hey everyone. this problem is a little out of my league and i was wondering if anybody could help me diagnose this problem. i have a 1990 legacy wagon with an automatic transmission. this morning i noticed when i dropped my car into 3 out of D to help slow it down, the car began to shake as if i were driving over speed bumps. i tried it again at a lower speed, and it didn't happen. it seems to only happen when i am doing about 50 mph or faster, and only when i put it in 3. 2 and 1 don't do it. does this problem sound familiar to anyone?
thanks in advance!
bnb