Ok, I purchased this thing with the idea in mind of making a snow plow out of it and occassional road driving, etc. When I purchased it the rearend was out. I recently replaced it and it works fine. However, the 4 wheel drive I do NOT understand nor does it seem to work correctly. If the vehicle is sitting on ice and the back wheel/s spin and you put it in 4X4 it should cause the front hubs to lock in and away you go. Im used to the older type 4X4's and away you go! This thing will not move, the front drive-line just spins and the hubs do not lock in, so I rock it back and forth and "occassionally" you can feel the front hubs wanting to lock in or jerking, then after several mins of fooling around, it will sometimes lock in and away I go, like one should after putting it in 4X4. MY QUESTION; Is there something wrong or is this normal? Are the front hubs electronically controlled or is something worn out in them that causes them not to lock in and work correctly? I do NOT like things the way they are now and it is worthless as a 4X4, imo. Idea's and options please?