The P-type overdrive marked the last updates and included both a Gear Vendors U.S. The J-type overdrive was introduced in the early 1970s, and was adapted to fit Volvo, Triumph, Vauxhall/Opel, American Motors and Chrysler motorcars, and Ford Transit vans. In 1959, the Laycock Engineering Company introduced the D-type overdrive, which was fitted to a variety of motor cars including Volvo 1s, Sunbeam Alpines and Rapiers, Triumph Spitfires, and also 1962-1967 MGBs (those with 3-synchro transmissions).įrom 1967 the LH-type overdrive was introduced, and this featured in a variety of models, including 1968-1980 MGBs, the MGC, the Ford Zephyr, early Reliant Scimitars, TVRs, and Gilberns. Later the A-type overdrive was to be fitted to the entire range of TR cars. Several famous marques used A-type overdrives, including Jaguar, Aston Martin, Ferrari, Austin-Healey, Jensen, Bristol, AC and Armstrong Siddeley. The first unit to be created was the A-type overdrive, this was fitted to many sports cars during the 1950s.
"The first production vehicle to feature the Laycock system was the 1948 Standard Vanguard Saloon. As one or two of you may know I was having overdrive problems just before the last 10CR and tried (unsuccessfully) to fix it at the time.Īfter the run when it gave up completely I started to look around for a replacement unit and found this info on wikipedia,
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