This is the second thread about troubles with disc brakes on a Vanleigh trailer--the last one was with a Chevy I think. Anyway, the moral from that thread was that the factory wasn't much help blaming problems on the truck. I would try to get with someone from Hydrastar or a service shop with Hydrastar experience. Although Hydrastar claims to be fast I couldn't get factory support to confirm a low startup voltage. So, I went with Titan because the startup voltage seemed to be the lowest of the 3 main manufacturers.