Performance The performance in these trucks comes from a reliable 4.3-liter, overhead valve (OHV) V-6 engine designed for gasoline, LPG and dual fuel systems; or a 4.6-liter (OHV) 6-cylinder diesel engine Engine and transmission are mounted in a full-floating design to reduce maintenance and engine noise Optional travel speed controller can control maximum travel speed without affecting hydraulic lift speeds to increase safety without sacrificing productivity