I have a 2005 V6 sport...rented a trailer from U haul ,6x12 with surge brakes. Drove it 80 mi,empty and the ride was terrible. The truck kept pulsating..like pushing and pulling for the entire ride. Couldn't figure it out, thought maybe the brake wasn't working properly and was causing the problem. Was making me sick from the jerking. The ride back full (light load) was a little better but not much. They were clueless at U haul. Anybody got any experience with these trailers. I diffenately would not rent a surge brake trailer again.