page_title: M425 and 426 Tractor Truck
section_title: Engine and driveline
hierarchical_section_title: M425 and 426 Tractor Truck / Engine and driveline
caption_attribution_description: English: IHC Red 450 engine cutaway view
context_page_description: The M425 and M426 Tractor trucks were 5 ton load rated 4x2 semi-tractors that were used from 1944 on by the US Army. They are famous for the use on the Red Ball Express from Normandy to the front, but were also used in the China Burma India Theater. After the war they were used in Europe, including during the Berlin Crisis, and in the Korean War.
context_section_description: The engine in these vehicles was an International Red Diamond 450D, a 451 cu in (7.4 L) overhead valve inline 6 cylinder gasoline engine developing 125 hp (93 kW) at 2700 rpm.
  The clutch was made by W.C. Lips, Model Z-32-S, and the transmission was an IHC Model F-54-D. This transmission had 5 forward and one reverse speed. The first speed was very low, fifth speed was direct.
caption: IHC Red Diamond 450D engine (cutaway view)
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