Date: Fri, 14 Dec 2007 18:17:46 -0500
Reply-To: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Subject: Re: transmission
In-Reply-To: <136500.69147.qm@web82710.mail.mud.yahoo.com>
Content-Type: text/plain; charset="iso-8859-1"
Usually, if the coupling sleeve cracks it is due to a failure deeper in
the tranny. A bad needle or roller bearing can cause a failure along with
a worn out gear carrier housing. Anyway, even if it is a broken sleeve,
not overhauling the tranny will lead to temporary solution.
Dennis
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
David Kao
Sent: Friday, December 14, 2007 5:58 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: transmission
I should clarify it further.
I now have to start the engine with the clutch pedal depressed (clutch
disengaged). Everything will be fine (no noise) and I can shift to every
gear.
But as soon as I gradually release the pedal (begin to engage the clutch)
the noise begins. This includes that the gear is in neutral.
Scott is probably right that it is input shaft or the tranny's main shaft.
My guess is in the sleeve that connects the two. The traany's main shaft
has all the geras, sliding hub, sync rings for the 3rd/4th so it must be
heavy to turn. If the sleeve is cracked the input shaft will skid and
make noise from grinding the teeth on the sleeve. It is possible too that
a shaft is broken off and is hitting everything it touchs when it spins.
That has been in my nightmares. I like the idea that the sleeve is
cracked.
My clutch has a long chattering history. I wonder if this can cause the
sleeve to wear out and crack eventually.
David
David
--- Scott Daniel - Shazam <scottdaniel@TURBOVANS.COM> wrote:
> There's a very common misconception, that any noise associated with the
> clutch pedal is 'throw out bearing.'
> Yes, if pushing the pedal done causes noise, then you think TOB.
> But this guy said letting the clutch pedal up in neutral causes noise.
> That, 'normally' would not be TOB.
>
> Try this......idling in neutral, with the clutch up, listen for noise.
> Then push the pedal down, if it gets quieter, the noise you are hearing
has
> to do with the input shaft or main shaft of the transmission.
> If you really want to hear that bearing noise, press a wooden dowel to
the
> shift knob, and the other end to your ear - the shift linkage often
does a
> nice job of bringing those noises forward.
> So please - if clutch down gives noise - you think of TOB
> If clutch pedal down equals quiet, you think of transmission main shaft
> and/ or bearings usually.
> There are exceptions to everything of course.
>
> There has been confusion about clutch pedals, free play, and throw out
> bearings forever.
> But it's really very straight forward.
> Scott
> www.turbovans.com
>
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
Of
> Yves Demers
> Sent: Friday, December 14, 2007 1:36 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: transmission
>
> nobody went for the throw out bearing, thats where my money is. As for
> rebuild or used, having just installed a rebuild,
> the effort to install it isnt something that I would like to do often,
so I
> would ( and did ) go for the best (most expensive) option
> so that another swap hopefully isnt required. P.S. do yourself a favor
and
> replace all the bushings and the shifter cup while your at it.
> Yves
>
>
>
>
>
>
> I did not mention, my 84 Vanagon broke its transmission last week.
> > I heard a loud snap from the rear, like breaking an axle and I lost
> > power to move forward. It was in first gear trying to move into
another
> > street on a right turn. I can still shift back and forth to every gear
> > including reverse. But As soon as I try to let go the clutch pedal I
> > can hear noise from the transmission. So the transmission is toast.
> > I have one used cheap spare that I can replace. But once the engine
> > and the transmission is dropped I have a decision to make between a
> > real quality rebuild or a cheap one by myself. I do not need to do
> > anything with the engine if I want to go the cheap route. If I want
> > a quality one then it's a lot of money and the engine should take
> > the opportunity to be done as well.
>
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