Air ride front axle. Rides really smooth. I don"t know the history of the truck more than I put a new starter and 4 new batteries on it. I drove it a couple of miles and it seems to be running fine. A/C don"t work. The APU won"t start, it cranks over really slow, starter probably bad. Look closely at the pictures and email questions. You are welcome to inspect the truck in person before you bid.The truck is sold As Is, Where Is with absolutely NO WARRANTY! PLEASE DONT BID IF YOU DONT INTEND TO FOLLOW THROUGH. HAPPY BIDDING!