Jims Transmission Parts

19 products — part of all Transmission Parts

Trusted by professional Harley-Davidson workshops for decades, Jims produce precision-engineered transmission components machined to exacting tolerances for HD V-twin gearboxes. Their range covers 4-speed Big Twin classics, 5-speed evolutions, and Sportster applications from the K model era onwards, with particular depth across 80–06 five-speed Big Twins. Whether you are rebuilding a worn gearbox or replacing individual internals, Jims parts deliver the fit and durability that demanding transmission work requires — no compromises on the components that keep your drivetrain operating correctly.