Double frame cab and chassis with Allison automatic transmission, 18K front axle, 40K rears on Hendrickson spring suspension, 315/80R22.5 front tires, 11R22.5 rear tires, 214" wheelbase, 148" C-T, 16'6" of frame behind the cab, and 6.43 ratio. *** Currently set up as a vac truck but the vacuum system can be removed***