Air pressure bleeder sounds like someone is using an air nailer in my cab?

[nukem]

Just to close this out, I replaced the air governor and my nail gun sound went away. I removed a vented plug from one of my axles to use on the governor.

I then put npt/ barb fittings in my axles. I then very loosely ran tygon tubing teed together into the cab.

I hope this can then be turned into something sort of like Rusty's deep fording kit eventually.