The combination of an imported Borg-Warner DG (Detroit Gear) 250M automatic transmission, power steering and Dunlop's power disc brakes on all wheels made the Major in those respects a mechanically advanced car for its time. Its body, however, was originally designed for the Majestic by Daimler subsidiary, the old coachbuilding firm Carbodies and they provided the bodies in conjunction with Park Sheet Metal. They were finished in cellulose paints allowing a selection of colours not available in the new synthetic finishes used by Jaguar. They were built at Browns Lane on separate hand-moved lines.