^^^^^^Grenade is right. I actually thought it was a gun shot when mine exploded. I replaced it with a tru trac, mistake. The tru trac needs both wheels to have some traction with the earth to work. So if you're off road and you have one wheel off of the ground that wheel will spin while the other does nothing. Well guess what? Often times in snowy condition, usually unless on a highway, there is so little traction available that the unit will not engage, just like if one wheel were in the air. In the dry it will light both tires up no problem. When it gets real slippery it checks out and may as well not even be there when you need it the most.
Does anybody have the Richmond powertrax? That seems like a reasonably priced alternative as well. Although a little pricey when it's for a Dana 60.
https://www.summitracing.com/parts/p...0-lr/overview/