GM Service Manual Online
For 1990-2009 cars only

Special Tools

    • J 24204-2 Bar and Stud Assembly
    • J 36850 Transjel® Lubricant
    • J 44525 Clutch Backing Plate Selector
    • J 47339-1 Piston Return Spring Compressor
    • J 47339-2 Seal Area Protector

For equivalent regional tools, refer to Special Tools.


    Object Number: 1580989  Size: SH
  1. Install the piston seal rings (1, 2) onto the 4-5-6 clutch piston (3).
  2. Lubricate the 4-5-6 clutch piston ID and OD seal rings (1, 2) with J 36850 lubricant .

  3. Object Number: 1217054  Size: SH
  4. Position the 1-2-3-4, 4-5-6 clutch housing (2) on the work table so that the rear of the housing is facing up.
  5. Install the O-ring (1) into the bottom groove on the inner hub of the 1-2-3-4, 4-5-6 clutch housing (2).

  6. Object Number: 1660855  Size: SH
  7. Position the 4-5-6 clutch piston (1) so that the rear of the piston is facing up.
  8. Install the 4-5-6 clutch piston (1) into the 1-2-3-4, 4-5-6 clutch housing (2).
  9. Make sure the 4-5-6 clutch piston (1) is seated on the 1-2-3-4, 4-5-6 clutch housing (2).

  10. Object Number: 1580991  Size: SH
  11. Install the seal ring (1) onto the 1-2-3-4 clutch piston housing (2).
  12. Lubricate the 1-2-3-4 clutch piston housing seal (1) with J 36850 lubricant .

  13. Object Number: 1217056  Size: SH
  14. Align the 4-5-6 clutch piston return spring assembly (2) so that the notches of the spring assemblies are facing and aligned with the tangs of the 4-5-6 clutch piston (4).
  15. Install the 4-5-6 clutch piston return spring assembly (2) into the 4-5-6 clutch piston (4).
  16. Align the 1-2-3-4 clutch piston housing (1) so that the rear of the housing is facing up.
  17. Install the 1-2-3-4 clutch piston housing (1) into the 4-5-6 clutch piston (4).

  18. Object Number: 1580985  Size: SH
  19. Position the 1-2-3-4, 4-5-6 clutch housing (8) on the base of J 24204-2 assembly  (10) so that the rear of the housing is facing up.
  20. Install J 47339-2 protector  (7) onto the shaft of J 24204-2 assembly with the bowl down.
  21. Install the retaining ring (6) onto the surface of J 47339-2 protector  (7).
  22. Install the spring (5) of J 47339-2 protector onto the shaft of J 24204-2 assembly .
  23. Install J 47339-1 compressor J 47339-1 compressor  (4) onto the shaft of J 24204-2 assembly .
  24. Install the J 24204-2 assembly ball bearing (3) and washer (2) onto the shaft of J 24204-2 assembly .
  25. Install the J 24204-2 assembly wing nut (1) onto the shaft of J 24204-2 assembly .
  26. Compress the 4-5-6 clutch piston return spring assembly until the retaining ring groove on the inner hub of the 1-2-3-4, 4-5-6 clutch housing (8) is visible.
  27. Install the retaining ring (6) into the 1-2-3-4, 4-5-6 clutch housing inner hub.
  28. Make sure the retaining ring (6) is seated all around the clutch housing (8).
  29. Remove all J tools.

  30. Object Number: 1217058  Size: SH
  31. Install the 1-2-3-4 clutch piston ID seal ring (1) and the 1-2-3-4 clutch piston OD seal ring (2) onto the 1-2-3-4 clutch piston (3).
  32. Lubricate the seal rings with J 36850 lubricant .

  33. Object Number: 1580984  Size: SH
  34. Position the 1-2-3-4, 4-5-6 clutch housing (4) on the work table so that the rear of the housing is facing up.
  35. Align the 1-2-3-4 clutch piston (3) so that the spring indents are facing up.
  36. Install the 1-2-3-4 clutch piston (3) into the 1-2-3-4 clutch piston housing (4).
  37. Make sure the 1-2-3-4 clutch piston (3) is seated in the 1-2-3-4 clutch piston housing (4).
  38. Align the 1-2-3-4 clutch piston return spring assembly (2) so that the springs are facing and aligned with the spring pockets of 1-2-3-4 clutch piston (3).
  39. Install the 1-2-3-4 clutch piston return spring assembly (2) into the 1-2-3-4 clutch piston (3).
  40. Lubricate the 1-2-3-4 clutch balance piston ID and OD seal area with J 36850 lubricant .
  41. Align the 1-2-3-4 clutch balance piston (1) and position so that the rubber seal is facing down.

  42. Object Number: 1580982  Size: SH
  43. Position the 1-2-3-4, 4-5-6 clutch housing (6) on the base of J 24204-2 assembly  (7) so that the rear of the housing is facing up.
  44. Install J 47339-1 compressor  (4) onto the shaft of J 24204-2 assembly  (7).
  45. Center J 47339-1 compressor  (4) on the 1-2-3-4 clutch balance piston.
  46. Install the J 24204-2 assembly ball bearing (3) and washer (2) onto the shaft of J 24204-2 assembly .
  47. Install the J 24204-2 assembly wing nut (1) on the shaft of J 24204-2 assembly .
  48. Compress the 1-2-3-4 clutch piston return spring assembly until the retaining ring groove on the 1-2-3-4 clutch housing is visible.
  49. Install the retaining ring (5) into the 1-2-3-4 clutch housing.
  50. Remove all of the J tools.

  51. Object Number: 1217064  Size: SH
  52. Install 2 overlap seal rings (4) onto the turbine shaft (3).
  53. Position the turbine shaft (3) on the work table so that the rear of the shaft is facing up.
  54. Align the 1-2-3-4, 4-5-6 clutch housing (2) with the rear of the turbine shaft (3) so that the rear of the clutch housing is facing up.
  55. Install the 1-2-3-4, 4-5-6 clutch housing (2) onto the rear of turbine shaft (3).
  56. Install the retaining ring (1) onto the turbine shaft (3).
  57. Make sure the retaining ring (1) is seated completely around the turbine shaft (3).

  58. Object Number: 1217065  Size: SH
  59. Starting with a 1-2-3-4 clutch steel plate, alternately install 6 1-2-3-4 clutch steel plates (2) and 6 1-2-3-4 clutch fiber plates (1) onto the turbine shaft (3).

  60. Object Number: 1564018  Size: SH

    Note: Special tools J 44525-4 selector tool (4) and J 44525-5 pressure plate (3) are silver plated for easy identification. Do not use the pressure plate and selector tool from the J 44525 selector set if they are not matched in color.

  61. Align J 44525-5 pressure plate (3) with the turbine shaft so that the countersunk holes of J 44525-5 pressure plate (3) are facing up.
  62. Install J 44525-5 pressure plate (3) onto the turbine shaft.
  63. Align J 44525-1 compressor (2) with the turbine shaft so that the inner ridge of J 44525-1 compressor (2) is facing down.
  64. Slide the inner ridge of J 44525-1 compressor (2) into the turbine shaft retaining ring groove.
  65. Align the holes in J 44525-1 compressor (2) with the countersunk holes of J 44525-5 pressure plate (3).
  66. Caution: Refer to Fastener Caution in the Preface section.

  67. Hand install 2 bolts (1) of J 44525 selector into the holes of J 44525-1 compressor (2). Tighten the bolts to 1.8 N·m (16 lb in).

  68. Object Number: 1660858  Size: SH

    Note: The shift quality of the transmission depends heavily upon selecting the correct 1-2-3-4 clutch backing plate.

  69. Perform the following procedure for each tab of J 44525-4 selector tool (1):
  70. 56.1. Place the flat surface, tabbed end of J 44525-4 selector tool (1) onto the top surface of J 44525-5 pressure plate (3).

            Note: At most, 2 of the different tabs will fit into the retaining ring groove.

    56.2. Try to slide the tabbed end of J 44525-4 selector tool (1) into the retaining ring groove on the turbine shaft.
    56.3. If a tab fits into the retaining ring groove, record the 4-digit ID number located on the tab of J 44525-4 selector tool (1). Refer to Selective Components Specifications to determine the correct backing plate.
  71. Select a 1-2-3-4 clutch backing plate as follows:
  72. • If no tab of J 44525-4 selector tool (1) fits into the retaining ring groove, select the 1-2-3-4 clutch backing plate with ID No. 2420.
    • If one or more tabs of J 44525-4 selector tool (1) fit into the retaining ring groove, select the 1-2-3-4 clutch backing plate with an ID No. corresponding to the highest number recorded in the previous step.
  73. Remove J 44525 selector from the turbine shaft.

  74. Object Number: 1217070  Size: SH
  75. Align the selected 1-2-3-4 clutch backing plate (3) so that the beveled edge of the backing plate is facing up.
  76. Install the 1-2-3-4 clutch backing plate (3) onto the turbine shaft (4).
  77. Install the retaining ring (2) onto the turbine shaft (4).
  78. Lift the 1-2-3-4 clutch backing plate (3) and install the spiral retaining ring (1) into the 1-2-3-4 clutch backing plate (3).

  79. Object Number: 1217071  Size: SH

    Caution: Installing the thrust bearing assembly onto the rear of the turbine shaft in the wrong direction may cause permanent damage to the transmission. The blue stripe must be visible.

  80. Align thrust bearing assembly (2) so that the blue stripe on the thrust bearing assembly is facing away from turbine shaft (3).
  81. Install the thrust bearing assembly (2) into the turbine shaft (3).
  82. Make sure the blue stripe on the thrust bearing assembly is visible.
  83. Center the 1-2-3-4 clutch plates (4).
  84. Install the 1-2-3-4 clutch drive hub (1) over the 1-2-3-4 clutch plates (4).
  85. Make sure the 1-2-3-4 clutch drive hub (1) has seated on the thrust bearing assembly (2).

  86. Object Number: 1409527  Size: SH

    Caution: Installing the thrust bearing assembly onto the rear of the 1-2-3-4 drive hub in the wrong direction may cause permanent damage to the transmission. The blue stripe must be visible.

  87. Align the thrust bearing assembly (2) so that the blue stripe on the thrust bearing assembly is facing away from the 1-2-3-4 clutch drive hub (3).
  88. Install the thrust bearing assembly (2) onto the rear of the 1-2-3-4 clutch drive hub (3).
  89. Make sure the blue stripe on the thrust bearing assembly is visible.
  90. Align the 4-5-6 clutch drive hub (1) so that the smaller end is facing up.
  91. Install the 4-5-6 clutch drive hub (1).

  92. Object Number: 1217074  Size: SH
  93. Starting with a 4-5-6 clutch steel plate, alternately install seven 4-5-6 clutch steel plates (2) and six 4-5-6 clutch fiber plates (1) into the 1-2-3-4, 4-5-6 clutch housing.

  94. Object Number: 1217075  Size: SH
  95. Align the tangs of the bronze thrust washer (1) with the holes in the 4-5-6 clutch drive hub (2).
  96. Install the bronze thrust washer (1) onto the 4-5-6 clutch drive hub (2).

  97. Object Number: 1217076  Size: SH
  98. Align the input sun gear (3) so that the gear teeth of the sun gear face the concave face of the input sun gear flange (2).
  99. Install the input sun gear (3) into the input sun gear flange (2).
  100. Make sure the splines are engaged.
  101. Hold the sun gear and align the double wide splines of the input sun gear flange (2) with the double wide spaces on the 1-2-3-4, 4-5-6 clutch housing (4).
  102. Install the input sun gear (3) with the input sun gear flange (2) into the 1-2-3-4, 4-5-6 clutch housing (4).
  103. Install the input sun gear external retaining ring (1) into the 1-2-3-4, 4-5-6 clutch housing (4).
  104. Make sure the retaining ring is seated all the way around the 1-2-3-4, 4-5-6 clutch housing.
  105. Remove tools J 24204-2 assembly and J 43777 .