Your gearbox is one of the most complex and hardworking components of your vehicle – and when it’s looked after properly, it ensures smooth gear changes, optimal power delivery, and long-term reliability. At Onyx Performance in Langley, Slough, we provide specialist gearbox servicing for both manual and automatic transmissions, including dual-clutch (DSG), CVT, and high-performance systems.

Our expert technicians use advanced diagnostic tools, precision fluid exchange equipment, and manufacturer-approved service procedures to keep your gearbox operating at its best. Whether it’s a sports car, luxury saloon, or commercial vehicle, we treat every transmission with the same attention to detail.

Drivers from Slough, Langley, and across Berkshire choose us for our technical expertise, transparent approach, and fast turnaround times. From preventative maintenance to addressing shifting issues, we make sure your gearbox delivers the performance and reliability your vehicle was built for.