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British engineering company

Hewland is a British engineering company, founded in 1957 by Mike Hewland, which specialises in racing car gearboxes. Hewland currently employ 130 people at their Maidenhead facility and have diversified into a variety of markets being particularly successful in electric vehicle transmission supply. Hewland are currently supplying into Formula 1, Formula E, DTM, LMP, RallyCross, Prototype and GT Sportscar.

The following is the list of the smaller product range housed in Volkswagen case except for LD200. Type Year Rating sp. Weight DescriptionMk. I 19601500cc472 lbsCustom side plates and unequal length output shafts for Lola Mk. IIIMk. II 19611500cc472 lbsCustom for Elva Mk. VI, VW gears and differentialMk. III19621500cc570 lbs"Hewland quick change gears", VW differential, tail shifterMk. IV 19631500cc570 lbsGKN (Ford Zephyr) diff., forward facing selector on the right side, Metalastic doughnutMk. V 19631600cc575 lbs"High torque", thicker gears and layshaft for Cosworth Mk. XII and XIIIMk. VI19651500cc575 lbsImproved Mk. IV for F3 and later FF. Metalastic doughnut attachmentMk. VII19681000cc672 lbs6 speed version of Mk. VI for 1 Litre F2Mk.819681500cc570 lbsHewland diff. on taper roller bearings, all gear hubs splined to pinion shaftMk.919731500cc570 lbsDouble row output shaft bearing for Spicer halfshafts, side plates for inboard disc brakeLD2001988150 lb/ft563 lbsComplete redesign of Mk.9 housed in Hewland case
Transmission capacity is measured by the maximum output torque (not the horsepower), which is the product of the input torque times overall reduction ratio. However, as the output torque is proportional to the input torque with typical gear and differential reduction ratios, and as the input torque (engine output torque) is roughly proportional to the engine displacement, Hewland used to indicate the maximum allowable engine size, and later the maximum input torque measured in Lbs/ft., as the transaxle selection guide. The following is the list of larger product range up to 1981. Type Year Rating sp. Weight DescriptionHD1963300 lb/ft485 lbs"Hewland Design", bespoke casing, alternative to ERSA KnightHD51963200 lb/ft585 lbs5 speed version of HDLG1966600 lb/ft2136 lbs"Large Gearbox" for Indy, internal oil pumpFT2001966200 lb/ft590 lbsAll new HD5, big sellerLG5001967500 lb/ft4136 lbs4 speed LG, LSD or 'Power Loc' for CanAmFG4001968280 lb/ft5110 lbsFT gears with LG diff. for DFVLG6001968600 lb/ft5145 lbs5 speed LG500, longer bearing carrier, for F5000 and CanAmDG3001969300 lb/ft5117 lbs"Different Gearbox", LG diff., internal oil pump, for F1 and sports carsLG21971700 lb/ft2138 lbsSecond generation of LG, for IndyLG Mk. II1971600 lb/ft4/5140 lbsSecond generation of LG600, new case, selector rod and diff. DG300 Mk. II1972300 lb/ft5118 lbsSecond generation of DG300FGA1972280 lb/ft5/6110 lbsSecond generation of FG400, for DFVFGB1978260 lb/ft6112 lbsLower ratio FGA, larger case for bigger diameter gears, for high rev. turbo F1DGB1981440 lb/ft5134 lbsHigher torque version of DG300 Mk. II, stronger case, for sports car enduranceVG1981600 lb/ft5167 lbsHigher torque version of DGB

After an approach from Richard Noble, Hewland was persuaded to design and build the AE75, a 75 bhp aero engine for Noble ARV Super2, a 2 seater light aircraft. This engine, an inverted three cylinder water cooled two stroke unit with dual ignition and a 2.7:1 reduction gearbox, was developed from Hewland's existing two cylinder microlight engine. The AE75 was very light at , thereby contributing to the overall lightness of the aircraft, so that the ARV Super2 weighed 40% less than its competitor, the Cessna 152.

Hewland has been involved with various track day cars. Most notably the Caparo T1 and BAC Mono, both of which featured gearboxes designed and manufactured by the company.

Hewland have been involved in the Formula E racing series since its inauguration, supplying the full grid of competitors with transmissions. Currently Hewland are still a key supplier into this series.

Hewland provided a custom high torque transmission for the World record breaking Buckeye Bullet 3 which currently holds the electric land speed record at .

In an interview in Car&Driver magazine in July 1974, M Hewland discussed his work and that of his head engineer John Logan on a 500 cc, single cylinder, sleeve valve engine, coming from his experience inside a 'Mobile Labor Force' at Bristol during WW II, research aimed at Formula 1. Hewland claimed having got 70 73 HP, 47.5 Lb. ft, with a fuel economy of .45 lb/HP/Hr in the racing version, and .39 in an economy engine.