The skidders use the same 6V53 Detroit Diesel engine and steering gearbox as the M113, but utilized a more heavily built undercarriage and a 4-speed Clark powershift transmission. The skidder either came as a cable arch model, with a tilting tray to set the logs on (A hydraulic grapple attachment was later offered to fit over the cable fairleads), or as a Clam-Bunk forwarder, with a Prentice grapple mounted on the roof of the cab. Dealers also modified the base tractor to handle various forestry and utility jobs.