I would say there is no comparison between a TruTrac and a TracLoc. TTs are gear driven, never wear out, don't need special lube additives, and has a more agressive lock up ratio. It isn't a locker, but better than a TL. Tractech recently upped the tire size limits to 38" cause they saw no failures with 35". I drive in snow at times, and in the future will swap in a D44 up front. Paid $250 used for mine. Yes it helps on the trail. It is perfect for me.