Released in 2017, the Kenworth T610 is the result of almost 2 years of research and development by Kenworth Australia. The truck borrows design features from Kenworth Australia and both Kenworth and Peterbilt USA to create a distinct truck for the Australian market. Engine - Cummins X15 485HP. Optional up to Cummins X15 600HP. Transmission - Eaton Fuller 18 Speed Manual or Automated. Chassis - 6x4 Short and Long Cab - Day Cab, Sleeper and Aero Sleeper.