I would like to know how to slow down this teeter totter action I get while going down the road. It gets bad at times were the t.v. speakers will come loose from the cabinets. Any suggestions ? I have a dodge 2011 3500 hd 4 wheel drive . The 5er is a alpine made by keystone its 39 ft . 2012 I travel with no water, the weight is 13, 500 lbs loaded, not maxed out. The hitch is located over the rear axle. When pulling the trailer the truck doesnt bounce up or down. I notice the pin box doesent move. It the body of the trailer. You can see were the body rubs on the pinbox as it teeters up and down, when it gets bad.