This is a 1990 Peterbilt Model 379 dump truck with a 1979 Reliance Transfer Trailer. They are set up to function together. The Peterbilt is powered by a 3406 Caterpillar diesel w/ Jake Brakes. Horse power is The transmission is a 10 speed. Miles on the truck 845304. The truck and trailer are both equipped with 11-24.5 tires on aluminum wheels. The dump tubs on both units are in good condition. Suspension on the Peterbilt is air ride. These are Arizona units and do not have rust issues. The dump truck is available without the transfer trailer. These units are located in Phoenix, Arizona. Sales tax may apply.