Front Upper Valve Body Disassembly

REMOVE OR DISCONNECT

NOTICE: When disassembling the front upper valve body, keep all valve springs, spring seats and plugs with their respective valves. Most valve springs are of different sizes and CANNOT be interchanged. Make sure all parts are Clean and dry before assembly.





1. Throttle valve keep plate from valve body.





2. Using flat bladed screwdriver, hold cut back valve plug and remove cut back retainer with a magnet then remove cut back plug, cut back valve and cut back valve spring.





3. One bolt on front valve body end cover and loosen the other to move cover.
4. Secondary regulator valve sub assembly and regulator valve spring.
5. One remaining cover bolt and end cover from valve body.





6. Cam bolt, TV cable cam, cam return spring and cam spacer.

Important
- Note the number of throttle valve compensating ring(s) prior to removal. Line pressure is determined by the number of adjusting rings. The same number of compensating ring(s) that were removed must be installed to ensure proper transmission line pressure. Some valve bodies do not require adjusting rings.





7. Push throttle valve slightly in and remove locating pin with magnet from down shift plug.





8. Down shift plug, throttle valve primary spring, throttle valve, secondary valve spring and throttle valve compensating ring(s) from valve body.

CLEAN
- All upper valve body components and dry thoroughly.

INSPECT
1. All valves for cracks, scoring or other Damage.
- Replace as necessary.
2. All valve springs for damage or distortion. Replace as necessary.
3. Front upper valve body valve bores for scoring or cracks. Replace as necessary.

MEASURE

^ Tool Required:
- J 26900-5 Vernier Caliper

1. Free length and outer coil diameter of all front upper valve body valve springs using a J 26900-5. If spring free length is not as specified in the front upper valve body spring table, replace as necessary.