GM Service Manual Online
For 1990-2009 cars only

Disassemble Procedure

Important: If a bearing is found to be defective, it is not recommended that the bearing be replaced separately. The bearing may only be available in a sub assembly.


    Object Number: 740284  Size: SH
  1. Remove the rubber plug from the transfer case.

  2. Object Number: 662047  Size: SH
  3. Remove the transfer case speed sensor.

  4. Object Number: 165657  Size: SH
  5. Remove the mounting studs (only if damaged).

  6. Object Number: 678215  Size: SH

    Notice: Do not damage the sealing surfaces of the transfer cases or the shafts when prying the seals for removal. Damaging the sealing surface may cause leakage or require replacement of the damaged component.

  7. Remove the input shaft seal.

  8. Object Number: 715670  Size: SH
  9. Remove the rear output shaft seal.

  10. Object Number: 749439  Size: SH

    Notice: Do not damage the sealing surfaces of the transfer cases or the shafts when prying the seals for removal. Damaging the sealing surface may cause leakage or require replacement of the damaged component.

  11. Insert a flat-tipped screw driver in the inner race.
  12. Pry the inner race back.

  13. Object Number: 749435  Size: SH
  14. Insert a small pry bar in the inner race.

  15. Object Number: 749436  Size: SH
  16. Remove the inner race from the seal.

  17. Object Number: 749437  Size: SH
  18. Insert a flat-tipped screw driver or a small pry bar between the lip of the outer lip of the front output shaft seal and the transfer case.

  19. Object Number: 749438  Size: SH
  20. Remove the remaining part of the front output shaft from the transfer case.

  21. Object Number: 740281  Size: SH

    Important: Mark the location of the retaining bolts when removed so that they can be reinstalled in there proper location.

  22. Remove the transfer case bolts.

  23. Object Number: 695581  Size: SH
  24. Insert a flat bladed screw driver in the slot on the left side of the transfer case.

  25. Object Number: 695583  Size: SH
  26. Insert a flat bladed screw driver in the slot on the right side if the transfer case.
  27. With equal pressure, press down on the screw drivers.

  28. Object Number: 649760  Size: SH
  29. Insert a pair of snap ring pliers into the slot.
  30. Using the snap ring pliers, open the outer rear output shaft bearing retaining ring.

  31. Object Number: 740278  Size: SH
  32. Remove the rear case half from the front case half.

  33. Object Number: 729396  Size: SH
  34. Remove the oil pump screen assembly.

  35. Object Number: 729398  Size: SH
  36. Remove the rear output shaft assembly.

  37. Object Number: 729399  Size: SH
  38. Remove the rear output shaft bearing retaining ring.

  39. Object Number: 729521  Size: SH

    Important: When performing the following service procedure, reverse the way the J-22912-01 is normally installed. This will allow greater tool contact area when removing the input shaft bearing

  40. Using the J 22912-B and a press, remove the input gear bearing.

  41. Object Number: 718721  Size: SH

    Important: Use a screw pocket screwdriver to move the oil pump retaining ring down away from the tone wheel. This will ensure that the J-22912-01 will not get caught on the retaining ring.

  42. Using the J 22912-B and a press, remove the tone wheel.

  43. Object Number: 729400  Size: SH
  44. Remove the oil pump retaining ring.

  45. Object Number: 729402  Size: SH
  46. Remove the oil pump assembly.

  47. Object Number: 729405  Size: SH
  48. Using a flat bladed screwdriver, unseat the annulus retaining ring.

  49. Object Number: 729414  Size: SH
  50. Remove the annulus gear retaining ring.

  51. Object Number: 729416  Size: SH
  52. Remove the rear output shaft.

  53. Object Number: 729417  Size: SH
  54. Remove the carrier assembly.

  55. Object Number: 729418  Size: SH
  56. Remove the carrier assembly thrust washer.

  57. Object Number: 729534  Size: SH
  58. Remove the carrier retaining ring.

  59. Object Number: 729419  Size: SH
  60. Remove the sun gear.

  61. Object Number: 729522  Size: SH
  62. Remove the mainshaft.

  63. Object Number: 729423  Size: SH
  64. Remove the needle roller bearing.

  65. Object Number: 729562  Size: SH
  66. Remove the driven sprocket retaining ring.

  67. Object Number: 729532  Size: SH
  68. Remove the drive chain assembly.

  69. Object Number: 729424  Size: SH
  70. Remove the viscous coupling

  71. Object Number: 729425  Size: SH
  72. Using a flat bladed screwdriver, remove the input gear bearing retaining ring from the groove.

  73. Object Number: 729426  Size: SH
  74. Remove the input gear bearing retaining ring.

  75. Object Number: 729518  Size: SH
  76. Remove the input gear assembly.

  77. Object Number: 701641  Size: SH
  78. Remove the input gear bearing retaining ring.

  79. Object Number: 729521  Size: SH
  80. Using a press, remove the input gear bearing.
  81. Using a press, remove the front output shaft assembly.

  82. Object Number: 729522  Size: SH
  83. Remove the front output shaft bearing retaining ring.

  84. Object Number: 729523  Size: SH

    Important: When performing the following service procedure, reverse the way the J-22912-01 is normally installed. This will allow greater tool contact area when removing the front output shaft bearing

  85. Using the J 22912-B and a press, remove the front output shaft bearing.