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I just installed a new SPEC Stage 3 Carbon clutch to replace a toasted Stage 3 Kevlar in my ’94 Z28. The installation went well but I seem to have bad chatter engaging 1st gear from either a stop or slight roll. Hill starts are impossible -the whole car shakes. I’ve tried varying the amount of slippage and rpm when starting off, but I can’t seem to get a smooth engagement. Shifting between the other gears once underway is smooth, and the clutch is not slipping.
Is the clutch grabbing too soon as it is not properly broken-in? It appears that it just grabs and then bogs the engine to the point of stalling resulting in shuddering. Is this normal?
What is the break-in procedure for this clutch?
Can anything be adjusted to eliminate the engagement chatter?
Mine did that. It has gotten a little better with some milage, but slow moving in a parking lot just gets it a chattering. It is more just a noise now than it is a shake the car kinda thing. Mine worked better with more RPM on slow starts.
Now, I do not recall much of a problem on slow starts. When I first put it in though I was trying to figure out what was wrong. Swapped back to a McCleod I had sitting on the shelf, but put the Spec back in after burning that one up. Next clutch I buy will definately be a twin disk McCleod. The SPEC is working well for racing but the drivability is not all that great.