Used transmission control module prices

Across 179 vehicle-specific guides with current pricing, used transmission control module guide medians run from $85 to $224, with a typical median of $120. Condition grade, mileage, and fitment move the price within that range.

Usually, yes. Buying a used transmission control module from a salvage yard or auto recycler typically costs a fraction of the new transmission control module replacement cost at a dealership. Compare the grade-level medians above against any replacement quote you've received, and remember our figures exclude shipping and installation labor.

Salvage yards, junkyards, pick-and-pull lots, and online used parts marketplaces all sell used transmission control modules. Our index tracks asking prices nationally, so you can benchmark a local quote against the market range before you buy.

Expect to pay toward the upper half of the $85–$224 range for a grade-A transmission control module with low mileage. Check the grade table above for the current grade-level medians, and confirm whether shipping and any core charge are included in the quote.

They can be — condition grade is the key. Grade A parts come off low-mileage vehicles with little to no damage, grade B is average, and grade C or ungraded parts are the gamble. Buy grade A or B from a yard that offers a return window or warranty, and confirm the mileage of the donor vehicle before paying. The grade-level medians above show what each tier should cost.

Yes. A tcm is another name for a transmission control module. Other common names include transmission computer, transmission module, tcu. The prices on this page apply regardless of what it's called in your region or by your mechanic.

No — the Transmission Control Module (TCM) manages shift points, shift quality, and torque converter lock-up for an automatic transmission, while the engine computer (ECM/PCM) manages engine functions like fuel and ignition. Some vehicles combine both jobs into a single PCM, but many use genuinely separate modules with separate connectors and part numbers. Confirm which module your vehicle actually uses — ideally verified against your VIN — before buying a used replacement, since the two aren't interchangeable.

A bad TCM causes harsh gear shifting, delayed engagement, slipping, or lockup in a single gear known as limp mode. Diagnostic scan tools will often show transmission communication loss codes or solenoid circuit fault errors.

In many modern vehicles, a used TCM must be flashed with your car's exact VIN, axle ratio, and tire calibration parameters to operate correctly. Installing an unprogrammed salvage module can cause harsh shifting, transmission error codes, or complete failure to engage gears.

Verify that the hardware part number and suffix letter code on the module casing match your original unit exactly. Inspect the pin header for bent terminals, oil contamination from leaking transmission wiring harnesses, or signs of water intrusion damage.

TCMs can be mounted inside the passenger cabin under the dash, under the hood near the battery, or mounted directly onto the transmission case inside the oil pan. Modules mounted externally are prone to road corrosion, while internal modules can suffer thermal oil damage.

Used OEM TCMs contain original factory circuit assemblies and untampered microprocessors, offering reliable service at a lower cost than remanufactured alternatives. Rebuilt modules often suffer from poor solder repairs that fail under heat cycle stress.

Yes, automatic transmission fluid can wick up through internal harness wires into the TCM connector plug, causing electrical shorts and signal interference. Always inspect and replace leaking transmission case harness connector seals before plugging in your replacement used TCM.