Well one or the other is completly screwed! Let me start by saying a few months ago my speedometer and odometer both stopped working. Replaced vss2 with one I got from Nate. Still didn't work so I assumed the gears in the front differential( fwd by the way) were bad. Drove to work last night and felt a skip on interstate once or twice but wasnt to alarmed by it. Get to work and put it in R to pull into parking spot and heard a slight grinding. Parked it and went into work as I had no time to investigate.This morning car starts fine, let it warm 2-3 mins as usual. Put it in D and pull off and it made the worst grinding sound ive ever heard. Will not budge. Turned car off and on again, starts fine but as soon as I go to put in gear I get that horrible grinding sound . What do you guys think, tranny or differential?