When I back up in my 93 Camaro Z28 6 speed the tranny chatters really bad and it does it at the very top of the clutch when I take off to go foward. Also I have a Duel Centerforce Clutch.

 

is this a new clutch? I've heard of new ones chattering when they are being broken in, so this could be the problem, unless its an old clutch and its engaging at the top, wore out and over heated which would could cause some chattering. I'm not an expert on clutches so hopefully someone else will chime on in here

 

I have 26,736 miles on the clutch. I only drive it on the weekends.