I have recently purchaced my new daily driver, a 1995 2 Door Chevy Tahoe Z71 5speed stick. It has around 148,000 miles on it. The PO said he replaced the clutch, but I believe there are some issues with it. There is some pretty good chatter when starting from a stop going forward and also in reverse. This only happens when the engine is at running temperature. Mind you, i also have a 1971 Blazer with a sm465 in it, which i drove for 4 years before getting the Tahoe in April of this year. I Drove the Blazer with its old clutch and with the new one i installed while rebuilding the drivetrain........no chatter whatsoever....even with the old worn clutch. So i am ruling out driving style/ not knowing how to operate a clutch . So i was thinking maybe there is a broken finger on the diaphragm or maybe the clutchplate/flywheel is glazed or pices broken off the clutchplate. Sorry for the long post but wanted to get the facts and history in for a good diagnosis . Any help with figuring this out is greatly appreciated, i just wanna know what im looking at before i tear everything apart . Thanks again.