Date:         Sun, 16 Apr 2017 09:21:02 -0700
Reply-To:     Neil N <musomuso@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Neil N <musomuso@GMAIL.COM>
Subject:      Re: Shift linkage? 84 manual transmission
Comments: To: David Beierl <dbeierl@attglobal.net>
In-Reply-To:  <CAMOH8LLMWm6L4P4_5E0dioK=T1rxJpQkagezoF_Uwii=1LZQnQ@mail.gmail.com>
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Caveat; ive never seen a 5 speed shift linkage so im guessing that the
shift box above the spare tire is different than the 4 speed but....

Looking in at the shift box above the spare tire, watch the ears at end of
the shift rod end while a helper moves the shifter through all the gears.
Doing so helped me better understand how the linkage works. Especially in
regards to selecting the reverse gear.

Re: reverse gear. Though your bus has a 5 speed, my GUESS is that similar
to the 4 speed, there is an angled piece of metal on the shift box. On the
face of that piece of metal, there should be a medium sized boss
(bump). When shifting the transmission into reverse, as the shift lever in
cab is released upwards, an ear on the the shift rod end "lands" to one
side of that boss. That boss helps keep the shift fork ear (thus the shift
lever in cab) "locked in" to the reverse position. When that ear (or cup
ball spring at base of shifter?) wears too far, the shift lever will tend
to slip out of the reverse position but the transmission will likely remain
in reverse.

 Neil.



On Saturday, April 15, 2017, David Beierl <dbeierl@attglobal.net> wrote:

It's much simpler than it appears, it's simply a big lever up front with a
> connection to a smaller lever at the back such that the small one
> duplicates the left-right and forward/back but not up/down motions of the
> big one.
>
> The linkage is a tube that transmits left/right motions by rotating and
> forward/back ones by sliding forward and back.
>
> The surrounding structure limits the movements of the big lever so that
> they correspond to possible motions of the small one, which can only move
> forward and back at specific left/right positions.  And it prevents the big
> lever from moving into the position that would engage reverse gear unless
> you perform a specific extra downward motion of the lever to get past the
> regular limit stop on that side.  The linkage does not transfer that motion
> to the rear as there is no need -- the gearbox itself will happily shift
> into reverse at any time.
>
> Yrs,
> d
>
>
>

> > > -----Original Message-----
> > > From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com
> <javascript:;>] On Behalf
> > > Of Don Hanson
> > > Sent: Saturday, April 15, 2017 11:44 AM
> > > To: vanagon@GERRY.VANAGON.COM <javascript:;>
> > > Subject: Shift linkage? 84 manual transmission
>
>
.......


>
> > >    I'm really amazed at the linkage...and how it can get all the way
> from
> > > front to back to work the gears. There's just too much going on under
> > there
> > > with interconnected leverages, vectors, etc. to actually deduce how it
> > all
> > > does the job...
> > >     Anyone care to advise on what​I need to do for these two different
> > (?)
> > > issues?  I'm​ guessing it will be something just below the  floor,
> > related
> > > to the adjustment for the shift lever base, maybe something else for
> the
> > > reverse "gate"...
> > >
> > >
> >
>


-- 
Neil n

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