Some what of the same problem we had on a Keystone toy-hauler in Sacramento ca on I5 a couple yrs ago.. Really bad road there... The pin box broke lose enough to drop the 5th wheel body down on truck bed much, damage to truck.. The front cross member was completely sheared into on one side ripped lose on other side..Pin box twisted enough that I had to replace it. and yes we had the back loaded with a RZR. This was a fine Lippert frame...we also had a Cougar at the time and got rid of both Keystone products.. Never again.