Transfer Case Control Modules (TCCM)
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OEM transfer case control modules (TCCMs) for 4x4 and AWD trucks and SUVs from Ford, GM, Dodge, and other domestic vehicles. The TCCM manages electronic transfer-case shifting between 2WD, 4WD-High, and 4WD-Low ranges. Each module is bench-tested before shipping. Find your part number on the module label and search to confirm fitment.
Diagnosing a bad transfer case control module? Why they fail and what to do →
Common questions
What does a Transfer Case Control Module (TCCM) do?
The TCCM runs the electronic 4WD/AWD transfer case. It reads your 2H/4H/4L selector — a switch or dial — and commands the shift motor and clutch to engage the right range. On electronic-shift 4WD systems, it's what makes the mode change actually happen.
What are the symptoms of a failing TCCM?
Four-wheel drive that won't engage or disengage, flashing 4x4 mode lights, a "service 4WD" message, or the system stuck in one range. Sometimes the mode lights cycle or blink without the transfer case actually shifting.
How do I get the right TCCM, and does it need programming?
Match the OEM part number — TCCMs vary by transfer-case type and platform. Some are plug-and-play with an exact part-number match; others need programming or calibration. Message us your VIN and your old part number and we'll tell you which yours is.
Why buy a used OEM TCCM?
It's the correct control for your specific transfer case, so a tested OEM unit restores factory 4WD behavior. Every module we sell is pulled, inspected, and tested for functionality before listing.