Hello all, i have a problem with my 4wd, i bought my 1999 V reg Sportage 3 days ago, I was driving along around 40 mph when out of nowhere the front right wheel started making a load buzzing noise (gears clicking rapidly) like its trying to engage 4wd, i pulled over and put it into 4wd and the noise stooped, put it back int 2wd and the same noise again, I had to drive home in 4wd (30mph to be safe), just as i got home (10 mile journey) the front right wheel locked on and off a couple of times, i then put it back into 2wd and all seems to be ok for now. with the front wheel jamming on like that could the diff be shot, I'm too weary to put it back into 4wd now, what do you think, Many thanks for your feedback. Simon.