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.
Transmission Control Module (ALLISON): Installation
Connect the TCM electrical connectors to the TCM. Install the TCM to the cover. Using the alignment tabs, install the cover and module to the radiator shroud. Install the TCM cover bolts to the radiator shroud. Tighten the bolts to specification. See TORQUE SPECIFICATIONS . Connect the negative battery cable. Reprogram the TCM. See TRANSMISSION CONTROL MODULE under PROGRAMMING.
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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.