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Centerforce 12" DF clutch slipping or chattering on slow take-off from a stop

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Old 05-29-2006, 11:37 PM
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Default Centerforce 12" DF clutch slipping or chattering on slow take-off from a stop

I just installed the Centerforce's 12" DF clutch, pressure plate, billet flywheel, & throw-out bearing. I initially had the problem outlined in this other thread: https://ls1tech.com/forums/showthread.php?t=509483&referrerid=35176. I fixed that with installing a Mcleod adjustable master cylinder. But now when I take-off from a stop slowly, the clutch sounds like it's slipping or chattering until I fully release the clutch pedal. It shifts great everythime after the initial stop. I don't think this is normal and I adjusted the master down a little thinking maybe I had it adjusted up to high but that didn't help. Does anyone know what this could be?? I've only got about 50 miles on the setup so far. Do I just need to drive it some more to get it broke-in or do I need to fix something else now? I'm clueless on what else to do next, so any help would be greatly appreciated.

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Old 05-30-2006, 01:55 AM
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All clutches are typically more grabby and chatter when new. My 12" DF has a slight howl to it while engaging. Don't notice it unless I have the radio off.
Old 05-30-2006, 02:09 AM
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So that's normal then??? O.K. sounds good to me.
Old 05-30-2006, 04:03 PM
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Does it sound kinda like the humming/whining a power steering pump makes when it starts going bad??? That's what the clutch sounds like on a soft take-off from a stop. I just want to make sure that everything is good to go with the clutch cuz it sounds a little different. Will that sound go away after it starts breaking in????
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Old 05-30-2006, 11:10 PM
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its the chatter, it will go away after a while
Old 05-31-2006, 12:02 AM
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Thanks I'll keep cruising through the break-in then. Only 420 miles to go... then the fun starts again!!!!!
Old 06-02-2006, 08:20 AM
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I have ~1500 miles on mine and it still does it. May have something to do with my 17lb light-weight steel flywheel and or pulling 4500+lbs. It doesn't bother me though.
Old 06-14-2006, 12:43 AM
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O.K., I've got my 500 miles on the clutch finally and the chattering has gone away. I'm glad it all ended up being good to go, because I was at the verge of breaking some **** because of the problems with the clutch. After it's all said and done now though, I can't blame Centerforce. It was worn out hydraulics and/or still more air in the system that was causing all the problems. With the new master installed and a 500 break-in done this damn clutch grabs like a moffo. I can't believe how hard the car launches and accelerates now without the worn out piece of garbage stock clutch. I would recommend this 12" Dual Friction centerforce to any f-body driver. You can't beat this setup for the price. Later
Old 06-14-2006, 01:02 PM
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So did you get their steel billet flywheel also?? That's the exact same setup that I'm going to be going with...How much hp are you running??
Old 08-05-2006, 06:42 PM
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Ya I'm running their billet flywheel also. Right now I'm running about 450 at the wheels. The whole setup is working like a champ now.
Old 08-05-2006, 10:51 PM
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I got mine in too and I absolutely love this setup...I replaced everything except for my master cylinder...I can actually launch the car and I can't believe how user friendly it is...it grabs so much earlier than the stock piece of ****...
Old 08-06-2006, 01:50 AM
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Do ya'll have any probelm gettin into 3rd and 4th gears at WOT, in the higher RPMS, at all?

-Will
Old 08-06-2006, 04:43 AM
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Nope no problem going into 3rd or 4th at all.



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