Contents Wiring diagrams Section: Differentials & Drive Axles All sections

Rear Axle - C235: Specifications RAM Pickup 2500

Differentials & Drive Axles 11 illustrations ~807 words

SPECIFICATIONS

DESCRIPTIONSPECIFICATION
Axle Ratio3.21, 3.55, 3.92, 4.10
Pinion Flange Runout0.050 mm (0.002 in.)
Ring Gear Diameter235 mm (9.25 in.)
Ring Gear Backlash0.12 - 0.20 mm (0.005 - 0.008 in.)
Pinion Torque To Rotate - New Bearings1.9 - 2.5 N.m (17 - 22 in. lbs.)
Pinion Torque To Rotate - Original Bearings1 - 1.7 N.m (10 - 15 in. lbs.)
Fill Level - From Bottom of Fill Hole3 mm (1/8 in.) ± 3 mm (1/8 in.)

AXLE

DESCRIPTIONN.mFt. Lbs.In. Lbs.
Drain and Fill Plugs7052
Differential Cover Bolts4432
Bearing Cap Bolts136100
Ring Gear Bolts225166
Pinion Nut Minimum285210
Adjuster Lock Screw1197
Backing Plate Bolts10275
Pinion Mate Shaft Lock Screw2619

TORQUE

Scheme 324

Scheme 324: REMOVAL

Scheme 325

Scheme 325

Scheme 326

Scheme 326

Scheme 327

Scheme 327

Scheme 328

Scheme 328

Scheme 329

Scheme 329

Scheme 330

Scheme 330

Scheme 331

Scheme 331

Scheme 332

Scheme 332

Scheme 333

Scheme 333
  1. With vehicle in neutral, position vehicle on hoist. Refer to «Hoisting , Standard Procedure»(ref-457775-S03796115192012030200000) .
  2. Remove the rear wheels.
  3. Disconnect the rear wheel speed sensor electrical connector (3).
  4. Remove the mounting bolt (1) from the sensor (4).
  5. Remove the wheel speed sensor (4) from the brake caliper adapter (2). NOTE: Do not allow brake hose to support caliper assembly. NOTE: Mechanics wire can be used to support the caliper and adapter plate assemblies.
  6. Remove the rear caliper adapter plate bolts (1) from both sides and position the calipers (2) aside.
  7. Loosen clamp (2) and disconnect the axle vent hose (1) from the axle (3).
  8. Remove the rear driveshaft. Refer to «SHAFT, Drive, Rear Light Duty , Removal»(ref-457778-S35273603822012030200000) or «SHAFT, Drive, Rear Heavy Duty , Removal»(ref-457778-S33381732642012030200000) .
  9. Pull the park brake cable spring (1) back. NOTE: A 13mm line wrench can be used to compress the cable tabs. Insert while spring is pulled back and rotate the wrench to compress the tabs.
  10. Compress the cable tabs on each cable end fitting at the brake cable support plate (2).
  11. Remove the park brake cable (3) from the brake cable support plate (2).
  12. Remove the upper park brake cable bolt (1) from the rear axle (2).
  13. Remove the park brake bolt (1) on the upper control arm bracket (2).
  14. Position the park brake cable away from the rear axle.
  15. Remove the stabilizer bar bolts (1) and position the stabilizer bar (2) aside or hang from wire off of the spare tire.
  16. Position a lift under the axle and secure the axle to the lift.
  17. Remove both lower shock absorber bolts (1) and position the shock absorbers (2) away from the axle.
  18. Remove the track bar bolt (1) and position the track bar (2) away from the rear axle.
  19. Remove both the upper control arm to rear axle bolts (1), discard nut and bolt, and position the upper control arms (3) away from the axle.
  20. Remove both the lower control arm to rear axle bolts (2) , discard nut and bolt, and position the lower control arms (4) away from the axle.
  21. Slightly lower the rear axle assembly and remove the rear springs.
  22. Remove the rear axle from the vehicle.

Scheme 334

Scheme 334: INSTALLATION

Note. All suspension torques should be made with the full vehicle weight on the ground being supported by the tires.

  1. Position the spring (3) and isolator (2) on the axle and align into the spring upper pocket.
  2. Carefully raise the rear axle into place.
  3. Position both the lower control arms (4) into the rear axle brackets and loosely install the new bolts (2) with new nuts.
  4. Position both the upper control arms (3) into the rear axle brackets and loosely install the new bolts (1) with new nuts.
  5. Position the rear track bar (2) to the rear axle bracket and loosely install the bolt (1).
  6. Position both the rear shock absorbers (2) to the axle brackets and loosely install the rear shock absorber bolts (1).
  7. Remove the axle lift. NOTE: The stabilizer bar must be centered with equal spacing on both sides.
  8. Position the stabilizer bar (2) to the rear axle and install and tighten the bolts (1) to 65 N.m (48 ft. lbs.).
  9. Position the park brake cable back to the rear axle.
  10. Install the park brake cable bolt (1) on the upper control arm bracket and tighten to 22 N.m (16 ft. lbs.).
  11. Install the upper park brake cable bolt (1) to the rear axle (2) and tighten to 22 N.m (16 ft. lbs.).
  12. Install the rear cable (3) into the tensioner rods behind the rear of the brake assemblies.
  13. Pull the park brake cable springs (1) back until the cable end fitting tabs lock into place. NOTE: Pull on the cable to ensure that it is locked into place.
  14. Install the rear driveshaft. Refer to «SHAFT, Drive, Rear Light Duty , Installation»(ref-457778-S10067659062012030200000) or «SHAFT, Drive, Rear Heavy Duty , Installation»(ref-457778-S28269825252012030200000) .
  15. Connect the axle vent hose (1) and clamp (2) to the axle (3).
  16. Position the calipers (2) back onto the brake rotors and install and tighten the adapter plate bolts (1) to 135 N.m (100 ft.lbs).
  17. Position the rear wheel speed sensors (4) to the brake caliper adapters (2).
  18. Install the mounting bolts (1) to the wheel speed sensor (4) and tighten to 24 N.m (18 ft.lbs).
  19. Connect the rear wheel speed sensor electrical connectors (3).
  20. Install the rear wheels. Refer to «Wheels , Standard Procedure»(ref-457774-S22159730232012030200000) .
  21. Lower the vehicle.
  22. Tighten the upper (1) and lower control arm (2) to 300 N.m (221 ft. lbs.).
  23. Tighten the track bar mounting bolt to 155 N.m (114.5 ft. lbs.).
  24. Tighten shock bolt (1) to 136 N.m (100.5 ft. lbs.).