Upper Control Valve Body

UPPER CONTROL VALVE BODY 4T80-E TRANSAXLE

DISASSEMBLE




1. Remove temperature sensor. Check valves for movement before removing.
2. Remove pressure control solenoid clamp bolt, clamp, then solenoid.
3. Remove spring retainer clip, then TCC pressure solenoid.
4. Remove coiled spring pin, then converter clutch control valve and spring.
5. Remove 1/2 and 3/4 bushing, then accumulator valves.
6. Remove spring retainer plate, actuator feed limit spring and valve.
7. Remove four retainer clips and bore plugs.
8. Remove 2/3 accumulator valve and spring.
9. Remove converter feed limit spring and valve, then TCC enable spring and valve.
10. Remove converter clutch regulator spring and converter regulator valve.
11. Remove oil pressure screen, then pressure control solenoid filter and seal.

INSPECTION
1. Inspect all seals for rollover, tearing or cuts.
2. Inspect snap rings for overexpansion.
3. inspect all valve and piston bores for nicks, scratches or wear.
4. Inspect accumulator pin for straightness by rolling on a flat surface.
5. Inspect filters for particles; type of material found could signify problems in other areas.
6. Inspect valve body passages for debris.
7. Inspect orifices cup ring for damage.

ASSEMBLE
1. Install new pressure control solenoid filter and seal, then new oil pressure screen.
2. Install converter regulator valve and clutch regulator spring.
3. Install TCC enable valve and spring, then converter feed limit valve and spring.
4. Install actuator feed limit valve, spring and retainer plate.
5. Install 2/3 accumulator spring and valve.
6. Install four bore plugs and retainer clips.
7. Install 1/2 and 3/4 accumulator valves and bushing.
8. Install coiled spring pin, then temperature sensor. Torque sensor to 30 inch lbs.
9. Install converter clutch control spring valve and coiled spring pin.
10. Install TCC pressure solenoid and spring retainer clip.
11. Install accumulator piston spring, then new seal on piston.
12. Install accumulator pin into piston, retaining with snap ring.
13. Install accumulator piston and pin into bore, retaining with snap ring.
14. Install pressure control solenoid, then bolt and clamp. Connect wiring harness to components on upper and lower control valve assemblies and measure resistance. This will verify continuity of wiring harness. Torque bolt to 8-9.5 ft. lbs.