hi. today i was driveing my 02 terrano 2.7 down the road when i got a huge wob shacking from stearing wheel. it felt like the wheels were going to come off,stoped the truck had a look at wheel nuts. all ok.got back in and drove home / all fine? takeing it in for garage to look at in the morning. wot do you guys think it could be? m any thanks/. ps hope it just something lose