Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Valve Body: Removal
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.
- Disconnect and isolate the negative battery cable.
- Raise and support the vehicle. Refer to HOISTING, STANDARD PROCEDURE .
- Drain the transmission fluid. Refer to FLUID AND FILTER, STANDARD PROCEDURE .
- Turn the locking mechanism lock (1) of the adapter plug counter-clockwise and disconnect the connector from the transmission.NOTE:
Inspect the gasket for reuse. If the seal is cut or torn, replace the gasket.
- Remove the thirteen oil pan retaining bolts (2).
- Carefully detach the oil pan (1) and gasket.
- Detach the Manual Park Release (MPR) cable (1) from the lever (2).
- Using a suitable tie strap (3), secure the MPR lever into position so the park release fork remains in the same position for installation of the valve body assembly.
- Remove the nuts (2) from the rear mount to the transmission crossmember.
- Using a high stand or equivalent tool, carefully raise the back of the transmission.
- If equipped, disconnect the Hydraulic Impulse Oil Storage (H.I.S) (1) connector.
- If equipped, remove three bolts (2 and 3) and the H.I.S. accumulator (1).
- Remove the valve body assembly end retainer bolts (3).
- Lift the electrical connector lock (2) to release the internal harness end from inside the transmission for valve body assembly removal.
- Remove the output speed sensor retaining bolt (1) and pull the sensor (4) loose from the case.
- Using (special tool #10377, Remover/Installer, Guide Sleeve) (1) carefully pull the electrical harness insulator (2) straight out from the transmission case (3).
- Remove two bolts and hand install (special tool #10379, Pins, Valve Body Alignment) (1).
- Use an appropriate tool on one of the alignment pins to assist in holding the valve body in position while removing the remaining fasteners.
- Remove the remaining valve body assembly retaining bolts (1-14).
- Carefully lower the valve body assembly from the transmission.NOTE:
The fluid port may remain in the valve body upon removal, remove and discard the O-rings.
- Remove the fluid transfer port (1) from the transmission.
- Remove and discard the O-ring (2) and seal (3).
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.