As I just wrote about in another recent thread, Ive had my Sterling(non all terrain) tow bar for about 8-9 years now and even when I made the purchase, I recall them advertising it as non binding(after all, it was the costliess of their tow bars at the time). Make a long story short, Ive always had one side of the bar that binds constantly(that being the right side looking at the rear of the motorhome). I had the tow bar checked and rebuilt at a Rally one time but the Rep/Tech said there was nothing wrong with the bar. Ive tried all the different approaches from turning the steering wheel, starting the car and moving forward a bit.......anything to get the bar to releaase with only limited success. Ive given up so I always have a smaller diameter pin handy with a hammer just so I can knock the hitch pin out of the bar and IM OK with that.
When I replace this tow bar, Ill be sure to get an all terrain model, which I understand pretty much elimates this issue.