[khgeisler]

On your coach you likely only have one six-pack in the rear. On coaches with a separate six-pack for the rear, they are typically mounted with the drive axle six-pack directly above the tag axle six-pack. My coach (#281) has two rear six packs. The six-pack for the tag will have an adjustable pressure valve with a gauge to set the tag axle separately. I don't think any of the Series 60 powered Newells had the separate six-pack for the tag.

If your tag axle switch were to have just two position it has a separate tag axle six-pack. These only have a normal and dump position. If it is a three-position switch (increase, normal, decrease) you only have one six-pack in the rear.

Hope that helps.

Wow, that is good info.  I do have a 3 position tag axle switch on the dash.  My owners manual says I should have a pressure regulator set to 25 psi for the tag axle.  I wonder if that is a carry over from pre series 60 coaches.  Currently it is missing.  The regulator was still installed as late as 2017, I have the sales video from MOT where it was present.