Appointed Allison Transmission's Sole Direct Dealer for the UK Formed over 45 years ago, Powertrain is still a family owned business supporting both the Passenger Transport and Road Haulage industries. Powertrain offer an extensive range of service exchange transmissions and axles, together with a mobile service support team covering the whole of the UK from the highlands of Scotland to the southern most parts of the country. Our mobile service technicians are equipped to carry out the removal and re-fitment of exchange units (both transmissions and axles) and also fault diagnosis on a wide range of products.