Brake question, 2000 Journey

[mopargo]

I guess this is the right forum for this question, while returning from a trip this week I noticed the air guage needles were both dropping slowly to 100lbs and then pumping back up to 125 lbs, normally one needle stays up and the other drops then returns to 125, after a few mile's they returned to normal, but at every stop the same thing happened. the brake's worked fine, and never went below 100lbs, but they are acting different and it concerns me, what do I check?

[mopargo]

I guess this is the right forum for this question, while returning from a trip this week I noticed the air guage needles were both dropping slowly to 100lbs and then pumping back up to 125 lbs, normally one needle stays up and the other drops then returns to 125, after a few mile's they returned to normal, but at every stop the same thing happened. the brake's worked fine, and never went below 100lbs, but they are acting different and it concerns me, what do I check?

[mopargo]

Well I found my problem already, an airline leak in front above the air valves, Im taking it in to frieghtliner tomorrow for repair, thanks all.