ID Auto Tranny Part? Vacuum Part?
 

I can't seem to find the part that connects to the vacuum line at the tranny. Vacuum Modulator?

if you have the PET diagram, look at illustration 308-55. I think its the pressure control valve #26, Depending on your tranny, either 126 270 257 9, or 126 270 937 9.

Of course, double check to make sure I am correct...

Here is a diagram c/o DC auto.
http://forums.pelicanparts.com/uploa...1237518792.jpg

I am looking at PET and don't see a 308-55, mine only goes to 308-10 then 309. I have a 1981 3 speed. Am I using PET incorrectly?

Hmmm, my diagram was from a 4 spd apparently.

928 (1983-1986) (A28.01/04)

but what about a
http://www.pelicanparts.com/cgi-bin/smart/more_info.cgi?pn=OEM-1232700079&catalog_description=Genuine%20Porsche%2 0Part%3A%20TRANS.DIAPHRAGM

MPDano- here is a scan from a "82" MY service manual. I have more info on shift point adjustments if you are interested. Hope this helps.
Johnhttp://forums.pelicanparts.com/uploa...1237592813.jpg

Sorry about the first post, wrong pic!

icy-hot, that's it. Do you know where this is in PET or a part number?

Another diagram.

18
1002703307
Hydraulic control unit for control pressure with regulating valve
A22.01/02
$186.80

(18)
7222701007X
Regulating valve
82
A22.04
$175.06


http://dcauto.gotdns.com/illustration/index/61730806

http://forums.pelicanparts.com/uploa...1237620449.jpg

I actually plugged the vacuum line that goes to this modulator and I like the shifting better. Before it was very mushy, it shifts better now. Is this bad to not use this vacuum modulator? Also, I can still hear some sort of vacuum when I accelerate, so this is not the source.