Valve Body Disassemble & Service
Valve BodyValve Body and ATF Strainer Removal
1. Remove the ATF feed pipe (A) from the regulator valve body (B).
2. Remove the ATF feed pipes (C) (D) from the servo body (E).
3. Remove the ATF strainer (F) (two bolts).
4. Remove the regulator valve body (10 bolts).
5. Remove the stator shaft (G) and the stator shaft stop (H), then remove the regulator separator plate (I) and the two dowel pins (J).
6. Remove the servo body (11 bolts), then remove the separator plate (K) and the two dowel pins (L).
7. Remove the ATF joint pipes (M) (N).
8. Remove the cooler check valve spring (O) and the cooler check valve (P), then remove the main valve body (Q) (three bolts). Do not let the check balls (R) fall out.
9. Remove the ATF pump driven gear shaft (S), then remove the ATF pump gears (T).
10. Remove the main separator plate (U) and the two dowel pins (V).
11. Remove the ATF magnet (W), clean it and reinstall it in the torque converter housing (X).
12. Remove the O-ring (Y) from the stator shaft, and remove the O-ring (Z) from the ATF strainer. Install new ones when installing the valve bodies.
13. 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.
14. 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: Valve body 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 of the 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, the regulator valve body, and the servo 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, then secure the valve cap with the valve cap clip.
3. Install the valve and the valve spring (A) in the valve body (B). Push the valve 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 balls, it may magnetize the check balls.
3. Inspect the main valve body for scoring and damage.
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.
ATF Pump Inspection
1. Install the ATF pump drive gear (A), the driven gear (B), and the 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 the 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 except the air check valve filter.
2. Inspect the regulator valve body for scoring and damage.
3. Hold the regulator spring cap in place while removing the stop bolt. The regulator spring cap is spring loaded. Once the stop bolt is removed, release the spring cap slowly so it does not pop out.
4. Check all valves for free movement. If any fail to slide freely, refer to valve body repair.
5. Check the air check valve filter for clogging. If the filter is clogged, remove the air check valve, and clean the filter thoroughly by pouring clean ATF. Do not blow out the filter with compressed air. Replace the air check valve, if the filter or the check valve (ball) is clogged or damaged.
6. Coat all parts with ATF during assembly.
7. Align the hole in the regulator spring cap with the stop bolt hole, then press the spring cap into the valve body, and tighten the stop bolt.
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.
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.
Shift Solenoid Valve Removal and Installation
NOTE: Do not hold the solenoid valve connector to remove and install the solenoid valve. Be sure to hold the solenoid valve body.
1. Remove the mounting bolts, then remove the solenoid valves by holding the solenoid valve body.
2. Install the new O-rings (E) on each solenoid valve.
NOTE: A new solenoid valve comes with new O-rings. If you install a new solenoid valve, use the O-rings provided on it.
3. Install shift solenoid valve D (black connector) by holding the shift solenoid valve body; be sure to install the mounting bracket contacts to the servo body.
4. Install shift solenoid valve C (brown connector) by holding the shift solenoid valve body; be sure to install the mounting bracket contacts to the servo body.
5. Install shift solenoid valve B (black connector) by holding the shift solenoid valve body; be sure to install the mounting bracket contacts to the servo body.
6. Install shift solenoid valve A (brown connector) by holding the shift solenoid valve body; be sure to install the mounting bracket contacts to the bracket of shift solenoid valve B.
NOTE: Do not install shift solenoid valve A before installing shift solenoid valve B. If shift solenoid valve A is installed before installing shift solenoid valve B, it may damage the hydraulic control system.
Valve Body and ATF Strainer Installation
1. Make sure that the ATF magnet is cleaned and installed in the torque converter housing.
Valve Body:
2. Install the main separator plate and the two dowel pins on the torque converter housing.
3. Install the ATF pump drive gear (A), the ATF pump driven gear (B), and the ATF pump driven gear shaft (C). Install the ATF pump driven gear with its grooved and chamfered side facing down.
4. Install the main valve body.
5. Make sure the ATF pump drive gear (A) rotates smoothly in the normal operating direction, and the ATF pump driven gear shaft (B) moves smoothly in the axial and normal operating direction.
6. If the ATF pump drive gear and the 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.
7. Make sure that the three check balls and the cooler check valve are in the main valve body, then install the cooler check valve spring in the cooler check valve.
8. Install the ATF joint pipes between the main valve body and the torque converter housing.
9. Install the regulator separator plate and the two dowel pins on the main valve body.
10. Install the new O-ring on the stator shaft, and install the stator shaft and the stator shaft stop.
11. Install the regulator valve body (10 bolts).
12. Install the servo separator plate and the two dowel pins on the main valve body.
13. Install the servo body (11 bolts).
14. If the detent arm was removed, install the detent arm (A) with the arm collar (B) on the servo body (C), and install the new lock washer (D) by aligning its cutout (E) with the projection (F) of the servo body. Install and tighten the bolt, then bend the lock tab (G) of the lock washer against the bolt head.
15. Install the new O-ring on the ATF strainer, and install the ATF strainer (two bolts).
16. Install the 8 x 180.5 mm ATF feed pipe in the regulator valve body.
17. Install the 8 x 192.5 mm ATF feed pipe and the 8 x 180.5 mm ATF feed pipe in the servo body.