Issue 2.0 – 10/12/15 - 1152 Longitudinal Transaxle Sportscar Gearbox Manual
© 2015 - Xtrac Limited, Gables Way, Kennet Park, Thatcham, Berkshire. RG19 4ZA.
Xtrac Inc, 6183 W. 80th Street, Indianapolis, IN 46278. United States
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3. Specification
The 1152 gearbox has been designed for use in Sportscar endurance and sprint
races, using many existing tried and tested parts packaged to suit the specific needs
of high duty Sportscar formulae. The unit is a longitudinal transaxle design for use in
rear wheel drive vehicles and comprises six forward gears plus reverse.
Xtrac Part Description: Longitudinal Transaxle Gearbox
Assembly
Xtrac Part Number:
(LMP3)
1152-900-000* (Generic)
3.1. General Items
Drive is transmitted from the engine, through the clutch shaft directly to the
longitudinally mounted layshaft. The layshaft drives the mainshaft through the
change gear ratios. The mainshaft gears are mounted on hubs on the mainshaft and
transmit drive to the shaft itself through sliding dog rings. The mainshaft transmits
drive into the bevel pinion which drives the transversely mounted bevel wheel. The
bevel wheel in turn drives a Salisbury type plate differential. CV-type output flanges
drive customer-specified CV joints and driveshafts.
The change gears are non-synchromesh using 6 flat top dogs, engaged using a full
length barrel. The cluster can be removed as a single unit.
The sequential gearchange operates in the following sequence R, N, 1, 2, 3, 4, 5, 6.
For use in LMP3, the gearbox is rated at ~ 540Nm (400 lbf.ft) input torque *(see note
below).
For use outside LMP3 and fitted with the option uprated cluster and bevel set, the
gearbox is rated at ~620Nm (457 lbf.ft) input torque *(see note below).
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