Triumph TR3A Early gearbox disassembled for conversion to overdrive.
TR3 Gearbox assembled with rebuilt Laycock “A” type bolted up.
TR3 Gearbox with Laycock “A” type bolted up. Top cover rebuild to follow.
Triumph TR3 Top Cover Disassembled.
Triumph TR3 Top Cover Assembled with new isolator switches.
Triumph TR3 Gearbox/Overdrive mounted to test bench. Pressure tested and ready to fit solenoid and clutch components.







where can I find a TR3A gearbox with overdrive and is it possible to give my old one for exchange.