Main Control Valve Body

A4LD

CONTROL VALVE BODY

Removal

1. Raise the vehicle on a hoist so the transmission and pan is accessible.
2. Loosen the pan attaching bolts and drain the fluid from the transmission. If the same fluid is to be used again, filter the fluid through a 100 mesh screen. Reuse the fluid only if it is in good condition.






3. Remove the transmission fluid pan attaching bolts, pan and gasket.
4. Remove the filter screen and 0-rings.
5. Remove low-reverse servo cover, piston, spring and gasket.
6. Disconnect the two wires at the converter clutch solenoid.
7. Remove the bolts from the control valve body. Carefully ease the body from the case while unlocking and detaching the selector lever connecting rod.

Caution: the bolts are of different lengths and their locations are different from the bolt locations on other automatic transmissions.

Installation

1. Clean and inspect the valve body.
a. Clean all parts throughly in clean solvent and blow dry with moisture-free compressed air.
b. Inspect all valve and plug bores for scores. Check all fluid passages for obstructions. Inspect the check valve for free movement. Inspect all mating surfaces for burrs or distortions. Inspect all plugs and valves for burrs or scores. Use crocus cloth to polish valves and plugs with the cloth.
c. Inspect all springs for distortion. Check all valves and plugs for free movement in their respective bores. Valves and plugs, when dry. must fall from their own weight in their respective bores.
d. Roll the manual valve on a flat surface to check for bent condition.
2. Attach and lock the selector lever connecting rod (Z- Link) to the manual valve and ease the control body into the case.

CAUTION: Use care not to bend selector lever connecting rod (Z-Link).

3. Insert the correct length bolts, fingertight, in holes A and B to position the control body to the case.
4. Insert all remaining bolts (correct length) except the filter screen bolt and tighten to specification.
5. Remove the bolt from hole A and install the detent spring to bolt, then reassemble and tighten A and B locations to specification.
6. Install the low-reverse servo cover, piston, spring and gasket.
7. Connect the two clutch converter solenoid wires.
8. Clean the filter screen with solvent. Then install the filter screen 0-ring and filter screen.
9. Using a new gasket, install the fluid pan. Tighten the retaining bolts to 11-13.5 N.m (8-10 ft-lb).
10 Lower the vehicle and till the transmission with the proper grade and quantity of fluid. Pour in three quarts of fluid; then run the engine and add fluid as required.
11. Operate the vehicle and check for leaks.