Valve Body: Service and Repair

Valve Body and ATF Strainer Removal





1. Remove the three ATF feed pipes (A) from the regulator valve body (B), four pipes (C) from the top accumulator body (D). one pipe (E) from the servo body (F), and one 10 mm pipe (G) from the accumulator body (H).
2. Remove the servo detent base (I) (two bolts).
3. Remove the ATF strainer (J) (two bolts).
4. Remove the top accumulator body (D) (seven bolts), then remove the top accumulator body separator plate (K) and two dowel pins.
5. Remove the servo body (F) (five bolts), then remove servo separator plate (L) and two dowel pins.
6. Remove the regulator valve body (B) (eight bolts).
7. Remove the stator shaft (M) and stator shaft stop (N).
8. Remove the regulator separator plate (O) and two dowel pins.
9. Remove the accumulator body (H) (seven bolts).
10. Unhook the detent spring (P) from the detent arm (Q), then remove the detent arm shaft (R), detent arm, and control shaft (S).
11. Remove the cooler check valve spring (T) and cooler check valve
12. Remove the main valve body (V) (four bolts).
13. Remove the torque converter check valve (W) and valve spring (X).
14. Remove the ATF pump driven gear shaft (Y), then remove the ATF pump gears (Z).
15. Remove the main separator plate (AA) and three dowel pins.
16. Remove shift solenoid valves (BB) (CC) (DD) and torque converter clutch solenoid valve (EE) from the torque converter housing.





17. Clean the inlet opening (A) of the ATF strainer (B) thoroughly with compressed air, then check that it is in good condition and that the inlet opening is not clogged.
18. Test the ATF strainer by pouring clean ATF through the inlet opening, and replace it if it is clogged or damaged.

Valve Body Repair

NOTE: This repair is only necessary if one or more of the valves in a valve body do not slide smoothly in their bores. Use this procedure to free the valves.

1. Soak a sheet of #600 abrasive paper in ATF for about 30 minutes.
2. Carefully tap the valve body so the sticking valve drops out of its bore. It may be necessary to use a small screwdriver to pry the valve free. Be careful not to scratch the bore with the screwdriver.
3. Inspect the valve for any scuff marks. Use the ATF-soaked #600 paper to polish off any burrs that are on the valve, then wash the valve in solvent and dry it with compressed air.





4. Roll up half a sheet of ATF-soaked #600 paper and insert it in the valve bore of the sticking valve. Twist the paper slightly, so that it unrolls and fits the bore tightly, then polish the bore by twisting the paper as you push it in and out.

NOTE: The valve body is aluminum and doesn't require much polishing to remove any burrs.

5. Remove the # 600 paper. Thoroughly wash the entire valve body in solvent, then dry it with compressed air.





6. Coat the valve with ATF, then drop it into its bore. It should drop to the bottom of the bore under its own weight. If not, repeat steps 4 and 5, then retest. If the valve still sticks, replace the valve body.
7. Remove the valve, and thoroughly clean it and the valve body with solvent. Dry all parts with compressed air, then reassemble using ATF as a lubricant.

Valve Body Valve installation
1. Coat all parts with ATF before assembly.





2. Install the valves and springs in the sequence shown for the main valve body, regulator valve body, servo body, and top accumulator body. Refer to the following valve cap illustrations, and install each valve cap so the end shown facing up will be facing the outside of the valve body.





3. Install all the springs and seats. Insert the spring (A) in the valve, then install the valve in the valve body (B). Push the spring in with a screwdriver, then install the spring seat (C).

Main Valve Body Disassembly, Inspection, and Reassembly
1. Clean all parts thoroughly in solvent or carburetor cleaner, and dry them with compressed air. Blow out all passages.
2. Do not use a magnet to remove the check ball, it may magnetize the ball.
3. Inspect the valve body for scoring and damage. Replace the valve body as an assembly if any parts are worn or damaged.
4. Check all valves for free movement. If any fail to slide freely, refer to valve body repair.
5. Coat all parts with ATF during assembly.





6. Install the new filter in the direction shown.





SPRING SPECIFICATIONS

ATF Pump Inspection





1. Install the ATF pump drive gear (A), driven gear (B), and ATF pump driven gear shaft (C) in the main valve body (D). Lubricate all parts with ATF, and install the ATF pump driven gear with its grooved and chamfered side facing up.





2. Measure the side clearance of the ATF pump drive gear (A) and driven gear (B).





3. Remove the ATF pump driven gear shaft. Measure the thrust clearance between the ATF pump driven gear (A) and the valve body (B) with a straight edge (C) and a feeler gauge (D).

Regulator Valve Body Disassembly, Inspection, and Reassembly
1. Clean all parts thoroughly in solvent or carburetor cleaner, and dry them with compressed air. Blow out all passages.
2. Inspect the valve body for scoring and damage.
3. Check all valves for free movement. If any fail to slide freely, refer to valve body repair.
4. Replace the valve body as an assembly if any parts are worn or damaged.
5. Hold the regulator spring cap in place while removing the stop bolt. The regulator spring cap is spring goaded. Once the stop bolt is removed, release the spring cap slowly so it does not pop out.
6. Reassembly is the reverse of disassembly. Install the filter in the direction shown.
7. Coat all parts with ATF during assembly.
8. Align the hole in the regulator spring cap with the hole in the valve body, then press the spring cap into the valve body, and tighten the stop bolt.





9. Install the new filter in the direction shown.





SPRING SPECIFICATIONS

Servo Body Disassembly, Inspection, and Reassembly
1. Clean all parts thoroughly in solvent or carburetor cleaner, and dry them with compressed air. Blow out all passages.
2. Inspect the servo body for scoring and damage. Replace the valve body as an assembly if any parts are worn or damaged.
3. Check all valves for free movement. If any fail to slide freely, refer to valve body repair.





4. Coat all parts with ATF during reassembly.





SPRING SPECIFICATIONS

Top Accumulator Body Disassembly, Inspection, and Reassembly
1. Clean all parts thoroughly in solvent or carburetor cleaner, and dry them with compressed air. Blow out all passages.
2. Inspect the top accumulator body for scoring and damage. Replace the valve body as an assembly if any parts are worn or damaged.
3. Check all valves for free movement. If any fail to slide freely, refer to valve body repair.





4. Coat all parts with ATF during assembly.





SPRING SPECIFICATIONS

Accumulator Body Disassembly, Inspection, and Reassembly
1. Do not use a magnet to remove the check balls; it may magnetize the balls.
2. Inspect the accumulator body for scoring and damage.
3. Clean all parts thoroughly in solvent or carburetor cleaner, and dry them with compressed air. Blow out all passages.





4. Coat all carts with ATF during assembly.





SPRING SPECIFICATIONS

3rd Accumulator and End Cover Disassembly, Inspection, and Reassembly
1. Clean all parts thoroughly in solvent or carburetor cleaner, and dry them with compressed air. Blow out all passages.





2. Coat all parts with ATF during assembly.





SPRING SPECIFICATIONS

Valve Body and ATF Strainer Installation





1. Install the main separator plate (E) and three dowel pins on the torque converter housing (F).





2. Install the ATF pump drive gear (G), driven gear (H), and ATF pump driven gear shaft (I). Install the ATF pump driven gear with the grooved and chamfered side facing down.
3. Install the torque converter check valve (J) and spring (K) in the main valve body (L), then install the main valve body.





4. Make sure the ATF pump drive gear (G) rotates smoothly in the normal operating direction, and the ATF pump driven gear shaft (I) moves smoothly in the axial and normal operating direction.
5. If the ATF pump drive gear and ATF pump driven gear shaft do not move smoothly, loosen the main valve body bolts. Realign the ATF pump driven gear shaft, and retighten the bolts to the specified torque, then recheck. Failure to align the ATF pump driven gear shaft correctly will result in a seized ATF pump drive gear or ATF pump driven gear shaft.
6. Make sure that the check ball (M) and the cooler check valve (N) are in the main valve body, then install the cooler check valve spring (O) on the cooler check valve.
7. Install the regulator separator plate (P) and two dowel pins.
8. Install the new O-ring on the stator shaft (Q), and install it and stator shaft stop (R).
9. Install the regulator valve body (S) (eight bolts).
10. Install the servo separator plate (T) and two dowel pins.





11. Install the control shaft (U) in the torque converter housing along with the manual valve.
12. Install the detent arm (V) and arm shaft (W) in the main valve body (L), then hook the detent arm spring (X) to the detent arm.
13. Install the servo body (Y) (five bolts).
14. Install the top accumulator separator plate (Z) and two dowel pins, then install the top accumulator body (AA) (seven bolts).
15. Install the new O-ring on the ATF strainer (BB), and install it in the top accumulator body (two bolts).
16. Install the servo detent base (CC) (two bolts).
17. Install the accumulator body (DD) (seven bolts).
18. Install the 8 x 198 mm pipe, and three 8 x 85 mm pipes in the regulator valve body.
19. install two 8 x 180.5 mm pipes, and two 8 x 62 mm pipes in the top accumulator body.
20. Install the 8 x 220 mm pipe in the servo body.
21. Install the 10 x 60 mm pipe in the accumulator body
22. Install shift solenoid valves A, B, C, and torque converter clutch solenoid valve (D) with new O-rings.