Allison - Automatic Transmission

Note: The TCC PWM Solenoid is solenoid F

Control Valve Solenoid Replacement (Solenoid C, D, E, F, G)

Removal Procedure






1. Remove the oil pan and the transmission internal oil filter. Refer to Oil Pan Replacement, Service and Repair
2. Disconnect the internal wiring harness from the solenoid being changed.
3. Remove the solenoid retainer (2) for shift solenoid C (5). Note the position of the solenoid connector and pull the solenoid (5) out of the bore in the control valve assembly (1). The O-rings (3 and 4) provide the resistance felt during removal.






4. Remove the solenoid retainers (6) for shift solenoid D (1), shift solenoid E (4), or the torque converter clutch pulse width modulated (TCC PWM) solenoid (7), whichever is being replaced.
5. Note the position of the solenoid connector and pull the solenoid out of the bore in the control valve assembly. The O-rings (2 and 3) provide the resistance felt during removal.

Installation Procedure






1. Obtain a new shift solenoid D (1), shift solenoid E (4), TCC PWM solenoid (7), or modulated main pressure solenoid G. Install O-rings (2 and 3) and lubricate with clean transmission fluid. Push the new solenoid into the control valve assembly (5) with the wiring harness connector in the correct position.
2. Install the solenoid retainer (6). Connect the internal wiring harness to the solenoids replaced.






3. For a new shift solenoid C (5), install O-rings (3) and (4) and lubricate with clean transmission fluid. Push the new shift solenoid C (5) into the control valve assembly with the wiring harness connector in the correct position. Install the solenoid retainer (2).
4. Install the oil pan and transmission internal oil filter. Refer to Oil Pan Replacement, Service and Repair