Heck, I'll take a shot in the dark.
I would check your engine mounts on the bottom. I had a car once that had a bent "U" frame that supported the right lower engine mount. This let the engine sag and messed with the alignment of the drive shafts to the wheels. It only vibrated real bad when you accelerated. I guess the torque through it off just enuff to create a wobble effect.
Another option is a transmission problem. You might want to have a trans place check it out, and see if maybe that is what is causing the vibration under a certain load.
Friday, July 14th, 2006 AT 5:17 PM