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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1159 (Manual Transmission - AISIN AY6) >> Repair Instructions - On Vehicle >> Transmission Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Identifying J 42640
    GM333146Courtesy of GENERAL MOTORS CORP.
    NOTE: The front wheels of the vehicle must be maintained in the straight ahead position and the steering column must be in the LOCK position before disconnecting the steering column or intermediate shaft. Failure to follow these procedures will cause improper alignment of some components during installation and result in damage to the SIR coil assembly.
  1. Turn the steering wheel so that the front wheels are pointing straight ahead.
  2. Turn the ignition lock cylinder to the lock position and remove the key.
  3. Lock the steering column through the access hole in the lower steering column trim cover using J 42640  .
  4. Remove the transmission control lever knob. Refer to Transmission Control Lever Knob Replacement .
  5. Remove the manual transmission control mount plate assembly. Refer to Transmission Control Mount Plate Replacement .
  6. Remove the exhaust system. Refer to Exhaust System Replacement (With LY7 and LLT) or Exhaust System Replacement (With LP1) .
  7. Remove the catalytic converters. Refer to Catalytic Converter Replacement - Left Side and Catalytic Converter Replacement - Right Side .
  8. Remove the propeller shaft. Refer to Rear Propeller Shaft Replacement (RWD) or Rear Propeller Shaft Replacement (AWD) .
  9. Fig 2: View Of Electrical Connector And Harness Retainers
    GM1979751Courtesy of GENERAL MOTORS CORP.
  10. Disconnect the electrical connector (5) from the vehicle speed sensor.
  11. Disconnect the electrical connector (4) from the backup lamp switch.
  12. Remove the electrical harness retainers (1) from the transmission.
  13. Position the electrical harness (2) out of the way.
  14. Fig 3: View Of Electrical Connector And Harness Retainers
    GM1979752Courtesy of GENERAL MOTORS CORP.
  15. Remove the electrical harness retainers (2) from the transmission.
  16. Position the electrical harness (1) out of the way.
  17. Support and secure the transmission with a suitable transmission jack.
  18. Remove the transmission support. Refer to Transmission Support Replacement (Manual Transmission) or Transmission Support Replacement (Automatic Transmission) .
  19. Remove the transmission control. Refer to Transmission Control Replacement .
  20. Fig 4: Identifying Clutch Retaining Hose Retaining Clip & Clutch Hydraulic Hose
    GM802767Courtesy of GENERAL MOTORS CORP.
  21. Remove the clutch hydraulic hose retaining clip (1) from the clutch slave cylinder.
  22. Disconnect the clutch hydraulic hose (2) from the clutch slave cylinder. It is not necessary to plug the lower hose end or slave cylinder fitting as they are equipped with check valves. Only minimal fluid loss may be experienced.
  23. Fig 5: Identifying Transmission Bolts
    GM1979746Courtesy of GENERAL MOTORS CORP.
  24. Remove the transmission bolts (1-6).
  25. Pull the transmission free from the engine dowels.
  26. IMPORTANT: Ensure clearance is maintained between the transmission and the following:
    • The clutch assembly
    • The input shaft
    • The catalytic converters
    • The wiring harnesses
    • The propeller shaft
  27. Using the transmission jack, carefully lower the transmission from the vehicle.