Bad vibration felt through body when fast acceleration, what is it????

[RandyJr]

Here's the strange problem, sometimes when I accelerate really fast from a stop in my 1992 AWD, as the RPM's get up, I can feel a bad vibration right under me in my seat and not from the front of the car. If I let off the gas, it will stop vibrating and then I can speed up with no problems. I'm thinking driveshaft but when I got under there today, everything seemed okay. I couldn't see any broken driveshaft mounts or anything. What should I look for? Could it be the front CV axles making the car shake? It has also happened in 2nd gear when I downshifted at 40mph. It almost seems like it will vibrate whenever the AWD is going to keep me from spinning. Any ideas at all?

 

[1stGENracer]

Your exhaust can be hitting the underneath of your car. Check for bad exhaust hangers, they can also get twisted up after hard hits and hold the exhaust in a bad spot until the throttle is let off allowing it to move back to its original spot.

 

[aaron93tsi]

I had that same problem and a buddy of mine told me it was my carrier bearing. He used window weld to fix it.

 

[1stGENracer]

I forgot about the carrier bearing, that could also be a problem.

I used this VFAQ to fix mine.
http://www.plymouthlaser.com/shaft.htm

 

[leet]

Does your shifter knob happen to move at all when you step/let off the gas?