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Home >> Cadillac >> 2021 >> CT4 Sport, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 67 (Rear Drive Axle - Repair Instructions) >> Repair Instructions >> Differential Drive Pinion Gear Seal Replacement (L3B, RWL) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
  1. GM5478759

    Using the DT-52921  Pinion Seal Installer (2) install the differential drive pinion gear seal (1).

  2. Apply a small amount of lubricant to the splines of the rear wheel drive shaft flange. Adhesives, Fluids, Lubricants, and Sealers
  3. GM5478756

    Position the rear wheel drive shaft flange (1) on the pinion shaft, ensuring the alignment marks are aligned.

  4. Using a brass hammer, tap the flange on the drive pinion shaft.
  5. GM5478754

    Prepare the differential carrier pinion threads for installation as follows:

    1. Remove any loose cured adhesive from the external threads of the components using a lint free cloth.
    2. Thread the cleaned components into the internal mating threads and remove to loosen trapped cured adhesive.
    3. Remove loose debris from internal and external threads using compressed air.
    4. Apply liquid thread locking adhesive in a strip along half of the length of the external threads, starting at the tip, just prior to installation. Adhesives, Fluids, Lubricants, and Sealers
    6. CAUTION:

    Refer to Torque-to-Yield Fastener Caution .

    CAUTION:

    Refer to Fastener Caution .

  6. Install the NEW rear wheel drive shaft flange nut (1).
  7. GM5478753

    Using the DT-45012  Holding Fixture (1) and breaker bar with the proper size socket, tighten the NEW rear wheel drive shaft flange nut (2) until the pinion end play is just taken up.

  8. Frequently rotate the pinion while tightening the nut to seat the bearings.
    9. NOTE:

    Compare this measurement with the rotating torque recorded during removal.

  9. Measure the rotating torque of the pinion using an in-pound torque wrench. Continue tightening the front differential drive pinion gear nut (2) until specified rotating torque is obtained, refer to Fastener Specifications .
  10. Once the specified torque is obtained, rotate the pinion several times to ensure the bearings have seated. Recheck the rotating torque and adjust if necessary.
  11. Remove the DT-45012  Holding Fixture (1).
  12. GM5459257

    Position the rear wheel drive shaft (1) onto the rear axle shaft.

  13. GM5342244
    NOTE:

    The rear wheel drive shaft universal joint retainer (1) and washers (2) are serviced as a rear wheel drive shaft universal joint retainer kit consisting of 2 bolts and 1 washer.

    If NEW threaded components are being installed, loosen the adhesive using a metal pick or similar tool before proceeding. If threaded components are reused, prepare the threaded components using the following steps:

    1. Remove any loose cured adhesive from the external threads of the components using a lint free cloth.
    2. Thread the cleaned components into the internal mating threads and remove to loosen trapped cured adhesive.
    3. Remove loose debris from internal and external threads using compressed air.
    4. Apply liquid thread locking adhesive in a strip along half of the length of the external threads, starting at the tip, just prior to installation. Adhesives, Fluids, Lubricants, and Sealers
  14. Install 3 NEW wheel drive shaft washers (2).
    15. CAUTION:

    Refer to Torque-to-Yield Fastener Caution .

  15. Install and tighten the 6 NEW rear wheel drive shaft universal joint retainers (1) in a crisscross pattern. Fastener Specifications
  16. GM5461601

    Position the rear wheel drive shaft (1) onto the rear axle shaft.

  17. GM5457792
    NOTE:

    The rear wheel drive shaft universal joint retainer (1) and washers (2) are serviced as a rear wheel drive shaft universal joint retainer kit consisting of 2 bolts and 1 washer.

    If NEW threaded components are being installed, loosen the adhesive using a metal pick or similar tool before proceeding. If threaded components are reused, prepare the threaded components using the following steps:

    1. Remove any loose cured adhesive from the external threads of the components using a lint free cloth.
    2. Thread the cleaned components into the internal mating threads and remove to loosen trapped cured adhesive.
    3. Remove loose debris from internal and external threads using compressed air.
    4. Apply liquid thread locking adhesive in a strip along half of the length of the external threads, starting at the tip, just prior to installation. Adhesives, Fluids, Lubricants, and Sealers
  18. Install 3 NEW wheel drive shaft washers (2).
    19. CAUTION:

    Refer to Torque-to-Yield Fastener Caution .

  19. Install and tighten the 6 NEW rear wheel drive shaft universal joint retainers (1) in a crisscross pattern. Fastener Specifications
  20. GM5334765

    Apply a thin layer of grease to the transmission output shaft splines (1). Adhesives, Fluids, Lubricants, and Sealers

  21. Loosely install a NEW propeller shaft hub clamp (3) to the propeller shaft joint boot.
  22. Support and secure the propeller shaft (2) to a suitable hydraulic jack stand.
  23. Propeller Shaft (2) - Install
  24. GM5317838

    If NEW threaded components are being installed, loosen the adhesive using a metal pick or similar tool before proceeding. If threaded components are reused, prepare the threaded components using the following steps:

    1. Remove any loose cured adhesive from the external threads of the components using a lint free cloth.
    2. Thread the cleaned components into the internal mating threads and remove to loosen trapped cured adhesive.
    3. Remove loose debris from internal and external threads using compressed air.
    4. Apply liquid thread locking adhesive in a strip along half of the length of the external threads, starting at the tip, just prior to installation. Adhesives, Fluids, Lubricants, and Sealers
  25. Propeller Shaft Bearing Support Bolt (1) - Install and tighten [2x] - Fastener Specifications
  26. Remove the hydraulic jack stand supporting the propeller shaft.
  27. GM5317835

    If NEW threaded components are being installed, loosen the adhesive using a metal pick or similar tool before proceeding. If threaded components are reused, prepare the threaded components using the following steps:

    1. Remove any loose cured adhesive from the external threads of the components using a lint free cloth.
    2. Thread the cleaned components into the internal mating threads and remove to loosen trapped cured adhesive.
    3. Remove loose debris from internal and external threads using compressed air.
    4. Apply liquid thread locking adhesive in a strip along half of the length of the external threads, starting at the tip, just prior to installation. Adhesives, Fluids, Lubricants, and Sealers
  28. Align the relationship marks (2) made on the propeller shaft and the rear differential flange.
  29. Rear Propeller Shaft Bolt (1) - Install [3x]
  30. Rear Propeller Shaft Nut (3) - Loosely install [3x]
  31. Rear Propeller Shaft Bolt (1) - Tighten [3x] - Fastener Specifications
  32. GM5765227

    Ensure that the drive shaft boot is completely seated in the output shaft groove prior to crimping the propeller shaft hub clamp (2).

  33. Using the DT-35910  Drive Axle Seal Clamp Pliers (1), crimp the propeller shaft hub clamp (2) until the final crimped outer diameter (a) is 39 - 41 mm (1.54 - 1.61 in).
  34. GM5427478

    Transmission Mount (2) - Install

    35. NOTE:

    For proper bolt alignment, loosely install all mount bolts prior to tightening to specifications.

  35. Transmission Mount Bolt (1) - Loosely install [2x]
  36. GM5427472

    Transmission Mount Bracket Bolt (1) - Loosely install [4x]

  37. GM5427478

    Transmission Mount Bolt (1) - Tighten [2x] - Fastener Specifications

  38. GM5427472

    Transmission Mount Bracket Bolt (1) - Tighten [4x] - Fastener Specifications

  39. GM5471168

    Floor Panel Number 2 Cross Bar Reinforcement (1) - Install

  40. Floor Panel Number 2 Cross Bar Reinforcement Bolt (2) - Install and tighten [4x] - Fastener Specifications
  41. GM5309833

    Exhaust Intermediate Underbody Heat Shield (2) - Install

  42. Exhaust Heat Shield Bolt (1) - Install and tighten [6x] - Fastener Specifications
  43. GM5394598
    NOTE:

    With the aid of an assistant, install the exhaust system to the vehicle.

    Catalytic Converter Gasket (2) - Install NEW

  44. Exhaust Muffler (1) - Install
  45. GM5399464

    { If equipped } Front Crossmember Brace (2) - Install

  46. { If equipped } Front Crossmember Brace Nut (1) - Install and tighten [4x] - Fastener Specifications
  47. GM5309211

    Exhaust Muffler (1) @ Exhaust Rear Muffler Insulator-Right Side (3) - Install

  48. Exhaust Muffler (1) @ Exhaust Intermediate Pipe Insulator-Right Side (2) - Install
  49. GM5309202

    Exhaust Muffler (1) @ Exhaust Rear Muffler Insulator-Left Side (3) - Install

  50. Exhaust Muffler (1) @ Exhaust Intermediate Pipe Insulator-Left Side (2) - Install
  51. GM5394596

    Electrical Connector (1) @ Exhaust Control Valve Actuator - Connect [2x]

  52. GM5309188

    Catalytic Converter Nut (1) - Install and tighten [2x] - Fastener Specifications

  53. GM5471236

    Floor Panel Reinforcement (1) - Install

  54. Floor Panel Number 4 Cross Bar Reinforcement Bolt (2) - Install and tighten [6x] - Fastener Specifications
  55. GM5400642

    Underbody Rear Air Deflector- Right Side (5) - Install

  56. Underbody Rear Air Deflector Plastic Nut (3) - Install and tighten [3x] - Fastener Specifications
  57. Underbody Rear Air Deflector Bolt (2) - Install and tighten [3x] - Fastener Specifications
  58. Underbody Rear Air Deflector Nut (4) - Install and tighten [2x] - Fastener Specifications
  59. Rear Wheelhouse Liner Screw (1) - Install and tighten - Fastener Specifications
  60. GM5471237

    Rear Tire Front Air Deflector- Right Side (1) - Install

  61. Rear Tire Front Air Deflector Bolt (2) - Install and tighten [2x] - Fastener Specifications
  62. GM5400553

    Underbody Rear Air Deflector- Left Side (5) - Install

  63. Underbody Rear Air Deflector Plastic Nut (2) - Install and tighten [3x] - Fastener Specifications
  64. Underbody Rear Air Deflector Bolt (3) - Install and tighten [3x] - Fastener Specifications
  65. Underbody Rear Air Deflector Nut (4) - Install and tighten [2x] - Fastener Specifications
  66. Rear Wheelhouse Liner Screw (1) - Install and tighten - Fastener Specifications
  67. GM5395705

    Rear Tire Front Air Deflector- Left Side (2) - Install

  68. Rear Tire Front Air Deflector Bolt (1) - Install and tighten [2x] - Fastener Specifications
  69. GM5482906

    Clean any dirt from around the differential carrier fill plug (1).

  70. Differential Carrier Fill Plug (1) - Remove
  71. Fill the differential carrier with axle lubricant.
  72. Check the differential fluid level. It should be even with the bottom of the fill plug hole to no lower than 2 mm (0.08 in) below the opening.
    73. CAUTION:

    Refer to Component Fastener Tightening Caution .

  73. Differential Carrier Fill Plug (1) - Install and tighten - Fastener Specifications
  74. Inspect the exhaust system for leaks.
  75. Remove the support and lower the vehicle.
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