FixVault
Home › Jeep › 2017 › Grand Cherokee Laredo, AWD › Repair and Diagnosis › Transmission › Transmission Control Systems › 8HP45/845RE Automatic Transmission (Service Information) › Installation

8HP45/845RE Automatic Transmission (Service Information): Installation

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 VERIFICATION TEST.

Refer to TRANSMISSION VERIFICATION TEST-8HP45-845RE .

  1. If a replacement transmission is being installed, transfer any components necessary, such as the manual shift lever and shift cable bracket, Mechanical Park Release 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's crankshaft.
  3. Install the torque converter. Refer to INSTALLATION  .
    GC0158384Courtesy of CHRYSLER GROUP, LLC
  4. Place the transmission on a jack and secure with chains or similar.
  5. Raise 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 torque converter bolt holes with the starter pocket to ease bolt installation.

  6. Move transmission forward. Then raise, lower, or tilt transmission to align the converter housing with the engine block dowels.
    NOTE:

    It may be necessary to support the rear of the engine during transmission installation.

  7. Carefully work transmission (2) forward and over engine block dowels until converter hub is seated in crankshaft. Verify that no wires, or the transmission vent hose, have become trapped between the engine block and the transmission.
    GC0138699Courtesy of CHRYSLER GROUP, LLC
  8. Install two bolts (1) to attach the transmission to the engine.
    GC0118998Courtesy of CHRYSLER GROUP, LLC
  9. Install remaining torque converter housing to engine bolts (3 and 4). Tighten all torque converter housing bolts to the proper torque specifications. Refer to TORQUE SPECIFICATIONS  .
    GC0152217Courtesy of CHRYSLER GROUP, LLC
  10. Rotate the crankshaft in a clockwise direction to line up the alignment hole (1) in the flex plate, then start the first bolt.
    GC0144169Courtesy of CHRYSLER GROUP, LLC
  11. Rotate the crankshaft in a clockwise direction until the flexplate to torque converter bolts (1) are accessible. There are three sets of two bolts 120° apart.
    GC0138700Courtesy of CHRYSLER GROUP, LLC
    NOTE:

    Install all torque converter bolts (1) by hand first. There are 3 sets of two bolts 120° apart.

  12. Install the torque converter to flexplate bolts (1) through the starter pocket and tighten to the proper torque specifications. Refer to TORQUE SPECIFICATIONS  .
  13. Connect the transmission vent hose.
    GC0173672Courtesy of CHRYSLER GROUP, LLC
  14. Connect the transmission lines (1). Be sure that the lines are fully seated.
  15. Snap the Jiffy Tite lock over the line fitting.
    GC0173635Courtesy of CHRYSLER GROUP, LLC
  16. Install the speed nut (1) retaining the transmission cooler line bracket (2) at the bellhousing, near the engine oil dipstick tube (3).
    GC0158324Courtesy of CHRYSLER GROUP, LLC
  17. Connect left front transmission line clip (1).
    GC0173690Courtesy of CHRYSLER GROUP, LLC
  18. Connect coolant hoses (1, 2) from the transmission heater.
  19. Install the two bolts that hold the transmission heater coolant hoses to the right side of the transmission.
    GC0158322Courtesy of CHRYSLER GROUP, LLC
  20. Install the Manual Park Release (MPR) cable (2) into the bracket (3) and lock into place.
    GC0081175Courtesy of CHRYSLER GROUP, LLC
  21. Check O-ring on plug connector (1), and replace if necessary.
  22. Install the plug connector (1) into the adapter plug (2). Turn bayonet lock of the adapter plug (2) clockwise to connect plug connector (1).
  23. Install the transfer case. Refer to 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.

  24. If 4WD, install the front propeller shaft to the transfer case. Refer to SHAFT, DRIVE, REAR, INSTALLATION .
    GC0158349Courtesy of CHRYSLER GROUP, LLC
  25. Install the crossmember and tighten bolts (1 and 3) to 68 N.m (50 ft. lbs.).
  26. Install the transmission mount nuts (2) and tighten to the proper torque specifications. Refer to TORQUE SPECIFICATIONS  .
  27. Install the rear propeller shaft. Refer to SHAFT, DRIVE, REAR, INSTALLATION .
    GC0158366Courtesy of CHRYSLER GROUP, LLC
  28. Remove the zip tie (3) from the MPR lever.
  29. Connect the MPR cable (1) to the MPR lever (2).
  30. Install heat shield for rear propeller shaft/muffler.
  31. Install the left catalytic converter. Refer to CONVERTER, CATALYTIC, INSTALLATION .
  32. If 4WD, install the front propeller shaft heat shield.
  33. If 4WD, install the front propeller shaft to axle flange bolts and tighten to the proper torque specifications. Refer to TECHNICAL SPECIFICATIONS .
  34. Install the rear section of exhaust. Refer to MUFFLER, EXHAUST, INSTALLATION .
  35. Install the starter. Refer to STARTER, INSTALLATION .
  36. If equipped install skid plates.
  37. Lower the vehicle.
  38. Fill the transmission with appropriate fluid. Refer to STANDARD PROCEDURE  .
  39. Connect the battery negative cable.
  40. Fill the cooling system. Refer to STANDARD PROCEDURE .
  41. If the valve body is replaced, program the Transmission Control Module (TCM). Refer to MODULE, TRANSMISSION CONTROL (TCM), MODULE PROGRAMMING .
  42. Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST-8HP45-845RE .
About FixVault