GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • DT 47522 (DW 260-170) Valve Lifter Attachment
    • DT 47523 (DW 260-180) Valve Lifter
    • DT 47530 (DW 260-250) Spring Pin Installer
    • DT 47531 (DW 260-260) Output Gear Holder
    • DT 47532 (DW 260-270) Output Gear Locknut
    • DT 47533 (DW 260-280) Input Shaft Oil Seal Installer
    • DT 47534 (DW 260-290) Differential Side Oil Seal Installer (Oil Pan Side)
    • DT 47535 (DW 260-300) Differential Front Side Oil Seal Installer

    Object Number: 1343748  Size: SH

    Important: 

       • Do not reuse the oil seal.
       • Apply grease to the lip of the oil seal.
       • The oil seal must be flush with the converter housing surface when installed.

  1. Using DT 47533  (1), install the input shaft oil seal of the converter housing.

  2. Object Number: 1343749  Size: SH

    Important: 

       • Do not reuse the oil seal.
       • Apply grease to the lip of the oil seal.
       • Push the oil seal to the end.

  3. Using DT 47534  (1) and DT 47535  (2), install the differential side oil seal of the converter housing case.

  4. Object Number: 1343750  Size: SH

    Important: Align 2 of the 3 oil inlets (3) on the oil inlets on the oil pan side of the case with the oil inlet cut-out (1) of the output gear bearing support (2).

  5. Install the output gear bearing support (2) with converter housing facing upward.

  6. Object Number: 1348704  Size: SH
  7. Install the output gear.
  8. Hold the output gear using DT 47531  (1) to install the output gear locknut using DT 47532  (2).

  9. Object Number: 1348702  Size: SH

    Important: Be careful not to drop the bearing.

  10. Attach the race-combined bearings to the bottom of the low clutch (1) with petroleum jelly, and install the low clutch drum so that it is engaged with the low & reverse brake plates.

  11. Object Number: 1348701  Size: SH

    Important: 

       • When installing the internal gear, be careful not to catch the Teflon ring of the case side inner race.
       • Be sure to install at the bottom of the low clutch.
       • Be careful not to drop the bearing.

  12. Attach the bearing to the side cover side and the race-combined bearing to the torque converter side of the rear internal gear (1) with petroleum jelly, and install the rear internal gear (1) so that it is engaged with the low clutch plates.

  13. Object Number: 1348699  Size: SH

    Important: Be careful not to drop the bearing race.

  14. Attach the bearing to the side cover side and the race to the engine of the rear carrier assembly (1) with petroleum jelly, and install the rear carrier assembly (1) so that it is engaged with the internal gear.

  15. Object Number: 1348698  Size: SH

    Important: Note the direction of the rear sun gear.

  16. Install the rear sun gear (1) to the rear carrier assembly with the polished face downward.

  17. Object Number: 1343801  Size: SH
  18. Install the low 1-way clutch in the front carrier so that the flange (1) side of the clutch faces the torque converter side.
  19. Ensure that the clutch rotates clockwise smoothly and locks in the counterclockwise direction.

  20. Object Number: 1348696  Size: SH
  21. Attach the bearings to the side cover side and the race-combined bearing to the torque converter side of the front carrier (2) with petroleum jelly, then install the front carrier (2) and the low 1-way clutch (1) as a unit, following the guide of the case.
  22. Important: Be careful not to scratch the 1-way clutch with a screwdriver.

  23. Ensure that the front carrier periphery spline is engaged with that of the low clutch. Ensure that the low 1-way clutch (1) is flush with the top of the front carrier.
  24. Install the snap ring.

  25. Object Number: 1348693  Size: SH
  26. Attach the bearing to the side cover side and the race to the torque converter side of the front sun gear assembly (1) with petroleum jelly, and install the assembly in the front carrier.

  27. Object Number: 1348692  Size: SH
  28. Attach the bearing to the side cover side of the high clutch hub (1) with petroleum jelly, and install the hub (1) in the front sun gear assembly.

  29. Object Number: 1343802  Size: SH
  30. Install the brake band anchor end pin (1) in the case.

  31. Object Number: 1343803  Size: SH
  32. Apply AT fluid to the new O-ring (1) then install them to the band servo piston.

  33. Object Number: 1343756  Size: SH
  34. Before installing the band servo cover, remove any scratches from the case surface with sandpaper (1).

  35. Object Number: 1348694  Size: SH
  36. Insert the band servo piston into the case and push it into the snap ring groove using DT 47523  (1) and DT 47522  (2) then fasten the snap ring (3).
  37. Gently tighten the anchor end nut of the band servo stem shaft so that the air vent pin does not drop.
  38. Fix the spring to the center of the piston with petroleum jelly.

  39. Object Number: 1348689  Size: SH
  40. Attach the bearing to the side cover side of the high clutch assembly (1) with petroleum jelly, and install the high clutch assembly (1) so that it is engaged to the high clutch hub.

  41. Object Number: 1348687  Size: SH
  42. Install the reverse clutch drum (1) so that it is engaged to the high clutch hub.

  43. Object Number: 1343757  Size: SH
  44. Through the anchor end pin and the piston, install the brake band (1) level with the reverse clutch. Then gently tighten the piston.
  45. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1348685  Size: SH
  46. Loosen the anchor end nut as much as possible. Tighten the band servo stem with the specified torque. Then loosen it back by 2.5 turns from that position. Then tighten the anchor end nut with the specified torque while holding the piston stem (1).
  47. Tighten

        • Tighten the band servo stem to 3 N·m (26 lb in).
        • Tighten the anchor end nut to 19 N·m (14 lb ft).

    Object Number: 1348684  Size: SH
  48. Apply AT fluid to the O-ring.
  49. Insert the band servo cover (1) horizontally.
  50. Important: Be sure that the snap ring is entirely in the groove.

  51. Install the snap ring.

  52. Object Number: 1343759  Size: SH
  53. Measure the side the side cover end play and select a suitable thrust washer.
  54. Measure dimension a from the case installation surface of the side cover to the sealing surface of the race bearing.

  55. Object Number: 1343761  Size: SH
  56. Measure dimension b from the side cover installation surface of the case to the top of the high clutch bearing.

  57. Object Number: 1343762  Size: SH
  58. Calculate the clearance by the formula "Dimension b minus Dimension a", and select a suitable race so that Dimension t1 will be the specified clearance.
  59. Clearance
    t1 specified clearance is 0.25-0.55 mm (0.010-0.02 in).


    Object Number: 1343763  Size: SH
  60. Measure Dimensions a1 and a2 of the side cover.
  61. Calculate Dimension a by the formula "a2-a1".

  62. Object Number: 1343764  Size: SH
  63. Measure Dimension b from the side cover installation surface of the case to the washer seating surface of the reverse clutch.

  64. Object Number: 1343765  Size: SH
  65. Calculate the clearance by the formula "Dimension b minus Dimension a", and select a suitable thrust washer so that Dimension t2 will be the specified clearance.
  66. Clearance
    t2 specified clearance is 0.55-0.90 mm (0.02-0.03 in).


    Object Number: 1343766  Size: SH
  67. Apply sealant (2) to the side cover (1) as shown.

  68. Object Number: 1343767  Size: SH
  69. Position the three O-rings (2) in the case.

  70. Object Number: 1348680  Size: SH

    Important: Be careful not to damage the Teflon rings attached to the high clutch and the side cover.

  71. Install the side cover (1) in the case, and tighten the bolts with the specified torque.
  72. Tighten
    Tighten side cover bolts to 21 N·m (15 lb ft).


    Object Number: 1348679  Size: SH
  73. Install the parking rod (2) and the parking lever as a unit in the case, and install the E-ring (1).

  74. Object Number: 1343804  Size: SH

    Important: Be sure to insert the manual shaft from inside the case. Damage may occur if installed from the outside.

    Important: Before installing, apply AT fluid to the O-ring.

  75. Install the O-ring in the manual shaft, and insert the manual shaft from inside the case.

  76. Object Number: 1348678  Size: SH

    Important: Do not reuse the lock bolt as sealant may be attached to it.

  77. Tighten the manual shaft lock bolt (2).
  78. Tighten
    Tighten the manual shaft lock bolt to 7 N·m (61 lb in).


    Object Number: 1348676  Size: SH
  79. Install the manual plate (2) in the manual shaft (1). Fix the manual shaft outside the transmission case and tighten the manual plate nut.
  80. Tighten
    Tighten the manual plate nut to 13 N·m (115 lb in).


    Object Number: 1343815  Size: SH
  81. Install the solenoid connector (1) in the case.

  82. Object Number: 1343816  Size: SH
  83. While hanging the detent spring (3) on the manual plate (1), engage the manual valve (2) with the manual plate pin, and install the control valve.
  84. Ensure that the valve is fixed to the location pin.
  85. After installing the valve, ensure again with your fingers that the manual valve is engaged with the manual plate pin.

  86. Object Number: 1348673  Size: SH
  87. Tighten the control valve  (3) installation bolts.
  88. Tighten
    Tighten the control valve installation bolts to 8 N·m (70 lb in).

  89. Tighten the oil temperature sensor (1) and the ground terminal together.
  90. Install the same colored connector in each solenoid (2).

  91. Object Number: 1343817  Size: SH
  92. Install the magnet in the oil pan (1).
  93. Important: The coat of sealant should be wide and thick, approximately 3 mm (0.12 in) in width and 1.5 mm (0.06 in) thick.

    Important: The sealant should be applied thoroughly and evenly.

  94. Apply sealant (2) to the oil pan (1).

  95. Object Number: 1348672  Size: SH

    Important: The 4 bolts which fix the stiffener are of different lengths. Be sure to position them in the right places.

  96. While fixing the stiffener (2) to the 4 oil pan bolts, tighten the oil pan installation bolts.
  97. Tighten
    Tighten oil pan bolts to 13 N·m (115 lb in).


    Object Number: 1348671  Size: SH
  98. Install the parking lock support, and tighten.
  99. Tighten
    Tighten park lock support bolts to 27 N·m (19 lb ft).

  100. Position the parking pawl (4) and the parking spring (4) the hole, and fix them by inserting the shaft.
  101. Tighten the stopper bolt (2) of the parking pawl shaft.
  102. Tighten
    Tighten the stopper bolt to 5 N·m (44 lb in).


    Object Number: 1348670  Size: SH
  103. Install the reduction gear (1) with the converter housing facing upward.

  104. Object Number: 1348668  Size: SH

    Important: Do not reuse the input shaft seal ring. Apply AT fluid to a new seal ring before installation.

    Important: Do not reuse O-ring. Apply AT fluid to the new O-ring before installation.

  105. Insert the input shaft in the center of the output gear. Install the oil pump (2) and tighten the bolts with the specified torque. Then, install the O-ring in the input shaft.
  106. Tighten
    Tighten oil pump bolts to 13 N·m (115 lb in).


    Object Number: 1348667  Size: SH

    Important: Ensure that the differential assembly is flush with the reduction gear.

  107. Install the differential assembly (1) so that it is engaged with the reduction gear.

  108. Object Number: 1343819  Size: SH
  109. Select a differential assembly shim.
  110. Measure dimension L1 from the case installation surface of the converter housing to the seating surface of the shim bearing.

  111. Object Number: 1343820  Size: SH
  112. Measure dimension L2 from the converter housing installation surface of the case to the top of the differential assembly side bearing.

  113. Object Number: 1343821  Size: SH
  114. Calculate the clearance by the formula Dimension L1 Dimension L2 and select a suitable shim so that Dimension A will be the specified clearance.
  115. Clearance
    The specification clearance is A: 0-0.1 mm (0-0.004 in).


    Object Number: 1343822  Size: SH

    Important: The coat of sealant should be wide and thick, approximately 2 mm (0.08 in) in width and 1 mm (0.04 in) thick.

    The sealant should be applied thoroughly and evenly.

  116. Apply sealant (2) to the converter housing (1).

  117. Object Number: 1343823  Size: SH
  118. Install the converter housing (2) aligning with the case alignment pin (1).

  119. Object Number: 1348666  Size: SH
  120. Tighten the converter housing (1) installation bolts.
  121. Tighten
    Tighten the converter housing bolts to 30 N·m (22 lb ft).


    Object Number: 1348470  Size: SH
  122. Install the vehicle speed sensor (1), and tighten the bolt.
  123. Tighten
    Tighten the vehicle speed sensor bolt to 7 N·m (61 lb in).


    Object Number: 1348662  Size: SH
  124. Install the turbine sensor (1), and tighten the bolt.
  125. Tighten
    Tighten the turbine sensor bolt to 7 N·m (61 lb in).


    Object Number: 1343827  Size: SH
  126. Install the shift lever switch through the manual shaft, and temporarily tighten the bolt.
  127. Embed the select lever assembly in the manual shaft, and install the spring pin using DT 47530  (1).

  128. Object Number: 1343828  Size: SH
  129. Move the select lever assembly to shift into "N" range. Insert a 3 mm (0.11 in.) pin (drill bit) (1) in the location holes of the shift lever switch and the select lever assembly. Then tighten the bolts of the shift lever switch.
  130. Tighten
    Tighten the shift lever switch bolts to 3 N·m (26 lb in).


    Object Number: 1343829  Size: SH

    Important: Do not reuse the O-ring before installation, attach the new O-ring to the oil cooler with petroleum jelly.

  131. Align the convex section of the oil cooler with the case cut-out (1), and tighten the oil cooler installation bolt (2).
  132. Tighten
    Tighten the mounting bolt to 35 N·m (25 lb ft).


    Object Number: 1348658  Size: SH
  133. Insert the oil filler tube (1) in the case, and fix it to the case together with solenoid connector, and install the mounting bolt.
  134. Tighten
    Tighten the mounting bolt to 7 N·m (61 lb in).


    Object Number: 1348656  Size: SH
  135. Install the brackets (2, 3) and select cable bracket (1), and tighten the bolts.
  136. Tighten

        • Tighten bracket (3) bolt to 13 N·m (115 lb in).
        • Tighten bracket (2) bolt to 44 N·m (32 lb ft).
        • Tighten select cable bracket (1) bolts to 20 N·m (14 lb ft).

    Object Number: 1343832  Size: SH
  137. Install the bracket (1), and tighten the bolts.
  138. Tighten
    Tighten bracket bolts to 44 N·m (32 lb ft).


    Object Number: 1343833  Size: SH

    Important: 

       • Be sure to apply the AT fluid to the O-ring of the input shaft. (To prevent the O-ring from being damaged).
       • Before installing the converter (1), apply AT fluid to the oil seal lip. (To prevent lip breakage).
       • Be careful not to scratch or damage the lip of the oil seal with the sleeve during installation.
       • Do not use force during installation.
       • Remove all AT fluid which has fallen to the bottom of the housing when applying the AT fluid to the oil seal.
       • If AT fluid drops when installing the converter, remove it completely. (Do not overleap oil leakage).
       • When installing the transmission the engine, attach the torque converter (1) to the transmission, then install them with the engine. (If they are connected in a wrong order, the oil seal O-ring or oil pump may be damaged.)

  139. Pour AT fluid to the extent that the AT fluid does not spill when setting up the converter.
  140. Install the converter, turning it until the converter sleeve cut-out is aligned with the input shaft.
  141. Important: The oil pump may be damaged if the transmission case (2) is mounted on a vehicle with the torque converter attached incorrectly.

  142. Measure dimension a from the edge of the converter to the edge of the case to ensure that the converter is installed properly.
  143. Dimension
    The dimension a is 23.7 mm or more (0.9 in or more).

  144. Install the torque converter (2).