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Home >> Jeep >> 2021 >> Gladiator Mojave, Part Time T/Case Control, Automatic Trans >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> 8HP50/850RE Automatic Transmission (Service Information) >> Removal And Installation >> Removal And Installation - 3.6L >> Notes

Removal And Installation - 3.6L: Notes

REMOVAL 

CAUTION:

The transmission and torque converter must be removed as an assembly to avoid component damage. The converter driveplate, oil pump, or oil seal can be damaged if the converter is left attached to the driveplate during removal. Be sure to remove the transmission and converter as an assembly.

NOTE:

If the transmission is being reconditioned (clutch/seal replacement) or replaced, it is necessary to perform the Transmission Control Module (TCM) Adaptation Procedure using the scan tool. Refer to MODULE, TRANSMISSION CONTROL (TCM), MODULE PROGRAMMING .

  1. Disconnect and isolate the negative battery cable(s). Refer to CABLES, BATTERY .
  2. Raise and support the vehicle. Refer to HOISTING, STANDARD PROCEDURE .
  3. Remove the transmission mount nuts. Refer to INSULATOR, ENGINE MOUNT, LEFT, REMOVAL AND INSTALLATIONINSULATOR, ENGINE MOUNT, RIGHT, REMOVAL AND INSTALLATION .
  4. If equipped, remove the transfer case skid plate. Refer to PLATE, SKID, REMOVAL AND INSTALLATIONPLATE, SKID, FUEL TANK, REMOVAL AND INSTALLATIONPLATE, SKID, TRANSFER CASE, REMOVAL AND INSTALLATION .
  5. Remove the starter. Refer to STARTER, REMOVAL AND INSTALLATION .
  6. Support the transmission with a suitable jack and remove the frame cross-member supporting the transmission Refer to CROSSMEMBER, FRONT REINFORCEMENT, REMOVAL AND INSTALLATIONCROSSMEMBER, TRANSMISSION, REMOVAL AND INSTALLATION .
    NOTE:

    Be careful not to damage the transmission pan. 

  7. Remove the exhaust pipe. Refer to Y-PIPE, EXHAUST, REMOVAL AND INSTALLATION .
  8. Remove the heat shield below rear prop shaft.
    GC0181327Courtesy of CHRYSLER GROUP, LLC
    1 - Manual Park Release (MPR) Cable Bracket Bolts
    2 - MPR cable
    3 - MPR Lever
  9. Disconnect the Manual Park Release (MPR) cable from the MPR lever.
    GC0186250Courtesy of CHRYSLER GROUP, LLC
    1 - Transmission Heater Coolant Hose Bracket Bolts
    2 - Transmission Heater Coolant Hoses
  10. Remove the bolts that hold the transmission heater coolant hoses to the right side of the transmission.
    GC0182032Courtesy of CHRYSLER GROUP, LLC
    1 - Transmission Wire Harness Connector
  11. Disconnect the 13-pin plug connector. Turn the connector counter-clockwise to release.
    GC0186245Courtesy of CHRYSLER GROUP, LLC
    1 - Vapor Line Bracket Bolts
    2 - Vapor Line Assembly
  12. Remove the vapor line bracket bolts and let the bracket and lines hang freely.
  13. Remove all remaining wiring harness retainers from the transmission.
    GC0181327Courtesy of CHRYSLER GROUP, LLC
    1 - Manual Park Release (MPR) Cable Bracket Bolts
    2 - MPR cable
    3 - MPR Lever
  14. Remove the bolts from the MPR cable bracket and position the cable bracket aside.
    GC0182227Courtesy of CHRYSLER GROUP, LLC
    1 - Transmission Oil Cooler Line Clip
    2 - Transmission Oil Cooler Line Retaining Bolts
  15. Disconnect the left front transmission oil cooler line clip.
  16. Remove the two transmission oil cooler line retaining bolts from the transmission, and one transmission oil cooler line retaining bolt from the engine.
    GC0186240Courtesy of CHRYSLER GROUP, LLC
    1 - Transmission Oil Cooler Lines
  17. Using the (special tool #9546, Disconnect Tool), disconnect the transmission oil cooler lines from the transmission.
    GC0186356Courtesy of CHRYSLER GROUP, LLC
    1 - Transmission Oil Heater Bolts
    2 - Transmission Oil Heater
  18. Remove the bolts retaining the transmission oil heater. Position the transmission oil heater aside.
    GC0192082Courtesy of CHRYSLER GROUP, LLC
    1 - Transmission Oil Heater
    2 - Wire
  19. Using a suitable tool, secure the transmission oil heater to the frame.
    GC0184547Courtesy of CHRYSLER GROUP, LLC
    1 - Transmission Vent Hose
  20. Disconnect transmission vent hose.
    GC0181824Courtesy of CHRYSLER GROUP, LLC
    1 - Torque Converter Bolt Location
  21. Rotate the crankshaft clockwise and remove six torque converter bolts through the starter pocket.
    NOTE:

    There are three sets of two torque converter bolts located 120° apart from each other. 

    NOTE:

    If necessary, use a grease pen or similar to mark crankshaft pulley every 120° for converter bolt location. 

  22. Remove the transmission to engine bolts.
  23. Support engine with a suitable stand before removing transmission.
    NOTE:

    Be careful not to damage the engine oil pan when using the stand. Use a rubber or wood block between the pan and the stand to support the engine. 

  24. Secure the transmission to a suitable jack.
  25. Carefully maneuver the transmission and the torque converter assembly rearward off of the engine block dowels.
    NOTE:

    Be careful not to damage or bend the transmission oil cooler lines. 

  26. Hold the torque converter in place during removal of the transmission.
  27. Lower transmission and remove the assembly from under the vehicle.
  28. Remove the torque converter. Refer to TORQUE CONVERTER, REMOVAL AND INSTALLATION .

INSTALLATION 

NOTE:

If the transmission is being reconditioned (clutch/seal replacement) or replaced, it is necessary to perform the TRANSMISSION VERIFICATION TEST

Refer to TRANSMISSION VERIFICATION TEST .

  1. If a replacement transmission is being installed, transfer any components necessary such as the shift cable bracket and MPR bracket from the original transmission onto the replacement transmission.
  2. Apply a light coating of Mopar® High Temp Grease to the torque converter hub pocket in the rear pocket of the engine crankshaft.
  3. Install the torque converter. Refer to TORQUE CONVERTER, REMOVAL AND INSTALLATION .
  4. Place the transmission on a suitable jack and secure the transmission to the jack.
  5. Raise the transmission and align the torque converter with the drive plate and the transmission converter housing with the engine block.
    NOTE:

    If the torque converter was spun or removed, align the torque converter bolt holes with the starter pocket to ease the bolt installation. 

  6. Move the transmission forward. Then maneuver the transmission to align the converter housing with the engine block dowels.
    NOTE:

    It may be necessary to use a suitable jack to support the rear of the engine during transmission installation. 

  7. Carefully maneuver the transmission forward and over the engine block dowels until the converter hub is seated in the crankshaft. Verify that there are no wires lose or that the transmission vent hose have become trapped between the engine block and the transmission.
  8. Install two bolts to attach the transmission to the engine.
  9. Install the remaining torque converter housing to engine bolts. Tighten all of the torque converter housing bolts.
    GC0181824Courtesy of CHRYSLER GROUP, LLC
    1 - Close Tolerance Torque Converter Bolt Hole
  10. Rotate the crankshaft in a clockwise direction to line up the close tolerance torque converter bolt hole in the flex plate, then start the first bolt.
  11. Rotate the crankshaft in a clockwise direction until the flexplate to torque converter bolts are accessible. There are three sets of two bolts 120° apart.
    NOTE:

    Install all torque converter bolts by hand first. There are three sets of two bolts 120° apart. 

  12. Install the torque converter to flexplate bolts through the starter pocket.
    GC0184547Courtesy of CHRYSLER GROUP, LLC
    1 - Transmission Vent Hose
  13. Connect the transmission vent hose.
    GC0186356Courtesy of CHRYSLER GROUP, LLC
    1 - Transmission Oil Heater Bolts
    2 - Transmission Oil Heater
  14. Install the transmission oil heater and tighten the transmission oil heater bolts.
    GC0186240Courtesy of CHRYSLER GROUP, LLC
    1 - Transmission Oil Cooler Lines
  15. Connect the transmission lines to the transmission. Be sure that the lines are fully seated. Snap the lock ring over the line fitting.
    GC0182227Courtesy of CHRYSLER GROUP, LLC
    1 - Transmission Oil Cooler Line Clip
    2 - Transmission Oil Cooler Line Retaining Bolts
  16. Install the two transmission oil cooler line retaining bolts to the transmission, and one transmission oil cooler line retaining bolt to the engine. Connect left front transmission line clip.
    GC0186250Courtesy of CHRYSLER GROUP, LLC
    1 - Transmission Heater Coolant Hose Bracket Bolts
    2 - Transmission Heater Coolant Hoses
  17. Install the two bolts that hold the transmission heater coolant hoses to the right side of the transmission.
    GC0181327Courtesy of CHRYSLER GROUP, LLC
    1 - Manual Park Release (MPR) Cable Bracket Bolts
    2 - MPR cable
    3 - MPR Lever
  18. Install the MPR cable bracket and tighten the bolts.
    GC0182032Courtesy of CHRYSLER GROUP, LLC
    1 - Transmission Wire Harness Connector
  19. Connect the 13-pin plug connector. Turn the connector clockwise to lock.
    GC0186245Courtesy of CHRYSLER GROUP, LLC
    1 - Vapor Line Bracket Bolts
    2 - Vapor Line Assembly
  20. Install the vapor line bracket bolts.
  21. Install the transfer case. Refer to REMOVAL AND INSTALLATION .
    NOTE:

    Support the front of the front propeller shaft. Do not install the front propeller shaft to axle bolts until the left side catalytic converter is installed. 

  22. Install the front propeller shaft to the transfer case. Refer to REMOVAL AND INSTALLATION .
  23. Install the transmission mount nuts. Refer to INSULATOR, ENGINE MOUNT, LEFT, REMOVAL AND INSTALLATION , and INSULATOR, ENGINE MOUNT, RIGHT, REMOVAL AND INSTALLATION .
  24. Install the rear propeller shaft. Refer to REMOVAL AND INSTALLATION .
    GC0181327Courtesy of CHRYSLER GROUP, LLC
    1 - Manual Park Release (MPR) Cable Bracket Bolts
    2 - MPR cable
    3 - MPR Lever
  25. Connect the MPR cable to the MPR lever.
  26. Install the heat shield for the rear propeller shaft/muffler.
  27. Install the front propeller shaft. Refer to REMOVAL AND INSTALLATION .
  28. Install the exhaust pipe. Refer to Y-PIPE, EXHAUST, REMOVAL AND INSTALLATION .
  29. Install the frame cross-member supporting the transmission. Refer to CROSSMEMBER, TRANSMISSION, REMOVAL AND INSTALLATION .
  30. Install the starter. Refer to STARTER, REMOVAL AND INSTALLATION .
  31. Install the transfer case skid plate. Refer to PLATE, SKID, FUEL TANK, REMOVAL AND INSTALLATIONPLATE, SKID, TRANSFER CASE, REMOVAL AND INSTALLATION .
  32. Fill the transmission with appropriate fluid. Refer to TRANSMISSION FILL AFTER SERVICE  .
  33. Lower the vehicle.
  34. Connect the negative battery cable(s). Refer to CABLES, BATTERY .
  35. If the valve body is replaced, program the Transmission Control Module (TCM). Refer to MODULE, TRANSMISSION CONTROL (TCM), MODULE PROGRAMMING .
  36. Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
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