Reading my post again made me realize that my grammar's wrong. LOL
Anways my 93 coupe did that when I got my car last year it had 101K miles then. I first replaced the worn out axle but that didn't fix it. Then after being on panic for couple of days I took it to a different machanic and he told me it's the tranny mount. So replaced it and the car felt like new, well almost. Parts and labor cost me $250 from my trusted mechanic. Good luck!