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Transmission Control Units – Advanced Gearbox Management for Your Vehicle

Transmission control units (ECU/TCU) are essential components in modern vehicles, responsible for the precise operation of automatic and semi-automatic gearboxes. A gearbox control unit is a sophisticated computer that collects signals from various sensors – such as speed, engine RPM, temperature, or driving style – and uses them to determine optimal gear changes and adjust transmission operation for current road conditions.

Failures of gearbox control units can cause serious malfunctions. Below are typical warning signs:

  • Improper gear shifting – jerks, delays, or being stuck in one gear.
  • Dashboard warnings – error messages or the "check engine" light.
  • Gearbox limp mode – automatic gear restriction to prevent damage.
  • No response when shifting – the unit may block gear selection.
  • Incorrect sensor readings – signal errors lead to unpredictable behavior.

Frequently Asked Questions About Gearbox Control Units

1. What are the symptoms of a faulty gearbox control unit?
Common symptoms include erratic gear shifting, limp mode activation, inability to move, or total loss of gears, often with error codes or dashboard lights.

2. Can a faulty gearbox ECU be repaired, or must it always be replaced?
Many units can be repaired or refurbished depending on the failure, such as component replacement, software update, or fixing faulty connections.

3. What causes gearbox control unit failures?
Typical reasons include voltage surges, water ingress, overheating, manufacturing defects, or component wear.

4. How do I select the right controller for my car?
Match the part number and technical specifications to your vehicle and transmission type. Specialist advice or diagnostic checks are recommended if unsure.

Our Shop’s Gearbox Control Unit Offer

Our range includes gearbox control units for various passenger vehicles, vans, and trucks. We provide products from trusted brands, ensuring reliability and compatibility. All units are tested and ready for installation – both new and refurbished.
Choosing the right controller guarantees optimal gearbox performance and quicker repairs. We offer technical support, advice, and pre-purchase diagnostics to ensure the right selection.
Check our wide selection or contact us for technical questions – our automotive specialists are happy to help you find the perfect part!