GM Service Manual Online
For 1990-2009 cars only

Special Tools

    • J-46001 Differential Drive Pinion Holding Tool
    • J-46003 Output Shaft Bearing Locknut Wrench

    Object Number: 2011493  Size: SH
  1. Remove the transfer and transaxle setting stud bolts (1-4).

  2. Object Number: 2011495  Size: SH
  3. Remove the number 2 transfer case plug (1).
  4. Remove the gasket from the number 2 transfer case plug.

  5. Object Number: 2011498  Size: SH
  6. Remove the number 1 transfer case plug (1).
  7. Remove the gasket from the number 1 transfer case plug.

  8. Object Number: 2011500  Size: SH
  9. Remove the transfer drain plug (1).
  10. Remove the gasket from the transfer drain plug.

  11. Object Number: 2011502  Size: SH
  12. Using a screwdriver, remove the transfer case breather plug (1).

  13. Object Number: 2011503  Size: SH
  14. Remove the bolts (1-8).

  15. Object Number: 2011504  Size: SH

    Note: Place the brass bar on the rib part of the case.

  16. Using a brass bar and a hammer, remove the number 1 transfer case cover from the transfer case.

  17. Object Number: 2011508  Size: SH
  18. Remove the bolt (1) and breather oil deflector.

  19. Object Number: 2011509  Size: SH
  20. Remove the bolts (1-3) and transfer dynamic damper from the transfer extension housing sub-assembly.

  21. Object Number: 2011510  Size: SH
  22. Remove the transfer case straight pins (1, 2) from the transfer case.

  23. Object Number: 2028412  Size: SH
  24. Install the transfer case onto the holding fixture through the straight pin locations (1, 2).

  25. Object Number: 2011511  Size: SH
  26. Using a plastic hammer, remove the transfer extension housing dust deflector from the transfer extension housing sub-assembly.

  27. Object Number: 2011514  Size: SH
  28. Using a suitable puller, remove the transfer case rear oil seal from the transfer extension housing sub-assembly.

  29. Object Number: 2011515  Size: SH
  30. Remove the bolts (1-4).

  31. Object Number: 2011518  Size: SH
  32. Using a plastic hammer, remove the transfer extension housing sub-assembly from the transfer case.
  33. Using J-46003 output shaft bearing locknut wrench and a torque wrench, measure the preload of the backlash between the driven pinion and ring gear.
  34. Preload (at Starting)

        • 0.39-0.69 N·m (3.5-6.1 lb in)
        • 0.28-0.50 N·m (2.5-4.4 lb in)

    Object Number: 2011519  Size: SH
  35. Inspect the ring gear backlash.
  36. Inspect the tooth contact between ring gear and drive pinion.
  37. Coat 3 or 4 teeth at 4 different positions on the ring gear with red lead.

  38. Object Number: 2011521  Size: LH
  39. Rotate the ring gear to inspect the tooth pattern.

  40. Object Number: 2011523  Size: SH
  41. Using a suitable puller, remove the transfer case front oil seal from the transfer case.

  42. Object Number: 2011524  Size: SH
  43. Using a suitable puller (1), remove the transfer case front oil seal from the transfer case.

  44. Object Number: 2011526  Size: SH
  45. Remove the bolts (1, 2) and the bearing cap.
  46. Remove the number 1 transfer output shaft spacer.
  47. Remove the number 2 transfer ring gear mounting case washer.

  48. Object Number: 2011530  Size: SH
  49. Remove the transfer ring gear mounting case from the transfer case.

  50. Object Number: 2011536  Size: SH
  51. Remove driven pinion.
  52. Unstake the gear nut using a hammer (1) and chisel.

  53. Object Number: 2011539  Size: SH
  54. Using J-46003 wrench  (2) and J-46001 differential drive pinion holding tool  (1), remove the gear nut.

  55. Object Number: 2011540  Size: SH
  56. Using a press, press out the driven pinion, transfer driven pinion rear bearing (inner race) and transfer pinion bearing spacer.

  57. Object Number: 2011542  Size: SH
  58. Using a press (1), press out the transfer driven pinion front bearing (inner race).

  59. Object Number: 2011544  Size: SH

    Note: Place the brass bar at the 2 positions of the cutouts on the case.

  60. Using a brass bar and a hammer, tap the driven pinion front bearing (outer race) to remove from the case.
  61. Remove the transfer output shaft washer.
  62. Remove the ring gear mounting case bearing right side (outer race) from the transfer ring gear mounting case.
  63. Using a suitable puller, remove the ring gear mounting case bearing right side (inner race) from the transfer ring gear mounting case.
  64. Using a suitable puller, remove the ring gear mounting right side (inner race) RH from the transfer ring gear mounting case.

  65. Object Number: 2011553  Size: SH

    Note: Place the brass bar at the 2 positions of the cutouts on the case.

  66. Using a brass bar and a hammer, tap the 2 positions of the ring gear mounting case bearing left side (outer race) to remove from the transfer case.
  67. Remove the ring gear mounting case plate washer.
  68. Inspect the runout of the ring gear.

  69. Object Number: 2011555  Size: SH
  70. Remove the ring gear.
  71. Put matchmarks on the transfer ring gear mounting case and ring gear.
  72. Remove the bolts (1-10).

  73. Object Number: 2011557  Size: SH

    Note: Do not damage the tooth surface of the ring gear.

  74. Using a plastic hammer, tap on the ring gear to separate it from the transfer ring gear mounting case.
  75. Inspect the transfer ring gear mounting case.

  76. Object Number: 2011713  Size: SH

    Note: Place the brass bar at the 2 positions of the cutouts on the case.

  77. Using a brass bar and a hammer, tap the 2 positions on the driven pinion rear bearing (outer race) before removing it from the transfer case.

  78. Object Number: 2011714  Size: SH
  79. Using J-46003 wrench and a torque wrench, measure the preload of the backlash between the driven pinion (1) and ring gear.
  80. Preload (at Starting)

        • 0.39-0.69 N·m (3.5-6.1 lb in)
        • 0.28-0.50 N·m (2.5-4.4 lb in)
  81. Use a torque wrench with a fulcrum length of 130 mm (5.12 in)
  82. Using J-46003 wrench and a torque wrench, measure the total preload.
  83. Preload (at Starting)

        • 0.25-0.44 N·m (2.2-3.9 lb in)
        • 0.18-0.32 N·m (1.6-2.8 lb in)
  84. Use a torque wrench with a fulcrum length of 130 mm (5.12 in)

  85. Object Number: 2011715  Size: SH

    Note: Check at least 3 positions on the circumference of the ring gear.

  86. Using a dial gauge, check the backlash of the ring gear.
  87. Specification
    Backlash: 0.10-0.18 mm (0.0039-0.007 in)

  88. If the backlash is not within the specification, adjust the side bearing preload or repair as necessary.

  89. Object Number: 2011519  Size: SH
  90. Inspect the tooth contact between the ring gear and drive pinion.
  91. Coat 3 or 4 teeth at the 4 different positions on the ring gear with red lead.

  92. Object Number: 2011521  Size: LH
  93. Rotate the ring gear to inspect the tooth pattern.

  94. Object Number: 2011716  Size: SH
  95. Inspect the runout of the ring gear.
  96. • Place the transfer ring gear mounting case on the V-block.
    • Using a dial gauge, check the runout of the ring gear.

    Specification
    Maximum runout: 0.06 mm (0.0024 in)


    Object Number: 2011717  Size: SH
  97. Inspect the transfer ring gear mounting case.
  98. • Place the transfer ring gear mounting case on the V-block.
    • Using a dial gauge, check the runout of the ring gear.

    Specification
    Maximum runout: 0.04 mm (0.0016 in)