Date: Thu, 16 Sep 2004 23:30:11 -0500
Reply-To: Al and Sue Brase <albeeee@MCHSI.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Al and Sue Brase <albeeee@MCHSI.COM>
Subject: Re: Shifting Shudder Part II
In-Reply-To: <414A2B60.9000509@charter.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
John:
I'm really skeptical if/how oil leaking from the rear engine seal would
EVER get onto the clutch. I think it would be on the engine side of the
flywheel. upon migrating to the outer edge would it not be flung off to
the inner side of the flywheel housing? Whereupon it would run down one
side or the other and drip out the bottom. There would have to be a
DELUGE in there, or 2" deep to get on the disc! If the seal leaked that
bad, a ruined clutch disc would not be your number one problem.
A leaking transaxle input shaft seal, WOULD put oil almost directly onto
the splines of the disc. Centifugal force would soon move it to the
friction material.
The bad news is: Every failed trans seal that I've found was riding on a
grooved input shaft. Changing them is pretty easy, but involves taking
the trans apart a little. And you need a circlip pliers. One of the seal
companies might make one of those repair sleeves, which would make
repair a bit easier yet. (And the apparently work !)
Having said that, EVERY shuddering clutch I've encountered has had an
unevenly worn release fork. The clutch cannot possibly release smoothly
if the bearing surface is not parallel to the flywheel.
Al Brase
69 doublecab, Vanagons
John Rodgers wrote:
> Even small amounts of oil leaking from the flywheel seal is sufficient
> to cause clutch shuddering if it gets on the flywheel /clutch disc
> interface. My seal leak was minimal, no dripping, just a wet place on
> the housing, but it very effectively killed the clutch.
>
> John Rodgers
> 88 GL Driver
>
> Michael Rule wrote:
>
>> Hi All,
>>
>> Thanks again for all the diagnosis suggestions, and clutch slave cyl.
>> explanations!
>>
>> Another question occurred to me while considering the suggestions
>> offered: If, as suggested by a few, the clutch is "shuddering" due
>> to a blown "clutch seal" (which seems to be analogous to a Detroit
>> Steel rear-main seal) leaking oil onto the clutch plate, is it a fair
>> presumption that the engine would have to be leaking heavily to slop
>> onto the clutch and cause trouble?
>>
>> I have (apparently) have no (visible) engine oil leak, altho it
>> appears the tranny is seeping from somewhere (visible moist buildup
>> of fluid on tranny and engine... oil? tranny fluid? dunno! on the
>> outside of the case)... will sniff-test to try to identify this
>> weekend.
>>
>> On a standard "front of engine is front of car" setup, it's easy to
>> imagine oil leaks blowing back onto a clutch/ tranny, esp. from a
>> blown rear-main... on these rear-engine critters, it's tough for me
>> to imagine... but then, I've no experience with these engines, that's
>> why I'm on The List!
>>
>> Cheers,
>> Mike
>>
>>
>> ---------------------------------
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>>
>>
>
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