I drove up to tacoma and then drove home I stopped off the road and let my kid pee then took off got up to speed and then the car suddenly started to wobble badly I dont feel it in the steering wheel it feels to be the back of the car.

 

I feel it at all speeds but doesnt get real bad until 55 it feels like a flat spot like a bad tire or flat. the tranny shakes violently could this be a front axle or the drive line on the subie please help thanks

what are the replacement ujoints for the rear I can get them out i think.

 

found rust on the rear u joint might be the problem

It was my u joint behind the tranny and in front of the diff found the u joints at auto zone yeah 4 wd again

looks like you already found it, but same thing happened to me up in Olympia, had Mark (xsnrg) swap out a new "used" driveshaft from his shop stash in his driveway. Got lucky it started shaking at mile 99 and he lived at mile 101.