We noted an air leak that seemed excessive. After discussion with Spartan, we took it to NIRVC in Lewisville, TX. They discovered a leak in one of the lines leading to a distribution center at the rear axle. It was repaired same day and no further air leaks were noted.
Although NIRVC charged us $447 for parts and labor Spartan will reimburse us as the chassis is still under its 3 year warranty.