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.
Control Valve Assembly
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Electric oil pump |
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TCM |
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System pressure control valve |
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Shift rod control valve A |
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Intermediate panel |
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Shift valve body |
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Valve housing |
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Shift rod control valve C |
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Shift rod control valve B |
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K1 clutch regulation valve |
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K2 clutch regulation valve |
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Park pawl switchover valve |
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Gear cylinder pressure valve |
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Shift rod control valve D |
The task of the TCM is to receive and evaluate incoming electrical status and actuate the control/switchover valves of the TCM accordingly. Via the control/switchover valves and the downstream control/shift valves (integrated in the shift valve body), the hydraulic flow to the respective gear actuator cylinders, the clutches and the park pawl system is enabled in order to initiate the gear (range) change.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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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