At Jaytrac, we offer the complete package. In addition to the vast range of replacement engine and machine parts , we stock and distribute a complete range of high-quality replacement transmission and powertrain parts for Caterpillar and Komatsu.

The earliest earthmoving machines were based on agricultural tractors and utilised direct drive manual gearboxes. Following developments in the USA automotive industry in the 1940/50’s construction equipment manufacturers used power trains based around torque Convertors, planetary gear groups and power shift transmissions.

One of the first Caterpillar tractors to go into production with power shift transmissions was the legendary D8H tractor in 1959. Marketed as ‘split second shifts’ the transmission reduced cycle time between forward & reverse. Production and operator efficiency were significantly improved due to the ease of use and comfort of the design.

High performing friction discs and clutch plates are essential to the longevity and performance of powertrain components. Jaytrac supply discs and plates components from OE quality manufacturers.

Our stock includes but is not limited to;

  • Gears
  • Carriers
  • Friction discs and plates
  • Bearings
  • Torque converters
  • Joints and spiders
  • Driveshafts
  • Crown wheel and pinion
  • Final Drives


Our replacement transmission parts are of the highest quality, and we stock a wide range of products to suit multiple Caterpillar and Komatsu machinery applications

With over 20 years’ experience, we are well-equipped to ensure our customers receive the right product at the right price; it’s this knowledge which sets us apart from our competition and we look forward to helping you service and repair your machines.

For more information about the transmission products we supply, or to enquire about our other products and services, get in touch with our customer service team. Online or over the phone, we are here on hand to answer your questions. Contact us today on 01604 491 133 or email us at