ok, so i was driving down the motorway and my car made a funny whiring noise so i slowed down a bit, came off teh motorway drove behind a wagon at 40 mph for about a quater of a mile, come off the dual carige way and went to build my speed back up , not ragging it but quickly, then it whired and promptly the front wheels locked up and i stopped, there was smoke pissing outta the gearbox area. My friend thought the diff may have gone. Just wondering if anyone has any ideas about what it may be