ZF 5 Speed Gearbox S5-18/3 Complete - Martin Jones Box FIA Historic Spec

The ZF 5 Speed Gearbox S5-18/3 Complete, known as the Martin Jones Box FIA Historic Spec, is a precision-engineered transmission unit designed for historic racing applications. This gearbox features five forward speeds, providing a range of gear ratios suitable for various racing conditions. Constructed with durable materials, it is built to withstand the rigors of competitive motorsport while maintaining reliable performance. The complete assembly typically includes the gearbox housing, internal gears, shafts, and associated components, all manufactured to meet FIA historic specifications. This gearbox is commonly used in classic race cars where authenticity and compliance with historic racing regulations are essential. Its design emphasizes robustness and smooth gear changes, making it a key component for drivers seeking a balance of performance and reliability in vintage motorsport events.