Hewland's first Grand Prix victory was with Dan Gurney driving a Brabham BT7 in the French GP, 28th June 1964 (Click on the picture to enlarge) Type Year Remarks Mk1 1960 Slight modification of standard VW gearbox. 12 made for Lola only. Mk2 1961 Used by Elva, with more modifications. Mk3 1962 Now with Hewland five speed loose gear cluster. More widely available. Mk4 1963 Ford free diff fitted in Hewland sideplates 4 speed using Mk8 gears. The gearbox that really launched Hewland Engineering. H.D.4 1963 to 1965 The first Hewland designed unit! Cam and pawl L.S.D. First used on Brabhams with 2.7 litre Climaxes, 4 speed. H.D.5 1963 to 1965 As H.D.4 but 5 speed. Mk5 1963 5 speed, used as an early F3 gearbox with heavy duty gears. Utilised modified VW crownwheel and pinion and Ford Cortina differential. Mk6 1963 4 speed version of Mk4 gearbox. L.G. 500 1966 The biggest ever Hewland box; for Can-Am and large sports cars. Four or five speed. 2 speed version (LG2) produced for Lola; Indianapolis 500. LG 600 1966 6 speed version of th L.G. 500 Mk7 1968/9 Six speed version for 1000cc F2. FT 200 1966 Evergreen five speed unit for F2. DG 300 1966 Evergreen five speed for F1/ Sports cars Mk8 1968 Only the VW maincasing used. All other parts by Hewland. LSD option. FG 400 1968 Five speed prompted by DFV F1 era. FGA 1972 Development of FG. Six speed version also. Mk9 1973 Lobro type output joints. Slide on first gear. FGB 1978 New maincase to take larger Crown wheel and pinion. (Lower ratio for higher revving engines). DGB 1981 Sportscar endurance. Full oil system, strong case. VG 1981 As DGB concept but bigger. VGC 1986 Uprated version of the VG. LD 200 1988 A totally new unit, designed to replace Mk9 with a neat modern solution. Four or five speed versions. Note: This is not a current product list (see `gearbox range` page), but simply a record of historic interest. The gearboxes are described in their original specifications. Some are still made but in evolved formats. The above were / are 'publicly available'. Not included in the list are the many specialised bespoke projects that were undertaken for customers, such as rally transmissions, F1 and Indycar hybrids etc. The enormous amount of new transmissions (mainly bespoke) that have been designed since the early 1990`s would make this list tenfold in length so above is the `first thirty years` of Hewland Engineering.