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Registered
Join Date: Oct 2006
Location: MYR S.C.
Posts: 17,321
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clutch chatter in 1st
what are some of the causes of clutch chatter? hot spots on flywheel? broken spring on disk?
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86 930 94kmiles [_  _] RUNNING:[__] NOT RUNNING: ____77 911S widebody: SOLD88 BMW 325is 200K+ SOLD 03 BMW 330CI 220K:: [_ _] RUNNING: [__] NOT RUNNING:01 suburban 330K:: [_ _] RUNNING: [__] NOT RUNNING:RACE CAR:: sold |
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07-16-2007, 09:47 PM
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#1 cause is a worn clutch disk.
Oil leaking onto the clutch Soft or broken motor / transmission mounts Loose transmission to engine mounting bolts
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Rex 1975 911s and 2012 Range Rover Sport HSE 1995 BMW R1100RS, 1948 Harley FL |
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07-17-2007, 04:20 AM
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Join Date: Sep 1999
Posts: 944
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All of the above.
Tom
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R Gruppe #111 Early S Registry #235 res ipsa loquitur |
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07-17-2007, 06:12 AM
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Senior Member
Join Date: Feb 2000
Location: Lacey, WA. USA
Posts: 25,310
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I recently replaced mine, which was chattering. It was also a bit contaminated with oil. John Walker's observation that rear main seals almost never leak is certainly reliable. Indeed, if the rear main seal did leak, the flywheel would throw that oil out onto the bellhousing anyway, instead of onto the disk. Clutch disks get contaminated from transmission oil crawling up the tranny input shaft. I replaced that seal. In fact, I installed the new seal in a slightly different position to keep it from rubbing on the part of the input shaft that was showing some wear from past seals.
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Man of Carbon Fiber (stronger than steel) Mocha 1978 911SC. "Coco" |
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07-17-2007, 08:26 AM
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It can also be something as simple as the clutch cable adjustment and preload of the Bowden tube.
TT
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Tom Tweed Early S Registry #257 R Gruppe #232 Rennlist Founding Member #990416-1164 Driving Porsches since 1964 |
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07-17-2007, 08:58 AM
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1975 Porsche 911s
911
Ultima GTR
LeGrand DSR
GT3
