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Home >> Chrysler >> 2018 >> 300 C >> Repair and Diagnosis >> External Pages >> Different car >> Section 2 (Electronic Control Modules (Service Information)) >> Module, Transmission Control (TCM) >> Removal >> Removal 8HP90
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Removal 8HP90

WARNING: This page is about a different car, the 2018 Dodge Challenger. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:

The Transmission Control Module (TCM), or Transmission Control Module Assembly (TCMA) is extremely sensitive to Electrostatic Discharge (ESD). Always use a ground strap and follow the ESD guidelines in ELECTROSTATIC DISCHARGE (ESD) SENSITIVE DEVICES. Failure to follow these instructions may result in damage to the TCM/TCMA.

  1. Raise and support the vehicle. Refer to HOISTING, STANDARD PROCEDURE .
  2. Drain the transmission fluid. Refer to FLUID AND FILTER, STANDARD PROCEDURE .
    GC0152193Courtesy of CHRYSLER GROUP, LLC
  3. Turn the locking mechanism lock (1) of the transmission wire harness connector counter-clockwise and disconnect the wire harness connector from the transmission.
    GC0170254Courtesy of CHRYSLER GROUP, LLC
    NOTE:

    Inspect the gasket for reuse. If the seal is cut or torn, replace the gasket.

  4. Remove the transmission oil pan bolts (1).
  5. Remove the transmission oil pan (2) and gasket.
    GC0170496Courtesy of CHRYSLER GROUP, LLC
  6. Remove the transmission oil filter (1).
    GC0152243Courtesy of CHRYSLER GROUP, LLC
  7. Remove the Manual Park Release (MPR) lever nut (2) and remove the MPR lever (1).
  8. Reinstall the MPR lever 180 degrees offset. Using a tie strap, secure the lever into position so the park release fork remains in the same position for installation of the valve body assembly.
    GC0154626Courtesy of CHRYSLER GROUP, LLC
  9. If equipped, disconnect the Hydraulic Impulse Oil Storage (HIS) wire harness connector.
  10. If equipped, remove three HIS bolts (2 and 3) and the accumulator (1).
    GC0152103Courtesy of CHRYSLER GROUP, LLC
  11. Remove the valve body assembly end bolts (3).
  12. Lift the wire harness connector lock (2).
  13. Remove the speed sensor bolt (1) and pull the speed sensor (4) loose from the case.
    GC0152117Courtesy of CHRYSLER GROUP, LLC
  14. Using (special tool #10377, Remover/Installer, Guide Sleeve) (1) carefully pull the wire harness insulator (2) straight out from the transmission case (3).
    GC0152262Courtesy of CHRYSLER GROUP, LLC
  15. Remove two bolts and hand install (special tool #10379, Pins, Valve Body Alignment) (1).
  16. Use an appropriate tool on one of the alignment pins to assist in holding the valve body in position while removing the remaining fasteners.
    GC0169780Courtesy of CHRYSLER GROUP, LLC
  17. Remove remaining valve body assembly bolts.
  18. Remove the valve body assembly from the transmission.
    GC0152241Courtesy of CHRYSLER GROUP, LLC
    NOTE:

    The fluid port may remain in the valve body upon removal, remove and discard the O-rings.

  19. Remove the fluid transfer port (1) from the transmission.
  20. Remove and discard the O-ring (2) and seal (3).
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