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.
Test Procedure
If a No Forward, No REVERSE, or Will Not Move condition occurs:
- Disconnect the C1 connector, GREY, at the transmission control module (TCM).
- Set the parking brake.
- Apply the service brake.
- Start the engine and move the range selector to REVERSE position.
The transmission should engage REVERSE range.
Next, move the range selector to the D4 position. The transmission should engage THIRD range
If REVERSE and THIRD range are available in Limp Home Mode, an electrical failure may be indicated. If only one of the two ranges, or neither, was obtainable, this may indicate an internal hydraulic failure such as:
- Failed clutch
- Stuck valve
- Solenoid failure
The clutches that could possibly have an indicated failure in Limp Home are the 1-2-3-4 clutch, the 3rd, 5th and reverse clutch, and the low and reverse clutch.
NO RELATED
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.