Xtrac, manufacturer of race transmissions, has recently unveiled its latest competition gearbox, the P1202. The new unit has been designed for all-wheel-drive cars competing in the World Rally Championship support category WRC-2, under the newly introduced FIA R5 price capped regulations.
Xtrac states that the P1202 utilises ‘championship winning experience in S2000 and WRC applications to deliver a technically reliable and lightweight transmission solution built to its normal industry-leading quality standard’.
The P1202’s casing is made of L169 sand cast aluminum for increased strength, whilst the rear disconnect unit utilizes Xtrac’s patented passive hydraulic system. The use of aluminum in both units, means that the gearbox weighs just 55kg, whilst the rear differential tips the scales at 35kg.
Its specification also includes a 50:50 fixed front/ rear torque split, with the ability to handle up to 500Nm (368 lb/ft) of torque. The transmission and rear differential both feature integrated oil systems using eccentric rotor pumps, with the provision to add oil temperature and pressure sensors.
“We’ve optimised the P1202 transmission to meet the FIA’s weight, durability and cost targets,” said Adrian Moore, technical director at Xtrac. “It incorporates Xtrac’s well proven plate differentials, and the gear-change mechanism is the latest overlapping type on all five gears giving a class leading, fast, accurate and very precise manual gearshift. For almost 30 years we have supplied transmissions for the main world rally championships and have used that experience to develop this transmission.”