Part 3

CONTROL VALVE ASSEMBLY





DISASSEMBLY





1. Remove solenoids.
a. Remove torque converter clutch solenoid valve and side plate from lower body.
b. Remove O-ring from solenoid.





c. Remove line pressure solenoid valve from upper body.
d. Remove O-ring from solenoid.





e. Remove 3-unit solenoid assembly from upper body.
f. Remove O-rings from solenoids.





2. Disassemble upper and lower bodies.
a. Place upper body face down, and remove bolts, reamer bolts and support plates.
b. Remove lower body, separator plate and separate gasket as a unit from upper body.
- Be careful not to drop pilot filter, orifice check valve, spring and steel balls.





c. Place lower body face down, and remove separate gasket and separator plate.
d. Remove pilot filter, orifice check valve and orifice check spring.





e. Check to see that steel balls are properly positioned in upper body. Then remove them from upper body.

INSPECTION





Lower and Upper Bodies
- Check to see that there are pins and retainer plates in lower body.





- Check to see that there are pins and retainer plates in upper body.
- Be careful not to lose these parts.





- Check to make sure that oil circuits are clean and free from damage.
- Check tube brackets and tube connectors for damage.





Separator Plates
- Make sure that separator plate is free of damage and not deformed and oil holes are clean.





Pilot Filter
- Check to make sure that filter is not clogged or damaged.





Torque Converter Clutch Solenoid Valve
- Check that filter is not clogged or damaged.
- Measure resistance.





Line Pressure Solenoid Valve
- Check that filter is not clogged or damaged.
- Measure resistance.





3-Unit Solenoid Assembly (Overrun Clutch Solenoid Valve and Shift Solenoid Valves A and B)
- Measure resistance of each solenoid.





A/T Fluid Temperature Sensor
- Measure resistance.

ASSEMBLY





1. Install upper and lower bodies.
a. Place oil circuit of upper body face up. Install steel balls in their proper positions.





b. Install reamer bolts from bottom of upper body and install separate gaskets.





c. Place oil circuit of lower body face up. Install orifice check spring, orifice check valve and pilot filter.





d. Install lower separate gaskets and separator plates on lower body.
e. Install and temporarily tighten support plates, fluid temperature sensor and tube brackets.





f. Temporarily assemble lower and upper bodies, using reamer bolt as a guide.
- Be careful not to dislocate or drop steel balls, orifice check spring, orifice check valve and pilot filter.





g. Install and temporarily tighten bolts and tube brackets in their proper locations.





2. Install solenoids.
a. Attach O-ring and install torque converter clutch solenoid valve and side plates onto lower body.





b. Attach O-rings and install 3-unit solenoids assembly onto upper body.





c. Attach O-ring and install line pressure solenoid valve onto upper body.
3. Tighten all bolts.





CONTROL VALVE UPPER BODY

DISASSEMBLY





1. Remove valves at parallel pins.
- Do not use a magnetic hand.





a. Use a wire paper clip to push out parallel pins.





b. Remove parallel pins while pressing their corresponding plugs and sleeves.
- Remove plug slowly to prevent internal parts from jumping out.





c. Place mating surface of valve face down, and remove internal parts.
- If a valve is hard to remove, place valve body face down and lightly tap it with a soft hammer.
- Be careful not to drop or damage valves and sleeves.





2. Remove valves at retainer plates.
a. Pry out retainer plate with wire paper clip.





b. Remove retainer plates while holding spring.





c. Place mating surface of valve face down, and remove internal parts.
- If a valve is hard to remove, lightly tap valve body with a soft hammer.
- Be careful not to drop or damage valves, sleeves, etc.





- 4-2 sequence valve and relay valve are located far back in upper body. If they are hard to remove, carefully push them out using stiff wire.
- Be careful not to scratch sliding surface of valve with wire.

INSPECTION
Valve Springs









- Measure free length and outer diameter of each valve spring. Also check for damage or deformation.

Inspection standard: Refer to image.

- Replace valve springs if deformed or fatigued.

Control Valves
- Check sliding surfaces of valves, sleeves and plugs.

ASSEMBLY





1. Lubricate the control valve body and all valves with ATF. Install control valves by sliding them carefully into their bores.
- Be careful not to scratch or damage valve body.





- Wrap a small screwdriver with vinyl tape and use it to insert the valves into proper position.





Pressure Regulator Valve
- If pressure regulator plug is not centered properly, sleeve cannot be inserted into bore in upper body.
If this happens, use vinyl tape wrapped screwdriver to center sleeve until it can be inserted.
- Turn sleeve slightly while installing.





Accumulator Control Valve
- Align protrusion of accumulator control sleeve with notch in plug.
- Align parallel pin groove in plug with parallel pin, and install accumulator control valve.





2. Install parallel pins and retainer plates.





- While pushing plug, install parallel pin.





4-2 Sequence Valve and Relay Valve
- Push 4-2 sequence valve and relay valve with wire wrapped in vinyl tape to prevent scratching valve body. Install parallel pins.





- Insert retainer plate while pushing spring.