Skip to content


Xtrac’s ‘P1113’ 4WD transmission has been designed specifically to cater for Rally cars operating within national rally championships, with a specification broadly in line with the FIA R5 regulations.

The ‘P1113’ transmission utilises Xtrac’s 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.


  • 6 speed manual sequential gear change.
  • 500Nm (368lbf ft) maximum engine input torque.
  • Cast aluminium L169 casings.
  • Mechanical type plate front and rear differentials with externally adjustable positive preload.
  • 50:50 fixed front/rear torque split.
  • Gearbox rear drive output shaft positioned for optimum vehicle and transmission package.
  • Rear differential including Xtrac’s patented rear drive disconnect system.
  • Integrated oil system using an eccentric rotor pump.
  • Provision for oil temperature, oil pressure and final drive speed sensor mountings.
  • Provision for individual wheel speed sensor mountings.
  • Gearbox weight approximately 55kg.
  • Rear differential weight approximately 35kg.

Transmission Benefits

  • Light, positive sequential gear change.
  • Optimised cluster to provide near instantaneous gear change.
  • Easily removable cluster assembly for ratio changes.
  • Easily accessible oil filter cartridges.
  • Simple and efficient adjustment of differential preload.
  • Designed for optimised drive shaft angularity.
  • Cost effective, reliable, lightweight solution.

Options Summary

  • Various driveline options.
  • Prop shaft flanges to suit specific requirements.
  • Various output flange options to suit drive shaft joints including AAR and plug in types. Integral speed sensor trigger as required.
  • Various options for reverse gear interlock cable assemblies.
  • Gear change position potentiometer.
  • AP Racing clutch release.

Find out more

Please fill in your details below and one of our team will contact you.

    This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.