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Home >> Alfa Romeo >> 2021 >> Stelvio Ti >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> 8HP50/850RE - Automatic Transmission (Service Information) >> Valve Body >> Removal And Installation

Removal And Installation

REMOVAL 

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 SENSITIVE DEVICES. Failure to follow these instructions may result in damage to the TCM/TCMA.

NOTE:

If valve body with TCM/TCMA is being replaced with a new unit, use a diagnostic scan tool to perform the Flash Programming Procedure (if available).

  1. Disconnect and isolate the negative battery cable.
  2. Raise and support the vehicle. Refer to HOISTING, STANDARD PROCEDURE .
  3. Drain the transmission fluid into a clean container. Refer to STANDARD PROCEDURE  .
    GC0181003Courtesy of CHRYSLER GROUP, LLC
  4. Disconnect the transmission solenoid wire harness connector by turning the locking mechanism lock (1) of the adapter plug counter-clockwise and slightly pulling the transmission solenoid wire harness connector.
    GC0195013Courtesy of CHRYSLER GROUP, LLC
    NOTE:

    Inspect the gasket (1b) for reuse. If the seal is cut or torn, replace the gasket.

  5. Remove the thirteen transmission oil pan/filter assembly bolts (1a).
  6. Carefully detach the transmission oil pan/filter assembly (1b) and gasket.
    GC0181009Courtesy of CHRYSLER GROUP, LLC
  7. If equipped, disconnect the Hydraulic Impulse Oil Storage (H.I.S) connector (1).
  8. If equipped, remove three bolts (2a) and the H.I.S. accumulator (2b).
    GC0180977Courtesy of CHRYSLER GROUP, LLC
  9. Remove the valve body assembly end retainer bolts (1).
  10. Lift the electrical connector lock (2b) to release the internal harness end from inside the transmission for valve body assembly removal.
  11. Remove the Output Speed Sensor (OSS) bolt (1) and pull the OSS (2a) loose from the case.
    GC0152117Courtesy of CHRYSLER GROUP, LLC
  12. Using (special tool #10377, Remover/Installer, Guide Sleeve) (1) carefully pull the electrical harness insulator (2) straight out from the transmission case (3).
    GC0181021Courtesy of CHRYSLER GROUP, LLC
  13. Remove the valve body assembly (1b) bolts (1a).
    GC0180986Courtesy of CHRYSLER GROUP, LLC
  14. Carefully lower the valve body assembly (1a) 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.

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

INSTALLATION 

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 SENSITIVE DEVICES. Failure to follow these instructions may result in damage to the TCM/TCMA.

GC0152241Courtesy of CHRYSLER GROUP, LLC
  1. Install the fluid port (1) with NEW  O-rings (2) and seal (3) to the valve body.
    GC0162906Courtesy of CHRYSLER GROUP, LLC
  2. Install one of the valve body (special tool #10379, Pins, Valve Body Alignment) (3) in the rear of the transmission as shown as a guide.
    NOTE:

    Make sure the speed sensor at the rear of the valve body does not get caught between the valve body and the transmission case when positioning the valve body to the case. 

  3. Carefully guide the front of the valve body over the cradle while aligning the rear of the valve body with the alignment pin.
    GC0162910Courtesy of CHRYSLER GROUP, LLC
  4. Install the front alignment pin (1).
    GC0180972Courtesy of CHRYSLER GROUP, LLC
  5. When installing the valve body assembly, press the park lever (a) to align (b) in the park control solenoid valve (c).
  6. Use an appropriate tool on one of the alignment pins to assist in holding the valve body in position while installing the remaining fasteners.
    GC0169780Courtesy of CHRYSLER GROUP, LLC
  7. Install the valve body assembly retaining bolts not including 16-18 and hand tighten.
  8. Remove the pins and install the remaining bolts.
    GC0152117Courtesy of CHRYSLER GROUP, LLC
  9. Using (special tool #10377, Remover/Installer, Guide Sleeve) (1) carefully install the electrical harness insulator (2) to the transmission case (3).
  10. Lock the electrical connector lock (2) to the internal harness end.
    GC0181025Courtesy of CHRYSLER GROUP, LLC
  11. Install the OSS (1a) in the case install the OSS bolt (1b) and tighten to the proper torque specifications. Refer to TORQUE SPECIFICATIONS  .
    GC0181009Courtesy of CHRYSLER GROUP, LLC
  12. If equipped, install the Hydraulic Impulse Oil Storage (H.I.S.) accumulator (2b).
  13. Tighten the bolts (2a) to the proper torque specifications. Refer to TORQUE SPECIFICATIONS  .
  14. Connect the H.I.S. electrical connector (1).
    GC0169780Courtesy of CHRYSLER GROUP, LLC
  15. Tighten the valve body assembly bolts 1-18 in the sequence shown to 8 N.m (71 in. lbs.).
    GC0195013Courtesy of CHRYSLER GROUP, LLC
  16. Install the transmission oil pan/filter assembly and gasket (1b).
    GC0152239Courtesy of CHRYSLER GROUP, LLC
  17. Install the thirteen transmission oil pan bolts and tighten to the proper using the sequence shown in illustration. Refer to TORQUE SPECIFICATIONS  .
    GC0181004Courtesy of CHRYSLER GROUP, LLC
  18. Install the transmission wire harness connector (1a) back in the transmission case in the correct position (1b).
    GC0152193Courtesy of CHRYSLER GROUP, LLC
  19. Connect the plug connector (1).
    GC0180963Courtesy of CHRYSLER GROUP, LLC
  20. Turn the locking mechanism (1) of the harness plug clockwise and lock in place.
  21. If the valve body is replaced, program the TCM. Refer to MODULE, TRANSMISSION CONTROL (TCM), MODULE PROGRAMMING .
  22. Perform the TRANSMISSION FILL AFTER SERVICE procedure. Refer to TRANSMISSION FILL AFTER SERVICE  .
  23. Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .