Xtracer 1152 - Gearbox Operation; Gearchange Description; Oil System

To Next Page

To Previous Page

Issue 2.0 – 10/12/15 - 1152 Longitudinal Transaxle Sportscar Gearbox Manual

Xtrac Inc, 6183 W. 80th Street, Indianapolis, IN 46278. United States

4. Gearbox Operation

4.1. Gearchange Description

Sequential gearchange operated by Xtrac’s well proven and latest technology

‘overlapping’ polynomial barrel. The gears are engaged sequentially R, N, 1, 2, 3, 4,

5, 6. No mechanical neutral/reverse lock out is available, as the lock out will be

enabled by the AGS gear change strategy. The gearbox is also specifically designed

to use Xtrac/Megaline’s P1254 Integrated Valve Actuator (IVA), see below.

4.2. Oil System

4.2.1. Description

An internal single stage eccentric lobe style pump, fitted at the rear of the gearbox

and driven by the layshaft, operates as part of a simple re-circulating system. The oil

is picked up through the oil filter within the baffled scavenge area in the rear portion

of the cluster housing. The scavenge area is positioned to provide pickup

independent of car accelerations and reduce the effects of windage. The oil should

be fed to a remote cooler from the oil-out port (-8) and returned using external hose

(not Xtrac supplied) to the gearbox oil-in port (-8). The use of an oil cooler is

recommended when the gearbox is expected to run for extended periods of time or

in ambient temperatures generally greater than 25.0ºC (77ºF). However, the use of a

cooler is also largely dependent on the in-car installation and the extent to which cool

air is allowed to circulate around the outer surfaces of the gearbox casing. The

cooled oil is distributed internally through the dedicated oil feeds within the gearbox.