Accumulator: Service and Repair

Accumulator and 2-1 Manual Servo Replacement

Removal Procedure

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle Service and Repair.
2. Remove the filter. Refer to Automatic Transmission Fluid Filter and Seal Replacement 4T65-E - Automatic Transmission.




3. Remove the accumulator bolts (131).
4. Remove the manual 2-1 band servo cover bolts (103).




5. Remove the accumulator assembly.




6. Remove the manual 2-1 band servo (106-116).
7. To disassemble, inspect and service the accumulator and 2-1 manual servo. Refer to 2-1 Manual Band Servo Disassemble 112. 2-1 Manual Band Servo Disassemble.

Installation Procedure

1. If disassembled, assemble the 2-1 band servo. Refer to 2-1 Manual Band Servo Assemble 113. 2-1 Manual Band Servo Assemble.




2. Install the manual 2-1 band servo (106-116).




3. Install the accumulator assembly.





Caution: Refer to Fastener Caution Fastener Caution.

4. Install the manual 2-1 band servo cover bolts (103).

Tighten the bolts to 25 Nm (18 lb ft).

5. Install the accumulator bolts (131).

Tighten the bolts to 11 Nm (97 lb in).

Note: It is recommended that transmission adaptive pressure (TAP) information be reset.

Resetting the TAP values using a scan tool will erase all learned values in all cells. As a result, the engine control module (ECM), powertrain control module (PCM) or transmission control module (TCM) will need to relearn TAP values. Transmission performance may be affected as new TAP values are learned. Reset the TAP values. Refer to Transmission Adaptive Functions Transmission Adaptive Functions.

6. Install the filter. Refer to Automatic Transmission Fluid Filter and Seal Replacement 4T65-E - Automatic Transmission.
7. Lower the vehicle.