Machine description: Cummins ISC260 8.3 L Diesel 260 hp Engine, 2005 US EPA Label, Allison 3000 6-Speed Automatic Transmission, 12000 lb Front Axle, 22700 lb Rears, Dana S23-190 Drive Axles, 5.57:1 Axle Ratio, 34700 lb GV... more info about the 2006 Kenworth T300.