Circuit/System Testing

Perform a line pressure test. refer to LINE PRESSURE CHECK .
Remove the Control valve body cover. refer to CONTROL VALVE BODY COVER REMOVAL .
Inspect the inside of the control valve body cover for excessive sediment. There should not be excessive sediment.
- If excessive sediment is found inspect and replace as necessary the:
- Forward Clutch
- Direct Clutch
- 4-5 Clutch
- Second Coast Clutch
- 1-2, Reverse Clutch
- Low and Reverse Clutch
- 3rd Gear Band
- Second Clutch
- Second Clutch Sprag
- Low Clutch Sprag
refer to FORWARD AND DIRECT CLUTCH ASSEMBLY REMOVAL , 4-5 CLUTCH DRUM ASSEMBLY ASSEMBLE and 2ND CLUTCH ASSEMBLE .
- If all conditions test normal, test or replace the transmission.
Inspect the control valve body assembly for the following conditions. The conditions should not be found.
- Stuck 3-4, 4-5 Shift Solenoid Valve Assembly
- Stuck Reverse Shift Solenoid
- Stuck Shift PC Solenoid
- Stuck TCC Lock Up PC Solenoid
- Stuck Shift Pressure Control Valve
- Stuck Shift Pressure Relay Valve
- Stuck Second Clutch Control Valve
- Stuck 1-2, Reverse Clutch Control Valve
  refer to CONTROL VALVE REAR BODY DISASSEMBLE .
  - If any of the above conditions are found, repair or replace the valve body assembly. Refer to CONTROL VALVE BODY REPLACEMENT .
  - If all circuits and components test normal, replace the transmission.
Verify that the control valve body has been serviced within the past 3 months.
- If the control valve body has not been serviced, test or replace the control valve body assembly. refer to CONTROL VALVE BODY REPLACEMENT .
If all circuits and components test normal, replace the transmission.