2. Every GM lift kit we have ever seen requires you to cut this differential-mounting ear off of the lower crossmember. The Explorer Pro-Comp kit is no different. The instructions call for you to make this cut with the front differential removed from the truck, but Corder finds he can make a more accurate cut by leaving it in place. Again this saves steps and time, and because three other bolts hold in the front differential, there is no need to take it out of the truck.