Overheating dilemma....need input.

If your temps dropped down immediately when the pusher kicked on, it is probably not a problem with your radiator. Which means it's either air flow or coolant flow. Since nothing has changed about your air flow, that leaves coolant flow. I'd be willing to bet that your water pump is about to give up the ghost

Yeah, the fact that I smelled burning rubber then lost a belt seems to be the giant staring me in the face but the fact that the water pump pulley spins freely with no noise kinda had me stumped.

Looks like I need to pull the water pump for a look see and it all kinda makes sense since it never did cool even after I put a new belt on.

Thanks for the input guys....nice to get a few more opinions.