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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1626 (Automatic Transmission - 4L80-E - Service & Replacement) >> Repair Instructions >> Transmission Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 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.
    NOTE: Refer to FASTENER NOTICE .
  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).

    Fig 1: Installing Studs & Bolt Securing Transmission To Engine
    G01952451Courtesy 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. Fig 2: Installing Stud & Bolt
    G01952452Courtesy of GENERAL MOTORS CORP.
  6. 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).

  7. Install the torque converter cover to the transmission.
  8. Install the bolts securing the torque converter cover.

    Tighten 

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

    9. Fig 3: Installing Torque Converter Cover To Transmission
    G01952453Courtesy of GENERAL MOTORS CORP.
  9. Install the vent hose to the wiring harness using a new tie strap.
  10. Connect the wiring harness to the wiring loom on the left side of the transmission.
  11. Connect the electrical harness to the park/neutral position switch, the input speed sensor, and the output speed sensor.
  12. Install the range selecter cable to the transmission range selecter lever ball stud and bracket. Refer to Automatic Transmission Range Selector Cable Replacement   . 
    13. Fig 4: Connecting Wiring Harness To Wiring Loom On Left Side Of Transmission
    G01952454Courtesy of GENERAL MOTORS CORP.
  13. Install the transfer case, if equipped. Refer to TRANSFER CASE ASSEMBLY REPLACEMENT for NVG 149-NP or TRANSFER CASE ASSEMBLY REPLACEMENT for NVG 236/246-NP8.
  14. Install the transmission mount. Refer to Transmission Mount Replacement   . 
  15. Install the exhaust manifold pipe.
  16. Install the transmission support. Refer to Transmission Support Replacement in Frame and Underbody.
  17. Remove the transmission jack.
  18. Install the rear propeller shaft. Refer to PROPELLER SHAFT REPLACEMENT - ONE PIECE or PROPELLER SHAFT REPLACEMENT - TWO PIECE .
    19. Fig 5: Installing Transmission Mount
    G01952455Courtesy of GENERAL MOTORS CORP.
  19. Flush the transmission oil cooler and lines at this time. Refer to Automatic Transmission Oil Cooler Flushing And Flow Test   . 
  20. Connect the transmission oil cooler lines to the transmission. Refer to Transmission Oil Cooler Line Quick Connect Fitting   . 
    Fig 6: Connecting Transmission Oil Cooler Lines To Transmission
    G01952456Courtesy of GENERAL MOTORS CORP.
  21. Install the transmission heat shield.
  22. Install the bolts securing the heat shield to the transmission.

    Tighten 

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

  23. Lower the vehicle.
  24. Fill the transmission to the proper level with DEXRON® III transmission fluid. Refer to Transmission Fluid Checking Procedure   . 
    25. Fig 7: Installing Transmission Heat Shield & Bolts
    G01952457Courtesy of GENERAL MOTORS CORP.
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