Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2003 Ford ZX2 AutomaticFACTORY OEM SERVICE PROCEDURE

Main Control Valve Body - Assembly: Disassembly

CAUTION: Handle the main control valve body carefully. If any of the components are damaged, it may become the cause of malfunctions in the transmission.

Remove the (A) fluid bypass tube bolts and the (B) fluid bypass tube. Remove the O-rings and seals from the fluid bypass tube and discard them.

Fig 1: Removing Fluid Bypass Tube Bolts
Courtesy of FORD MOTOR CO.
Remove the electrical solenoids.
1. Remove the bolts.
2. Remove the torque converter clutch (TCC) solenoid.
3. Remove the 1-2 shift solenoid.
Fig 2: Removing Electrical Solenoids
Courtesy of FORD MOTOR CO.
Remove the 2-3 shift solenoid and the 3-4 shift solenoid.
1. Remove the 2-3 shift solenoid bolt.
2. Remove the 3-4 shift solenoid bolt.
3. Remove the 2-3 shift solenoid and the 3-4 shift solenoid.
4. Remove the shift solenoid wiring harness bolt.
Fig 3: Removing 2-3 Shift Solenoid And 3-4 Shift Solenoid
Courtesy of FORD MOTOR CO.

NOTE: Loosen the upper control valve body bolts evenly and gradually.

Factory Service Tools

Use the Manual With the Right Hardware

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.

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