Front Axle - 175 FIA

ADJUSTMENT PINION BEARING PRELOAD

NOTE: Pinion bearing preload is controlled and adjusted by means of a select-thickness spacer sandwiched between the pinion head and tail bearing cones.





1. Remove pinion housing assembly from axle housing.





2. Using a dial-type torque wrench (1), measure pinion housing rotating torque. Rotating torque should be within 130 - 260 Nm (12 - 23 inch lbs.). If rotating torque is below this range, disassemble pinion housing, measure and install a slightly thicker spacer (1), reassemble and reverify. If rotating torque is above this range, disassemble pinion housing, install a slightly thinner spacer, reassemble and reverify rotating torque.





3. Using Tool 6958 (2), remove pinion flange nut.





4. Using Puller 1026 (1), remove pinion flange.





5. Press pinion gear (2) out of housing.





6. Remove pinion bearing preload spacer (1).





7. Measure spacer (1) and correct per rotating torque measurement.





8. Install proper pinion bearing preload spacer (1).





9. Install pinion gear/bearing assembly to housing. Using Tool L-4507 (1), press pinion tail bearing (2) onto shaft until it bottoms.





10. Using Tool L-4507 (1), press on pinion flange (2).





11. Install and torque pinion flange nut to 475 Nm (350 ft. lbs.).





12. Install pinion housing assembly and depth shim to axle assembly
13. Install and torque pinion housing-to-axle housing bolts (1) to 34 Nm (25 ft. lbs.).

DIFFERENTIAL SIDE BEARING PRELOAD

NOTE: Differential side bearing preload is controlled and adjusted by means of select-thickness shims sandwiched between the side bearing cups and the housing/cover.

NOTE: For accurate results, differential side bearing preload must only be measured when the pinion housing assembly is removed from the axle.





1. Remove pinion housing-to-axle housing bolts (1).





2. Remove pinion housing and depth shim (1) from axle assembly.





3. Install Tool C-4995 (1) to differential housing as shown. Measure and record differential rotating torque. Differential rotating torque should be within 190 - 260 Nm (17 - 23 inch lbs.). If rotating torque is below this range, disassemble housing, measure and install slightly thicker preload shims (1). Add thickness equally to both sides. If rotating torque is above this range, disassemble housing, measure and install slightly thinner preload shims. Remove thickness equally from both sides.





4. Remove axle housing cover and differential assembly.





5. Remove differential side bearing cup from axle housing cover. Install Tool 6514 (1) as shown.





6. Remove differential side bearing cup with Tool 6514 (1).





7. Remove side bearing preload shim (1).





8. Measure preload shim (1) to identify for replacement.





9. Install new differential side bearing preload shim (1) into axle housing cover (2).





10. Using Tools C-4171 and D-129 (1), press new side bearing cup into cover until it bottoms. Use suitable cup (3) to support and protect cover.





11. Using Tool 9664 (1) and Slide Hammer C-637 (2) remove differential side bearing (inboard) cup





12. Measure preload shim (1) to identify for replacement.
13. Install new differential side bearing preload shim (1) into axle housing.
14. Using Tools C-4171 and D-145, press differential side bearing cup into housing until it bottoms.





15. Install differential/ring gear assembly (3), new cover O-ring seal (4), and cover (5).
16. Install and torque cover-to-housing bolts to:
^ M10 x 40 - 65 Nm (48 ft. lbs.)
^ M8x25 - 34 Nm (25 ft. lbs.)





17. Re-verify rotating torque measurement. Repeat adjustment procedure until proper rotating torque is obtained.





18. Install pinion housing assembly and depth shim (1). Use new O-ring on housing.





19. Install and torque pinion housing-to-axle housing bolts (1) to 34 Nm (25 ft. lbs.).