Clutch Chatter

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Nov 3, 2016 | 09:16 PM

lalberts

Thread Starter

Tuned

Joined: Oct 2016

Posts: 255

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From: South dakota

Clutch Chatter

I have a 1973 F-250 with a 390 4 speed. When the engine was First rebuilt everything was fine but now the clutch is chattering when take-in off especially when warmed up. I removed the tin shield over the flywheel and did not see any oil on the clutch or surfaces. Notice a very slight film of oil on the Trans side and Engine side is Dry. What would make the clutch Chatter?

Nov 3, 2016 | 09:22 PM

redcreekauto

Senior User

Joined: Oct 2016

Posts: 401

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From: Rockville, IN Temporarily

Any oil on the surface of the flywheel, pressure plate or clutch disc itself would cause it to chatter. Broken springs on the clutch disc itself would as well. The noise could be the throw out bearing possibly but its hard to diagnose sounds over the web. If there is oil on those surfaces you can try using some brake cleaner to clean the oil off. It will not hurt the clutch disc. Do this only when the engine is off. Also helps to have someone push in on the clutch while spraying inside the bell housing. Wear eye protection! It burns something fierce when it gets in your eyes.

Nov 3, 2016 | 09:47 PM

Rollingscrapmetal

Tuned

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Check how tight the bell housing bolts are

Nov 3, 2016 | 10:12 PM

lalberts

Thread Starter

Tuned

Joined: Oct 2016

Posts: 255

Likes: 2

From: South dakota

When I get a chance I will remove the Bell housing shield and Do that with brake cleaner and check bell housing bolts while I am at it! Will Let cha know! Thank you!

Nov 4, 2016 | 08:14 AM

78 PEB

Cargo Master

Joined: Oct 2010

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From: Ideeho

Did you resurface the flywheel when it was all apart? Hot spots on flywheel will cause chatter, new clutch I presume???

Nov 4, 2016 | 08:42 AM

PA74F250

Cargo Master

Joined: Jul 2010

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From: York, Pa

Driving style also puts hot spots on the flywheel.

Nov 4, 2016 | 09:35 AM

78 PEB

Cargo Master

Joined: Oct 2010

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From: Ideeho

Oh so true PA74F250!!!!

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Nov 22, 2016 | 11:02 PM

77&79F250

Moderator & parts slinger

Joined: Feb 2007

Posts: 50,254

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From: S/W Missouri, Polk county

Chatter sound when running at an idling and it is neutral? Does it go away if you push in the clutch? If so I'd bet throw out bearing.

Or on take off have a shutter in the drive line? Oil on the clutch face, leaking rear main.

Dec 4, 2016 | 10:34 PM

#10

lalberts

Thread Starter

Tuned

Joined: Oct 2016

Posts: 255

Likes: 2

From: South dakota

The clutch does it when releasing it, Not so much a chatter noise but shudder when released. i was told it could be oil contamination so I blocked the clutch peddal down and sprayed brake cleaner on it to wash away contamination. It did not appear to be bad but after I sprayed it was good but it came back again but not as bad