Clutch shudder

[Rainer S.]

Besides restoring a 63 SWC Fuelie, I also have a 71 El Camino SS 454 CI.
(I hope I am allowed to ask a GM related question, other than Corvette.
Since engine and transmission are similar to Corvettes, someone may have the answers)
The problem I am having is, when the engine is cold, when starting out in 1st gear, the cluch action is normal, that is, I can excellerate normally by letting the clutch slip a bit to get going.
When the engine is at normal temp (approx 160/180 degrees F), when starting from a stop in 1st gear, I experience a "shudder" when letting the clutch out. Even when I keep the engine RPM up.
What could be the cause if this ?
The trans is a "rockcrusher" 4 speed, Clutch apears to have very little travel, before it starts to grab, even when cold. Previous owner used car for drag racing, so the clutch may be set-up for this type of driving. Rear end has a 3.25 ratio, as close as I can tell. There is no emission stuff on the engine.

Rainer

[David M.]

Re: Clutch shudder

It could be a number of things. Hard to tbl-shoot w/o seeing, feeling, looking etc... That said, the flywheel may need resurfacing. The fork or T/O bearing may be bent or worn, respectively. Could be the clutch disc itself; broken spring(s)or worn/bent fingers etc... Best to check and correct before its a safety issue, especially since you said it was raced. Make sure the free-play is properly adjusted and the linkage is ok before ripping into anything.

[Rainer S.]

Re: Clutch shudder

Thanks, Dave. I will have to look into the items you suggested.

Rainer