I've found a used 1998 Explorer for my grandson at a great price. There is one issue I'm concerned about. Everything is great except the reverse gear in the transmission. When put in reverse, the vehicle will move for about 4 seconds, then the vehicle stalls. The current owner puts in reverse, just gets it moving then shifts to neutral for it to continue rolling back. He states it just needs a neutral switch but I'm not knowledgeable on this. Anyone confirm this or heard of this before?