Originally Posted by footloose
Do you mean the hitch on the truck or the coupler on the trailer. If it's the trailer end, I would suspect the welding at the trailer factory caused the problem.
I think she is refering to the under bumper hitch, bolted on the frame. Although I don't know why some one would put it on and off the vehicle.
But I have seen some under bumper hitches that had rust holes in them.