For 6 years we used a Blue OX 10,000 tow bar. It worked very well. I had it checked out twice @ Q and once I had a problem with the shank bolt being loose. I also began to have problems with the 5/8 p...
Check the side to side/up and down movement of your hitch. You may think everything is ok, but your tow may be weaving side to side while you are towing. I have a rear view camera and I saw the Subie I tow moving around excessively and made some shims to go in the hitch to tighten up the movement. I also clean and lube the hitch pin every long trip. HTH