Rapid loss of primary air pressure to zero PSI.
Brakes lagging to release.
Brakes not completely applying
Started leaking air really bad on the trip home last month
kpzra was kind enough to crawl under the truck and confirm my suspicion last week when I was home. Her and Ranger_375 along with munchkin stopped by to see us.
So the delay going out after my July 4th holiday was stopping and getting this valve replaced.
Parts and labor
Needed several fittings as well to replace the valve too.
At least I'm holding air pressure now.