I have a 6 puck clutch with 3500 lb pressure plate.

4.44 gears in the rear and dirveshaft has been recently rebuilt with new U-joints and balanced.

When I shift hard, (let off the clutch fast) I hear the rear end hit the under carriage. (Only happens when i shift hard, runs perfectly when I shift normally)

I know it hits the under carriage because I looked under it and looking from the rear of the car forward, there are marks right after the U-joint. So it's actually the driveshaft hitting the under carriage.

I've checked both upper and lower control arms, wattslink/bracket. Checked for cracked or broken bushings in between control arms... NOTHING

Anyone else experience this or know what could be causing this?

I'm sure I'm up to about ~ 160HP flywheel...

-Ryan

 

NM, figured it out my DAMN self...



My car's tooo low...