4R100

Main Control Valve Body-Accumulator Body, Solenoid Body

Material

Removal

NOTE: If the transmission has been disassembled to replace worn or damaged parts, and the valves in the main control valve body stick repeatedly from foreign material, the torque converter must be removed and cleaned by using a suitable torque converter/fluid cooler cleaner.

All vehicles
1. With the vehicle in NEUTRAL position it on a hoist.

2. Remove the transmission fluid level indicator.

3. CAUTION: Check the electrical connectors for terminal condition, corrosion and contamination. Repair or install new as required.
Disconnect the digital transmission range (TR) sensor connector.

4. CAUTION: Check the electrical connectors for terminal condition, corrosion and contamination. Repair or install new as required.

Disconnect the connector.

Vehicles equipped with a fluid pan drain plug

5. Remove the drain plug and allow the fluid to drain.

6. NOTE: Do not discard the gasket unless damaged. This is a reusable gasket.

Remove the transmission fluid pan and the gasket.

Vehicles not equipped with a fluid pan drain plug

7. NOTE: Do not discard the gasket unless damaged. This is a reusable gasket.

Drain the fluid and remove the transmission fluid pan and the gasket.
1. Loosen, but do not remove, the bolts.
2Remove the front and side bolts.
3. Lower the front of the fluid pan and allow the fluid to drain.
4. Remove the remaining bolts and the fluid pan.

All vehicles

8. NOTE: After removal, discard the filter and seal assembly.

Remove the filter and seal assembly by carefully pulling and rotating the filter as necessary.

9. CAUTION: Be careful not to scratch or damage the aluminum bore. The new seal may leak.

If the seal remains in the pump bore, remove it carefully with a small screwdriver so as not to scratch or damage the aluminum bore.

10. Remove the accumulator body bolts and nuts.

11. CAUTION: Prevent the front of the valve body separator plate from sagging and displacing the check balls.

If the valve body separator plate is not being repaired:
1. Remove the bolt.
2. Install bolt into any case threaded bolt hole on the opposite end of the separator plate.

12. NOTE: Do not remove the lower-to-upper main control valve body assembly retaining bolts. Keep the main control valve bodies attached as an assembly.

Remove the main control valve body.
1. Do not remove the lower-to-upper main control valve body bolts.

13. Remove the solenoid body assembly.
1. Remove the bolts.
2. Remove the nut.
3. Remove the solenoid body assembly.

14. Remove the solenoid screen assembly by rotating and pulling it.

15. CAUTION: The steel electronic pressure control (EPC) check ball is spring-loaded under the valve body separator plate.

If replacing the valve body separator plate, remove the bolts and the separating plate reinforcing plate.

16. Lower the valve body separator plate and the gaskets carefully, to retain the rubber check balls and the steel EPC check ball and spring assembly.

Installation

CAUTION: Using the incorrect gasket can cause damage to the transmission.

All vehicles

1. NOTE: If the valve body separator plate was not removed, proceed to Step 6.

NOTE: Apply a light film of petroleum jelly to the valve body separator plate prior to assembling the new gaskets.

Assemble the new gaskets to the valve body separator plate.
1. Main control to case gasket.
2. Valve body separator plate.
3. Main control to separator plate gasket.

2. NOTE: Apply a small amount of petroleum jelly to each check ball prior to positioning them on the valve body separator plate.

Install eight rubber and one steel, EPC check balls.

3. NOTE: Apply petroleum jelly to the EPC check ball spring prior to installing it into the case.

Install the EPC check ball spring.

4. Position the valve body separator plate and the gaskets to the case carefully, to retain the check balls.

5. NOTE: The word UP stamped on the separator plate reinforcing plate must be visible when installed.

Install the separator plate reinforcing plate.
1. Install the separator plate reinforcing plate.
2. Install the retaining bolts.

6. Install the solenoid screen assembly by pushing it in and rotating it to lock.

7. NOTE: Prior to installing the solenoid body assembly, coat the case connector bore with silicone grease.

Install the solenoid body assembly.
1. Install the solenoid body assembly.
2. Install the nut.
3. Install the bolts and nut finger-tight.

8. Install the main control valve body, aligning the manual shift valve with the inner manual valve detent lever. Install the nuts and bolts finger-tight.

9. If previously installed, remove, then reinstall, the bolt into the separator plate reinforcing plate.
1. Remove the bolt.
2. Install the bolt.

10. Install the accumulator body with the nuts and the bolts finger-tight.

11. Tighten all accumulator body, upper and lower main control body and the solenoid body nuts and bolts.

12. CAUTION: Make sure that the pump bore is clean and the old filter seal has been removed.

NOTE: Prior to installation, lightly lubricate the seal with clean automatic transmission fluid.

Press the fluid filter and seal assembly into the pump bore until seated.

13. NOTE: Do not discard the gasket unless damaged. This is a reusable gasket.

NOTE: Apply a light coat of petroleum jelly to hold the gasket to the fluid pan.

Position the gasket onto the clean fluid pan. Make sure the magnet is positioned over the dimple in the fluid pan.

14. CAUTION: Mixing the 4x2-style and 4x4-style transmission fluid filters and transmission pan assembly components can cause transmission damage.

Install the correct pan with gasket for this application. Alternately tighten the bolts.

Vehicles equipped with a fluid pan drain plug

15. Install the drain plug.

All vehicles

16. Connect the digital transmission range (TR) sensor connector.

17. Connect the solenoid body connector.
18. Remove the supports and lower the vehicle.
19. Fill the transmission to the specified level with clean automatic transmission fluid.