PAGE 7 © Copyright Hewland Engineering Limited 2001-2009
TECHNICAL SPECIFICATION
The FTR gearbox family are transaxle units, designed for mid-engined, rear wheel drive cars. The units are produced with six or five
forward gears, reverse, and a differential.
The gear selection mechanisms are sequential, with separate mechanically actuated reverse / neutral baulking mechanisms. The
gear selection order is Rev - Neutral - 1st 2nd 3rd 4th 5th & 6th (If applicable).
The drive is taken from the engine via the clutch shaft, which turns input and pinion gears to drive the final transmission assembly.
Gear changing is effected through non-synchronising face dogs. An extensive range of gear ratios provides a wide range of gearing
permutations. The gear ratios and differential assembly can easily be changed without removing the gearbox from the vehicle.
Heat treated nickel chrome steel is used to manufacture all gears and shafts. The selector forks are also steel. The gearboxes are
splash lubricated.
In general configuration, the FTR family of gearboxes are high tech racing transaxle units which achieve the maximum effective use
of power, in conjunction with extremely stiff integral rear suspension mountings.
Weight (Aluminium) FTR(6sp) 88 lbs (40 Kg) Gear ratios from 3.167:1 to .89:1
JFR(6sp) 79 lbs (36 Kg) Final drive ratio 12/34, 9/35 or 9/31
Oil type SAE 80 or 90 Clutch shaft made to customers requirements
Oil quantity FTR/JFR(6sp) 4.4 pints (2.5 litres) Pinion shaft nut torque (6sp) = 75 lbs.ft (100 Nm)
Maximum engine torque 220 lbs.ft (298 Nm) Pinion shaft nut torque (5sp) = 115 lbs.ft (155Nm)
Crownwheel bolt tightening torque = 75 lbs.ft (100 Nm)
Engine oil tank capacity (FTR ONLY) 13 pints (7.5 litres)
Pinion bearing nut torque = 150 lbs.ft (205 Nm) (FTR FORMULA BMW ONLY) = 130 lbs.ft (176 Nm)
(See Page 89 for general K-nut tightening torques)
GEAR SELECTION
Up shifting is effected by moving the gear lever in a backward direction. For Downshifting the opposite is necessary. Shifting down
into either neutral or reverse is prevented by a baulk plunger. So the plunger operating cable must be pulled before such a shift can
be made. Up shifting is as for any other gear, as it does not require the plunger cable to be pulled.
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