[rheavn]

    Chester,
I'm going to agree with russ on that regulator being for your slide seal.

Some time in the late 80s or early 90s Newell quit making the tag air bag pressure adjustable. I know there is a switch on the dash, but all that does is release tag air pressure through a solenoid system. Check out this rear suspension air diagram to understand how it is plumbed. Note: the tag air tank is two tanks that are welded together on the inside, so the left & right acts independently. If you want to call me to discuss it I'll PM you my number.