ECU remapping isn’t just about the engine. Your gearbox has its own computer — the TCU (Transmission Control Unit) — and tuning it can transform how your car drives.
What Is TCU Tuning?
TCU tuning modifies the gearbox software to change how it behaves. We can adjust shift speed, shift points, torque limits, and launch control settings. It works alongside your ECU remap for a complete performance upgrade.
What Does TCU Tuning Do?
- Faster shifts: Gear changes happen quicker, reducing shift time by up to 50%
- Higher torque limits: The gearbox allows more power to pass through without going into protection mode
- Optimised shift points: Holds gears longer under acceleration, shifts earlier when cruising
- Smoother operation: Reduces jerkiness and hesitation in everyday driving
- Launch control: Some cars get improved launch control calibration
Which Gearboxes Can Be Tuned?
- ZF 8-speed (BMW, Jaguar, Land Rover): Excellent response to tuning
- DSG/S-Tronic (VW, Audi, Skoda): Smoother shifts, better launch control
- 9G-Tronic (Mercedes): Faster shifts, torque limit increase
- Torque converter autos: Most modern autos can be tuned
Do I Need TCU Tuning with My ECU Remap?
If you’ve had an ECU remap and your gearbox is automatic, TCU tuning is highly recommended. The extra power from the remap can confuse the stock gearbox calibration, leading to delayed shifts or torque intervention. TCU tuning ensures the gearbox works with the new power, not against it.
Is TCU Tuning Safe?
Yes. We stay within the hardware’s design limits. We’re not asking the gearbox to do more than it can — we’re just removing the software restrictions that hold it back.
How Much Does It Cost?
TCU tuning starts from £180 at MapKings, and can be done alongside your ECU remap in the same session.
Book TCU Tuning
Book your TCU tune alongside your ECU remap. Call 07306 558428.