Check the pin that holds tongue to trailer. I had one break on mine today and almost caused a wreck. Hit a dip going onto a bridge weight shifted to the rear and all heck broke loose. Just about 100 pounds of bag mulch slid back on the wet wood floor. No place to pull over, trapped between two bridges and some guard rails. Had to drive 1/8 mile to a driveway to get off the road. Dragging the trailer behind me. Bent the trailer part bad enough the tongue twisted to one side a bit but stayed on the hitch ball because I had a hitch lock holding the latch down. Old trailer with many miles on it but still in good shape other then that pin that wore into over the years.