm) is required for pinion seal installation.
- Raise and support the truck on jackstands.
- Allow the axle to hang freely.
- Matchmark, then disconnect the driveshaft from the front axle.
- Using a holding tool, secure the pinion flange while removing the pinion nut.
- Using a puller, remove the pinion flange.
- Use a puller to remove the seal, or drive the seal out using a pin punch.
- Thoroughly clean the seal bore and make sure that it is not damaged in any way. Coat the sealing edge of the new seal with a small amount of 80W/90 oil and drive the seal into the housing using a seal driver.
- Coat the inside of the pinion flange with clean 80W/90 oil and install the flange onto the pinion shaft.
- Install the nut on the pinion shaft and tighten it to 250-300 ft. lbs. (338-406 Nm).
- Connect the driveshaft.
- Carefully lower the vehicle and remove the jackstands.
A torque wrench capable of at least 225 ft. lbs. (304 Nm) is required for pinion seal installation.
- Raise and safely support the vehicle with jackstands under the frame rails. Allow the axle to drop to the rebound position for working clearance.
- Mark the companion flanges and U-joints for correct reinstallation position.
- Remove the driveshaft use a suitable tool to hold the companion flange. Remove the pinion nut and companion flange.
- Use a slide-hammer and hook or sheet metal screw to remove the oil seal.
- Install a new pinion seal after lubricating the sealing surfaces.
- Use a suitable seal driver. Install the companion flange and pinion nut.
- Tighten the nut to 200-220 ft. lbs. (271-298 Nm).