I'm at a total loss right now and I don't know what to do. I'm having this strange vibration when the car is either decellerating or accellerating. When I drive at a constant speed it more or less goes away. The vibration has been getting progressively worse the past two weeks. Now when I'm on the gas on the highway the vibration gets so bad it feels like the wheels are going to fall off.

The strange thing about it is the longer I keep a heavy load on it the stronger the vibration gets. It's almost like something is overheating and the more it overheats the more it heats it and the worse it gets. Then if it cools the vibration gets better!?! The rate of vibration is definitely not linked to RPM, so I've ruled out anything before the tranny.

I've replaced both driveshafts, the intermediate shaft, raised the ride height back near stock, pulled my camber back to stock, but nothing has had an effect. Both wheel bearings have been recently replaced too. So I guess it either has to be in the tranny or somewhere in the knuckles. Has anybody experienced anything similar to this? I don't want to start replacing things like the tranny only to find that it doesn't fix it. Any help would be greatly appreciated!