I have a '96 Legacy Outback wagon with 153k. It's got an automatic and AWD. The rear wheels are not driving at all and in fact the driveshaft isn't even turning. There's no fuse in the "FWD only" slot and there's nothing that could be bridging the terminals and completing the circuit. There's no error message on the dash and a scan of the OBD doesn't yield any information.
Any ideas? We need those two extra wheels for our Jersey winters!