DBL_TKE

So I have a '91 Z28 with an LB9 and T5. The previous owner put a new clutch in approximately 400 miles before i got it (7k now) however it has a lot of clutch chatter. It's about as violent as wheel hop shaking the whole car. It only happens when I'm slipping the clutch between around 800-1500 RPM's. What could cause this? A non resurfaced flywheel? Loose flywheel/pressure plate bolts?

I also have an issue where the transmission will grind when shifting only into 4th gear, and only at high RPM's (4k+ RPM). Otherwise it shifts perfectly into every gear under normal driving. Does anyone have any ideas what can cause this issue though? I figure this may have something to do with 4th gear being the 1:1 gear.

1995 Z28

Did you ever find out what was wrong?

SPEC-01

iTrader: (2)

Does this happen when you are slipping the clutch to leave from a stopped position? Or are you seeing this when in motion?

1995 Z28

I'm having this issue when leaving from a stop.

DBL_TKE

Just when slipping the clutch when leaving from a stop.