[T3] Auto Tranny Tuning

Dave Hall dave at hallvw.clara.co.uk
Mon Oct 28 14:50:09 PDT 2013

The twin carb automatics had a balance pipe with a T for the vacuum
modulatot.  I've got one somewhere, and the ends took 9mm hose to the carbs,
bu the vacuum pipe was connected with 7mm hose (part 21
http://home.clara.net/hallvw/type3/T3pbo/T3pb1-64.htm ). 

UK VW Type 3&4 Club

-----Original Message-----
From: type3-vwtype3.org-bounces at lists.vwtype3.org
[mailto:type3-vwtype3.org-bounces at lists.vwtype3.org] On Behalf Of Adam
Sent: 28 October 2013 00:53
To: type3 at vwtype3.org
Subject: [T3] Auto Tranny Tuning

I got my 70 square on the road today. There were a few problems, but it is
sorted out and ready to ride.

I need some help adjusting the shifting of the automatic transmission. As
she is now, she goes into second too soon and she doesn't want to shift to
third unless you let of of the gas fully and trick her. This is not good.

This is my first full auto VW. I need some tips and tricks for getting the
shift points figured out. Here is a link to a samba thread that chronicles
my build so that you can see what I have already done. 


I had to tee off of the balancing tube that runs between the two carbs to
capture a vacuum signal to run to the shift module. This might not be
optimal, so I am open to any suggestions that anyone might have for tuning
and vacuum signal. Here is a picture of how I robbed the signal. I have no
idea why they decided on 1/2" barbs out of the manifolds, but they did and I
worked with it.


Looking forward to hearing back.

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