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QBE81G002

Quaife/RPE 7-Speed Sequential Ultra-Compact Transaxle Gearbox - Helical

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Developed jointly with Radical’s Engine department (RPE), QBE81G is a compact, 7-speed transaxle gearbox for mid and rear engined sportscars. Rated to 450bhp, QBE81G is designed around an ultra-short footprint, locating the mass as far forward as possible between the engine and differential to reduce the vehicle’s rear polar moment of inertia.

Technical highlights include 85mm shaft centres, an integral oil pump and Quaife ATB limited slip differential (optional plate type LSD available). Designed to run on Quaife’s preferred Geartronics semi-automatic pneumatic paddleshift system (not included) the required air cylinder is bolted to QBE81G’s maincase.

QBE81G is offered with a choice of straight-cut (spur) or helical gear ratios and a range of bellhousings – example fitments include the RPE V8 and the four-cylinder Ford Ecoboost engine. QBE81G can potentially be reengineered as a five or six-speed unit with a higher torque capability should interest arise.

Key technical features of the QBE81G seven-speed compact transaxle gearbox include:-

• Paddleshift gearshift with a choice of straight cut or helical close-ratio gears

• Ultra-compact, lightweight design to centralise mass

• A choice of Quaife ATB or plate-style limited slip differential available

• Rated to 450bhp with 85mm shaft centre design

• Also available as 5 or 6-speed for higher power applications

Gear Ratios (Helical)

  1st      2nd      3rd      4th     5th     6th     7th

2.867  2.053  1.609  1.308  1.069  0.875  0.765

Gear Ratios Straight cut (Spur)

  1st       2nd     3rd      4th     5th     6th     7th

2.438  1.889  1.500  1.238  1.043  0.897  0.774

2.438  1.889  1.500  1.286  1.115  0.958  0.833

Final Drive Ratios

3.056  3.130  4.067

Quaife/RPE 7-Speed Sequential Ultra-Compact Transaxle Gearbox - Helical
Quaife/RPE 7-Speed Sequential Ultra-Compact Transaxle Gearbox - Helical Quaife/RPE 7-Speed Sequential Ultra-Compact Transaxle Gearbox - Helical

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