Question about A4 vent tube
Thread Starter
Le Mans Master
Joined: Jul 2002
Posts: 7,370
Likes: 8
From: Slave to the evil empire
Cruise-In V Veteran
St. Jude Donor '04
Question about A4 vent tube
I pulled my tranny and found this, what in the heck is the check valve for and why is it T'd in the line :confused:
Instructor
Joined: Jan 2004
Posts: 169
Likes: 4
From: I celebrate their entire catalog
Re: Question about A4 vent tube (runamuk)
Using my 02 manual I couldn't find a definitive statement that says what it is exactly for.
I did find a note in the removal/replacement procedure for the vent hose that says to "observe the orientation of the transmission vent hose check valve prior to removal of the hose."
Upon installation, "orient the transmission vent hose check valve as noted during prior to removal". Not much help I know.
I did find a note in the removal/replacement procedure for the vent hose that says to "observe the orientation of the transmission vent hose check valve prior to removal of the hose."
Upon installation, "orient the transmission vent hose check valve as noted during prior to removal". Not much help I know.
Thread Starter
Le Mans Master
Joined: Jul 2002
Posts: 7,370
Likes: 8
From: Slave to the evil empire
Cruise-In V Veteran
St. Jude Donor '04
Re: Question about A4 vent tube (carpe dm)
To keep the yellow beer from flowing the wrong way...... :rolleyes: :D
seriously though, if you put a check valve in a vent line wouldn't you think it should be inline with the vent :confused:
Melting Slicks
Joined: Dec 2003
Posts: 3,315
Likes: 17
From: Near Jacksonville Fl.
Re: Question about A4 vent tube (runamuk)
I bet if you look at the vent in the end of that line it's a Tabs valve.
What that is, is a 1 way valve that allows heated air to escape but it closes when it's drawn against to prevent water intrusion into the transmission.
What the part T'd into the line is, is a restricter to allow a slow return of cool air back into the transmission. :crazy:
Your axle vent is a Tabs valve also, I thought I had a pluged vent on my axle untill I blew some air into it and heard the valve unseat itself. :D
What that is, is a 1 way valve that allows heated air to escape but it closes when it's drawn against to prevent water intrusion into the transmission.
What the part T'd into the line is, is a restricter to allow a slow return of cool air back into the transmission. :crazy:
Your axle vent is a Tabs valve also, I thought I had a pluged vent on my axle untill I blew some air into it and heard the valve unseat itself. :D
