clutch chatter issues

Grumpy · Sep 17, 2017

Installed Chevy 502 crate motor awhile back. I installed new fly wheel, pilot bearing, clutch, pressure plate, throw out bearing, clutch fork. It chatters up shifting and down shifting. Pulled it apart and replaced clutch and pressure plate, throw out bearing, with a different brand. It still chatters, no change. What the hell? When I installed the pilot bearing I drove it in flush, could it be in to far allowing the shaft to move? I just don't get it. Any help would be appreciated. Thanks

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since youve already replaced the clutch disc and pressure plate, I'd point out that,
many times clutch chatter is the result of an un-even flywheel surface, any decent machine shop can surface grind the existing friction surface a few thousands to correct that issue.
clutch chatter is the result of un-evenly applied clamping surfaces, usually a high spot(S) on the clutch pressure plate its housing or the flywheel surface,
be damn sure the bell housing is properly aligned/centered, on the block to line up the crank center line, as if its not that will cause the issue.
but grease and or oil on the clutch disk, or loose disc pads could also be too blame ,
as can a warped pressure plate ,loose or broken engine or transmission mounts and heat warping or a broken spring or mis-aligned pressure plate spring will also cause this symptom.
the flywheel should be torqued to the crank flange, an impact gun should never be used as its possible to warp the mount surfaces is tightened un-evenly
if the clutch vibration does not go away once the clutch locks up,
you've more than likely, got a drive line component alignment or rotation assembly or drive line balance issue.
you'll want to verify the flywheels mounted so its not wobbling, it may be warped,
or the crank flange its mounted too has been bent or theres debris between the flywheel and crank flange,
you,ll want too use a dial indicator mounted on the block and rotate the flywheel to find out,
if the flywheel friction surface or outer diameter
,changes its distance from the block as it rotates

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Strictly Attitude · Oct 1, 2017

All bellhousings should be indexed tremecs are real sensitive to this.

clutch chatter issues

Grumpy

The Grumpy Grease Monkey mechanical engineer.

Strictly Attitude

solid fixture here in the forum