Date: Thu, 19 Oct 2006 11:42:41 -0500
Reply-To: Jim Felder <felder@KNOLOGY.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Jim Felder <felder@KNOLOGY.NET>
Subject: Re: Gear crunching on rebuilt trans
In-Reply-To: <vanagon%2006101911383842@GERRY.VANAGON.COM>
Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
Has your shop thought to adjust the shift linkage? How long have you
owned your van?
The reason I ask is that for many vanagon owners, the transmission
begins shifting sloppily at some point in the life of the
transmission, so the shift linkage gets adjusted to compensate for
the wear. If your transmission gets the wear "reversed" by
rebuilding, then it may need to have any/all previous adjustments
"reversed" too.
Also, you say that the hydraulics are excellent, but has anyone
actually measured the movement of the slave cylinder arm? It may be
coincidental that your hydraulics show a problem at the exact timing
of a transmission repair, but it wouldn't be the first time such a
coincidence has happened.
I had to get my linage adjusted when I had the five-speed rebuilt in
my diesel westy. It simply wouldn't even go into second unless the
car was stopped, in which case I could start from second but couldn't
shift back into it during normal operation.
I did not own the car from new, so I have no idea what adjustments
had been made, but I can say that this adjustment fixed the problem.
At the same time, my 90 carat started shifting poorly at about 190K
miles, and within a week of the westy's adjustment, i had the same
done to the carat. I owned that car from new so I know that was the
first time such a compensating adjustment was made.
It's something you should at least ask about. Seems your shop would
be happy to put in a few minutes to try it.
Jim
On Oct 19, 2006, at 10:26 AM, Geza Polony wrote:
> I had my 4 speed trans rebuilt about 9 months ago by an SF Bay Area
> expert,
> but when they put it back in, it crunched when shfting fast from
> 1-2 and
> 2-3, especially noticeable climbing hills. A couple of weeks ago I
> took it
> back and they pulled the trans, changed synchro rings, and put it
> back in.
> Now the 2-3 crunch is fixed but it still crunches when speed
> shifting 1-2.
>
> I'm going to bring it back in again. But I want to have some
> information on
> why it would do this. I was under the impression that if you change
> the
> synchro rings, it stops crunching. But apparently there's a
> conflict between
> moly synchro rings and Redline synth oil, or some such.
>
> Clutch plate, hydraulics, etc. are excellent.
>
> Any transmission people care to comment?
>
> Again, these are reputable rebuilders. I'm not out for a vendetta,
> just
> trying to understand the problem better to get it fixed. Other than
> that,
> the shifting is great. What's going on?
>
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