Gearbox re-mapping, also known as TCU remapping, is a process that modifies a vehicle's transmission control unit (TCU) software to improve performance:

Faster gear changes: Increase the speed at which the gearbox changes gear

More torque: Increase the torque limiters to ensure the transmission doesn't limit the engine's performance

Improved shift points: Customize the shift points to enhance the driving experience

Better economy: Improve the vehicle's fuel economy Gearbox re-mapping is different from a gearbox update. It's a software change that can be made without adding or changing any hardware. The process typically involves accessing the map stored in the vehicle's electronic control unit (ECU) via the onboard diagnostics port (OBD). For some newer models, the ECU may need to be removed for modification.

Here are some places that offer gearbox re-mapping services: