I have a tru trac. Its more of a self engaging locker. It works but its a handfull. It goes were the wheels are poi.tedor direction of slope. Scary in snow.
I tow alot with my truck. I put about 2000 miles on it a year and the only time its driven is for work. I pulled a international truck that weighed 18000 lbs out of the mud on a hill. It was buried to the axles. A 1965 cadillac a 10000 lb tanker trailer. Boats firewood trees scrap stumps quads...