i was drivin my classic wrx as usual and as i went up through the gears after selectin 3rd there was a crunch and a rumble then a whine now i seem to have lost 3 rd gear ahich appears to have dissappeared the car dives fine and theres a slight whine comin from the box ,is there anybody out there that can shed some light on this matter.ive heard there could be a prob with the synchromesh but no too sure any body ken