Avalanche, Express, Savana 2006-2007

Transmission Removal & Installation

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4L60E, 4L65E & 4L70E



  1. Remove or disconnect the following:
    NOTE
    Plug the oil level indicator tube opening in the transmission.



    Transmission fluid
     
    Transmission oil level indicator tube and seal from the transmission
     



    Shift cable end from the transmission shift lever ball stud
     
    Transfer case, if AWD
     
    Rear propeller shaft.
     

  2.  
  3. Plug the transmission oil cooler line connectors in the transmission case.
  4.  
  5. Remove or disconnect the following:

    Starter motor
     

  6.  
  7. Support the transmission with a transmission jack.
  8.  
  9. Remove or disconnect the following:

    Click image to see an enlarged view

    Fig. Exploded view of the trnasmission mounting-4L60E, 4L65E and 4L70E



    Torque converter access plug
     
    Mark the flywheel and the torque converter alignment
     
    Flywheel-to-torque converter bolts
     
    Transmission rear mount-to-transmission bolts and nut
     
    Heat shield-to-transmission bolts
     
    Transmission vent hose from the transmission
     
    Fuel lines from the transmission
     
    Wiring harness from the transmission
     
    Transmission-to-engine stud and bolt
     
    Studs and bolt securing the transmission to the engine.
     

  10.  
  11. Pull the transmission straight back.
  12.  
  13. The transmission from the vehicle
  14.  
  15. Flush the transmission oil cooler and cooling lines.
  16.  

To install:

  1. Support the transmission with a transmission jack.
  2.  
  3. Raise the transmission into place and remove the tool from the transmission.
  4.  
  5. Slide the transmission straight onto the locating pins while lining up the marks on the flywheel and the torque converter. The torque converter must be flush onto the flywheel and rotate freely by hand.
  6.  
  7. Install or connect the following:

    Studs and bolt securing the transmission to the engine. Tighten to 34 ft. lbs. (47 Nm).
     
    Flywheel to torque converter bolts. Tighten to 46 ft. lbs. (63 Nm) and use Loctite 242 on the threads
     
    Torque converter access plug
     
    Transmission vent hose to the transmission
     
    Fuel lines to the transmission
     
    Wiring harness to the transmission.
     
    Heat shield-to-transmission bolts and tighten to 13 ft. lbs. (17 Nm)
     
    Transmission rear mount-to-transmission bolt and nut and tighten to 18 ft. lbs. (25 Nm)
     

  8.  
  9. Remove the transmission jack from the transmission.
  10.  
  11. Unplug the transmission oil cooler line connectors in the transmission case.
  12.  
  13. Install or connect the following:

    Transmission oil cooler lines
     
    Transfer case, if equipped
     
    Rear propeller shaft
     
    Shift cable end to the transmission shift lever ball stud
     

  14.  
  15. Unplug the oil level indicator tube opening in the transmission.
  16.  
  17. Install the transmission oil level indicator tube and seal to the transmission.
  18.  
  19. Tighten the oil pan bolts and fill the transmission with transmission fluid.
  20.  
  21. Lower the vehicle.
  22.  

4L80E & 4L85E



  1. Remove or disconnect the following:

    Transmission fluid
     
    Transmission oil level indicator tube and seal from the transmission
     

  2.  
  3. Plug the oil level indicator tube opening in the transmission.

    Shift cable from the transmission shift lever ball stud
     
    Transfer case, if AWD
     
    Rear propeller shaft.
     
    Transmission oil cooler lines, then plug thee openings in the transmission case
     
    Starter motor
     

  4.  
  5. Support the transmission with a transmission jack.

    Heat shield
     
    Transmission vent hose
     
    Fuel lines from the transmission
     
    Wiring harness from the transmission
     
    Transmission brace-to-engine bracket and transmission nut and bolt
     
    Torque converter cover
     
    Mark the flywheel and the torque converter alignment
     
    Flywheel to torque converter bolts
     
    Transmission rear mount
     
    Stud and bolt on the right side securing the transmission to the engine
     
    Remaining six studs and the bolt securing the transmission to the engine

    Click image to see an enlarged view

    Fig. Exploded view of the trnasmission mounting-4L80E and 4L85E

     

  6.  
  7. Pull the transmission straight back. Remove the transmission from the vehicle.
  8.  
  9. Flush the transmission oil cooler and cooling lines when you remove the transmission.
  10.  

To install:

  1. Support the transmission with a transmission jack.
  2.  
  3. Raise the transmission into place and remove the tool from the transmission.
  4.  
  5. Slide the transmission straight onto the locating pins while lining up the marks on the flywheel and the torque converter. The torque converter must be flush onto the flywheel and rotate freely by hand.
  6.  
  7. Install or connect the following:

    Six studs and bolt securing the transmission to the engine. Tighten to 34 ft. lbs. (47 Nm).
     
    Stud and bolt on the right side securing the transmission to the engine. Tighten to 34 ft. lbs. (47 Nm).
     
    Flywheel-to-torque converter bolts and tighten to 46 ft. lbs. (63 Nm).
     
    Transmission vent hose
     
    Fuel lines
     
    Wiring harness
     
    Heat shield. Tighten the bolts to 13 ft. lbs. (17 Nm).
     
    Transmission rear mount-to-transmission nuts and bolt. Tighten to 18 ft. lbs. (25 Nm).
     
    Transmission brace. Tighten the bolts and nut to 37 ft. lbs. (50 Nm).
     

  8.  
  9. Remove the transmission jack from the transmission.

    Starter motor
     

  10.  
  11. Unplug the transmission oil cooler line connectors in the transmission case.
  12.  
  13. Connect the transmission oil cooler lines to the transmission.
  14.  
  15. Install or connect the following:

    Rear propeller shaft
     
    Transfer case, if AWD
     
    Shift cable end to the transmission shift lever ball stud
     

  16.  
  17. Unplug the oil level indicator tube opening in the transmission.
  18.  
  19. Install the transmission oil level indicator tube and seal to the transmission.
  20.  
  21. Tighten the oil pan bolts and fill the transmission with transmission fluid.
  22.  
  23. Lower the vehicle.
  24.  

 
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