I have a 95 explorer xlt 4.0 4x4. My o/d light started flashing and now it shifts hard when slowing down especially from 2nd to 1st. I know my o/d works because rpm's change when I push o/d button at highway speed. I was told it may be a vss but there are two on my explorer and want to fix the right one. Will driving it like this cause further damage? Please help!