Aston Martin V8 Manual Conversion Tremec T56 Magnum 6-Speed

Designed for for 1970’s – 1980’s Aston Martin V8 powered cars.  We have produced a 6 speed manual conversion kit for Aston Martin V8 cars using a new Tremec T56 Magnum 6 speed transmission with a torque rating of 700 lb-ft.

We have a long history of producing transmission packages for a number of engines and our Aston V8 manual conversion kit was produced in collaboration with Aston specialists who helped to detail our package and have advised on the exact requirements for the Aston V8 cars.  Our 6 speed manual package is made to be retrofitted to cars that left the factory originally as automatic.  This manual conversion releases the full potential of the V8 power in the car and transforms the driving experience.  Our package provides the gear shift lever in the correct position and has provision for mechanical speedo cable (for use with the original instruments) together with electronic speedo sensor (should the customer wish to change to electronic instruments).  Our mechanical speedo provision is a true cable drive and so does not require the electronic speedo conversion box that other conversions rely on.

Full details of our package and availability will be released late Spring 2026.

Package will include:

All new Tremec T56 Magnum (we do not use refurbished transmissions)

Roadcraft CNC aluminium bellhousing

Billet steel flywheel

10.5″ clutch cover and disc

ARP clutch bolts

Internal hydraulic release bearing

Roller spigot bearing

Gearbox mount

Gearbox cross member

Gear shift lever

Speedo cable

Propshaft yoke