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Home >> Cadillac >> 2021 >> CT4 V, 4WD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 2.7L (L3B) - Repair Instructions - Ct4 (4 Of 6) >> Lower Crankcase Extension Replacement (AWD) >> Removal Procedure

Removal Procedure

NOTE:

Vehicle alignment is not required if the cradle is being lowered or dropped to perform another procedure. This vehicle is equipped with a cradle to body aligning feature: cradle to body through holes or self-aligning pins that are part of the cradle or body. Only align if replacing the cradle with a NEW part and transferring components.

  1. Remove the transmission. Transmission Replacement (All Wheel Drive) , or Transmission Replacement (Rear Wheel Drive)
  2. Lower the drivetrain and front suspension frame assembly. Drivetrain and Front Suspension Cradle Removal and Installation (AWD) , or Drivetrain and Front Suspension Cradle Removal and Installation (RWD)
  3. Drain the Front Differential Carrierfluid. FRONT AXLE LUBRICANT REPLACEMENT
  4. GM5494001Courtesy of GENERAL MOTORS COMPANY

    Retainer (1) - Unclip

  5. GM5407967Courtesy of GENERAL MOTORS COMPANY

    Water Pump Cover Bolt (1) - Remove [3x]

  6. Water Pump Cover (2) - Remove
  7. GM5491651Courtesy of GENERAL MOTORS COMPANY

    Engine Mount Bracket Bolt (1) - Remove and DISCARD [4x]

  8. GM5495033Courtesy of GENERAL MOTORS COMPANY

    Engine Mount Bracket (1) - Remove

  9. GM5517314Courtesy of GENERAL MOTORS COMPANY

    Retainer (1) - Unclip [3x]

  10. Engine Wiring Harness (2) - Reposition away
  11. GM5517315Courtesy of GENERAL MOTORS COMPANY

    Engine Mount Bracket Bolt (1) - Remove and DISCARD [4x]

  12. Engine Mount Bracket (2) - Remove
  13. GM5504544Courtesy of GENERAL MOTORS COMPANY

    Have an assistant apply the brakes.

    14. CAUTION:

    DO NOT use air tools to remove the wheel drive shaft nut. Damage to the wheel drive shaft threads could occur. Use hand tools only.

  14. Front Wheel Drive Shaft Nut (1) - Remove and DISCARD
  15. GM5341097Courtesy of GENERAL MOTORS COMPANY

    Install the DT-45859  Axle Remover (1) to the front wheel hub and secure with 3 wheel nuts (2) hand tightened.

  16. Using the DT-45859  Axle Remover (1), release the front wheel drive half shaft from the front wheel hub.
  17. Remove the 3 wheel nuts (2) and the DT-45859  Axle Remover (1) from the front wheel hub.
  18. GM5341099Courtesy of GENERAL MOTORS COMPANY

    Install the DT-45341  Rear Wheel Drive Shaft Removal Tool (1), GE-47829  Slide Hammer Extension (3) and GE-02619-A  Slide Hammer w/Adapter (4) to the front wheel drive half shaft (2).

  19. Release the front wheel drive half shaft (2) from the front wheel drive intermediate shaft.
  20. Remove the GE-02619-A  Slide Hammer w/Adapter (4), GE-47829  Slide Hammer Extension (3) and DT-45341  Rear Wheel Drive Shaft Removal Tool (1) from the front wheel drive half shaft (2).
  21. GM5341102Courtesy of GENERAL MOTORS COMPANY

    Front Wheel Drive Half Shaft (1) - Remove

  22. GM5344067Courtesy of GENERAL MOTORS COMPANY

    Front Wheel Drive Intermediate Shaft Retaining Ring (1) - Remove and DISCARD

  23. Front Wheel Drive Intermediate Shaft Seal (2) - Remove and DISCARD
  24. GM5344068Courtesy of GENERAL MOTORS COMPANY

    Front Wheel Drive Intermediate Shaft Bracket Bolt (2) - Remove [3x]

    25. NOTE:

    Insert suitable flat edge tool into gaps between bracket and mounting surface and apply alternate and even pressure to gently rock bracket out of mating recess.

  25. Front Wheel Drive Intermediate Shaft Bracket (1) - Remove
    26. NOTE:

    The front wheel drive intermediate shaft bracket bearing is not serviced separately. If the bearing is worn or damaged, replace the front wheel drive intermediate shaft bracket assembly.

  26. Thoroughly clean and inspect the front wheel drive intermediate shaft bracket for damage.
  27. If damaged, replace the front wheel drive intermediate shaft bracket.
  28. GM5502694Courtesy of GENERAL MOTORS COMPANY

    Attach the DT - 44467  Output Shaft Assembly Remover and Installer (1) to the shaft.

  29. Attach the J-6125-1B  Slide Hammer with Adapter (2) to the DT-44467  Output Shaft Assembly Remover and Installer (1).
  30. Use the tools to remove the Front Wheel Drive Intermediate Shaft (3) from the front differential carrier.
  31. Front Wheel Drive Intermediate Shaft (3) - Remove
  32. Front Wheel Drive Intermediate Shaft Retaining Ring (4) - Remove and DISCARD
  33. GM5507500Courtesy of GENERAL MOTORS COMPANY

    Have an assistant apply the brakes.

    34. CAUTION:

    DO NOT use air tools to remove the wheel drive shaft nut. Damage to the wheel drive shaft threads could occur. Use hand tools only.

  34. Front Wheel Drive Shaft Nut (1) - Remove and DISCARD
  35. GM5341517Courtesy of GENERAL MOTORS COMPANY

    Install the DT-45859  Axle Remover (1) to the front wheel hub and secure with 3 wheel nuts (2) hand tightened.

  36. Using the DT-45859  Axle Remover (1), release the front wheel drive half shaft from the front wheel hub.
  37. Remove the 3 wheel nuts (2) and the DT-45859  Axle Remover (1) from the front wheel hub.
  38. GM5341518Courtesy of GENERAL MOTORS COMPANY

    Install the DT-45341  Rear Wheel Drive Shaft Removal Tool (1), GE-47829  Slide Hammer Extension (3) and GE-02619-A  Slide Hammer w/Adapter (4) to the front wheel drive half shaft (2).

  39. Release the front wheel drive half shaft (2) from the front differential carrier.
  40. Remove the GE-02619-A  Slide Hammer w/Adapter (4), GE-47829  Slide Hammer Extension (3) and DT-45341  Rear Wheel Drive Shaft Removal Tool (1) from the front wheel drive half shaft (2).
  41. GM5341521Courtesy of GENERAL MOTORS COMPANY

    Partially remove the front wheel drive half shaft (1) from the front differential carrier.

    42. CAUTION:

    DT-51504 must be installed into the differential output shaft seal prior to removing and installing the wheel drive shaft. Failure to install the DT-51504 as indicated may cause the splines of the wheel drive shaft to damage the differential output seal

  42. Install the DT-51504  Seal Protector (2) into the front axle shaft seal.
  43. GM5341523Courtesy of GENERAL MOTORS COMPANY

    Front Wheel Drive Half Shaft (1) - Remove

  44. GM5507536Courtesy of GENERAL MOTORS COMPANY

    Retaining Ring (2) @ Front Wheel Drive Half Shaft (1) - Remove and DISCARD

  45. GM5458092Courtesy of GENERAL MOTORS COMPANY

    Front Axle Vent Hose (1) - Remove

  46. Using the engine support fixture, carefully lower the engine assembly enough to allow the front differential carrier assembly to be removed through the right wheel opening.
  47. GM5344077Courtesy of GENERAL MOTORS COMPANY

    Position a transmission jack beneath the front differential carrier.

  48. Firmly secure the front differential carrier to the transmission jack.
  49. Front Differential CarrierBolt (1) - Remove [2x]
  50. Front Differential CarrierBolt (2) - Remove
  51. GM5344075Courtesy of GENERAL MOTORS COMPANY

    Front Differential CarrierBolt (1) - Remove

  52. GM5500251Courtesy of GENERAL MOTORS COMPANY

    Front Differential Carrier (1) - Remove

  53. GM5150614Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The timing pin (3) is installed into the flexplate for engine timing procedures, it can be damaged if torque is applied to the flexplate with the timing pin engaged. The pin must be placed in the retracted position before torque is applied to the flexplate.

    Install the EN-52476  Flywheel Lock and Alignment Tool (1) through the starter mounting hole.

  54. GM5517309Courtesy of GENERAL MOTORS COMPANY

    Automatic Transmission Flex Plate Bolt (1) - Remove and DISCARD [8x]

  55. Automatic Transmission Flex Plate (2) - Remove
  56. GM5140979Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Crankshaft Position Sensor Reluctor Ring Caution

    Crankshaft Position Sensor Reluctor Ring (1) - Remove

  57. Flywheel Locating Pin (2) - Remove
  58. GM5511921Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (1) - Disconnect

  59. GM5511922Courtesy of GENERAL MOTORS COMPANY

    Crankshaft Position Sensor Bracket Bolt (1) - Remove

  60. Crankshaft Position Sensor (2) - Remove
  61. GM5004098Courtesy of GENERAL MOTORS COMPANY

    Crankshaft Rear Oil Seal Housing Bolt (1) - Remove [14x]

  62. Crankshaft Rear Oil Seal Housing (2) - Remove and DISCARD
  63. Crankshaft Rear Oil Seal Housing Locating Pin (3) - Remove [2x]
  64. Clean out the crankshaft rear oil seal housing pin bores with low VOC brake clean and dry with shop air.
  65. GM5153596Courtesy of GENERAL MOTORS COMPANY

    Compress the balancer chain tensioner (1).

  66. EN-52593  Chain Tensioner Retention Pin (2) - Install
  67. GM5153597Courtesy of GENERAL MOTORS COMPANY

    Balancer Chain Tensioner Bolt (1) - Remove [2x]

  68. Balancer Chain Tensioner (2) - Remove
  69. GM5153224Courtesy of GENERAL MOTORS COMPANY

    Balancer Shaft Sprocket Bolt (1) - Remove and DISCARD

  70. Balancer Shaft Driven Sprocket (2) - Remove
  71. Balancer Chain (3) - Remove
  72. GM5153495Courtesy of GENERAL MOTORS COMPANY

    Timing Chain Guide Bolt (2) - Remove [2x]

  73. Balancer Chain Guide (3) - Remove
  74. GM5517317Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (1) - Disconnect

  75. Engine Oil Temperature Sensor (2) - Remove
  76. GM5389821Courtesy of GENERAL MOTORS COMPANY

    Lower Oil Pan Bolt (1) - Remove [17x]

    77. NOTE:

    Do not pry on the oil pan to lower crankcase extension as the sealing surface will become damaged.

  77. Locate the four threaded insert jack screw locations on the lower oil pan. Use four lower oil pan bolts in these locations, and tighten the bolts by hand 1 to 2 turns each in a uniform manner, rotating between bolts until the oil pan has full separation from the lower crankcase extension.
  78. Oil Pan (2) - Remove and DISCARD
  79. GM5517356Courtesy of GENERAL MOTORS COMPANY

    Oil Pump Suction Pipe Bolt (1) - Remove

  80. Oil Pump Suction Pipe (2) - Remove
  81. Oil Pump Suction Pipe Gasket (3) - Remove and DISCARD
  82. GM5517355Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (1) - Disconnect

  83. GM5517318Courtesy of GENERAL MOTORS COMPANY

    Oil Filter Adapter Bolt (1) - Remove

  84. Oil Filter Adapter Bolt (2) - Remove [3x]
  85. Oil Filter Adapter (3) - Remove
  86. Engine Oil Cooler Seal (4) - Remove and DISCARD [2x]
  87. GM5932169Courtesy of GENERAL MOTORS COMPANY

    Lower Crankcase Extension Bolt (1) - Remove

  88. Lower Crankcase Extension Bolt (2) - Remove
  89. Lower Crankcase Extension Bolt (3) - Remove
  90. Lower Crankcase Extension Bolt (4) - Remove [8x]
  91. Lower Crankcase Extension Bolt (5) - Remove [3x]
  92. GM5932171Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Use a plastic pry tool when prying case halves apart to prevent damage to the Upper and Lower Crankcase surface. Do not continue to push the pry tool in the crankcase as the Upper and Lower Crankcase halves separate. This may damage the sealing surface.

    Lower Crankcase Extension (1) - Remove

  93. Oil Pan High Pressure Port Seal (2) - Remove and DISCARD
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