I was hauling a load of firewood with my AC-500 and trailer. I needed to come out of a steep gully to get back up to the trail. I decided to use the winch and low range to come out safely. So I hooked up to a nice tree and started up nice and smooth. I was 3/4 of the way up when the winch released and I had to back down. You can pull cable by hand even in lock and it will not wind up Even with no load. It will go in reverse though. The winch is a Warn 2.5 model. Any one else have a problem with this model? It was only the second time I used it. I may have been close to the limits, but it did not stall it just stopped pulling. I will call Warn next week to see if it can be repaired.