What Is a Transmission Control Module for a Car?

A transmission control module uses computerized technology to regulate shifting.

The transmission module is a computerized auto part that controls shifting on vehicles with automatic transmissions. It is the rear compartment of the engine, behind the firewall.

Gear Changes

The transmission control module receives data from the engine control unit that it uses to regulate when and how a vehicle changes gears.

Sensor Controls

Signals are sent from sensors to the transmission control module. In return, the module sends signals to the lock-up clutch, a mechanism that regulates fuel efficiency and power.

Memory

Because the transmission module is computerized, it can store various information about a vehicle's transmission system. It uses the stored information to adjust shifting according to driving conditions.

Symptoms

A faulty transmission module can cause a delay in acceleration when the gas pedal is pressed. Also, when the car is shifted into drive, it may sound as if it is still in neutral.

References

• Ken-Gilbert: Transmission Control Module
• Get Used Parts: Used Auto Parts