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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1007 (Automatic Transmission - 4L80-E/4L85-E (Introduction, Service & Replacement)) >> Repair Instructions >> Transmission Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the J 21366 onto the transmission bell housing to retain the torque converter.
  2. Raise the transmission into place and remove the J 21366 from the transmission.
  3. Slide the transmission straight onto the locating pins while lining up the marks on the flywheel and the torque converter. The torque converter must rotate freely by hand.
    4. NOTE: Refer to Fastener Notice in Cautions and Notices.
    Fig 1: Installing Studs And Bolt Securing The Transmission To The Engine
    GM394452Courtesy of GENERAL MOTORS CORP.
  4. Install studs and bolt securing the transmission to the engine.

    Tighten:  Tighten the studs and the bolt to 50 N.m (37 lb ft).

    5. Fig 2: Installing The Stud And Bolt On The Right Side Securing The Transmission To The Engine
    GM394454Courtesy of GENERAL MOTORS CORP.
  5. Install the stud and bolt on the right side securing the transmission to the engine.

    Tighten:  Tighten the stud and the bolt to 50 N.m (37 lb ft).

  6. If reusing the torque converter bolts with a 6.0L engine, clean the bolt threads and apply Loctite 242 GM P/N 12345382 (Canadian P/N 10953489), or equivalent to the threads prior to installation.
  7. If reusing the torque converter bolts with a 8.1L engine, clean the bolt threads and apply Loctite 272 GM P/N 12345493 (Canadian P/N 10953488), or equivalent to the threads prior to installation.
  8. Line up the marks made during removal and install the flywheel to torque converter bolts.

    Tighten:  Tighten the bolts to 60 N.m (44 lb ft).

  9. Install the torque converter cover to the transmission.
    Fig 3: Installing The Torque Converter Cover To The Transmission
    GM394458Courtesy of GENERAL MOTORS CORP.
  10. Install the bolts securing the torque converter cover.

    Tighten:  Tighten the bolts to 33 N.m (24 lb ft).

  11. Install the vent hose to the wiring harness using a new tie strap.
  12. Connect the wiring harness to the wiring loom on the left side of the transmission.
  13. Connect the electrical harness to the park/neutral position switch, the input speed sensor, and the output speed sensor.
  14. Install the range selector cable to the transmission range selector lever ball stud and bracket. Refer to Automatic Transmission Range Selector Cable Replacement .
    Fig 4: Installing The Range Selector Cable To The Transmission Range Selector Lever Ball Stud And Bracket
    GM394469Courtesy of GENERAL MOTORS CORP.
  15. Install the transfer case, if equipped. Refer to Transfer Case Assembly Replacement in Transfer Case NVG 149-NP (One Speed Automatic) or Transfer Case Assembly Replacement in Transfer Case NVG 236/246-NP8 (Two Speed Automatic).
    Fig 5: Identifying Crossmember & Bolts
    GM652595Courtesy of GENERAL MOTORS CORP.
  16. Install the transmission mount. Refer to Transmission Mount Replacement .
  17. Install the exhaust manifold pipe. Refer to Exhaust Manifold Pipe Replacement (6.0L, 6.6L, and 8.1L Engines) in Engine Exhaust.
  18. Install the transmission support. Refer to Transmission Support Replacement in Frame and Underbody.
  19. Remove the transmission jack.
  20. Install the rear propeller shaft. Refer to Propeller Shaft Replacement - One Piece or Propeller Shaft Replacement - Two Piece in Propeller Shaft.
    21. Fig 6: Connecting The Transmission Oil Cooler Lines To The Transmission
    GM396807Courtesy of GENERAL MOTORS CORP.
  21. Connect the transmission oil cooler lines to the transmission. Refer to Transmission Fluid Cooler Line Quick Connect Fitting .
  22. Install the transmission heat shield.
    Fig 7: Installing The Transmission Heat Shield
    GM102545Courtesy of GENERAL MOTORS CORP.
  23. Install the bolts securing the heat shield to the transmission.

    Tighten:  Tighten the bolts to 17 N.m (13 lb ft).

  24. Lower the vehicle.
  25. Fill the transmission to the proper level with Dexron® III transmission fluid. Refer to Transmission Fluid Checking Procedure .
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