SX Customs service
Gearbox tuning helps the transmission keep up with extra torque and can improve shift speed, response and everyday drivability.
Professional tuning
Gearbox tuning helps the transmission keep up with extra torque and can improve shift speed, response and everyday drivability.
SX Customs works with vehicle owners across Essex who want better response, stronger drivability and clear advice before software work is carried out.
Why it matters
We ask for vehicle details, engine, usage and goals before recommending the best option.
Support across Chelmsford, Basildon, Brentwood, Southend, Thurrock and nearby towns.
Straightforward guidance on what is suitable and what should be checked first.
FAQs
Yes, many vehicles benefit from ECU and gearbox tuning together.
Availability depends on gearbox type and vehicle support.
The aim is improved response while keeping good drivability.
Ready to tune your vehicle?
Message us with your registration, engine size, current modifications and what you want from the vehicle.