Ism Cummins engine 350 hp with Jake Brake 9LL transmission Fuller Eaton 20k Front axle 46k drives on Chalmers suspension 13.2 tag axle McNielus 11yd Bridgemaster 5 mixer the drum is thinner, but still has quite a bit of life left especially with low to moderate use it was used until the company was sold out everything works exactly as it should bonus. The air conditioner even blows cold! This truck has definitely been used But it is not wore out. It still has a lot of life left, ready to go anywhere it runs and drives great!