so about three weeks ago when it first snowed i went to put it in 4wd and i got up to 20mph and the x was shaking like the front end was going to fall off. pulled over took it out of 4wd and then drove to see if it would stop, it didn't stop,i thought the front end was really going to fall off. got out as i was really pissed. looked at everything and it seemed fine got back in and turn the wheels all the way to the left and than to the right and than drove and the x was fine got home and went to bed, the x drives fine until i try 4wd, than it shakes like a mad man, but when i turn to the left well driving in 4h it goes away and when i turn to the right well driving in 4h it gets worse and i tried the turning the wheels all the way to left and than to the right and it doesn't do what it does in 2h, and once im out of 4h i have to turn the wheels to the left and than the right and the shakes go away, i think its a bad cv axle or u joints i haven't had time to take my skid row plates off to look at the ujoints but i have played around with the cvs and there is some play but not much, or could it be something with steering or the alignment please help and sorry for the long post but just wanted as much information