Circuit/System Testing
WARNING: This page is about a different variant/trim than selected.
- Perform a line pressure test. Refer to Line Pressure Check procedure.
- Remove the Control valve body cover. Refer to Control Valve Body Cover Removal procedure.
- 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 Cultch
- 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 procedures.
- If all conditions test normal, test or replace the transmission.
- If excessive sediment is found inspect and replace as necessary the:
- 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 procedure.
- 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 procedure.
- If all circuits and components test normal, replace the transmission.