This has only happened one time ...

First, a confession: I had not raised the rear end from being parked on a sloping site and I had raised the tag (I was very distracted). Maybe those things caused the emergency brake to not release but I don't think so. I tried it again a couple of days later and this did not happen.

I had released the brake, put the bus in drive and it wouldn't move. It lunged just a bit as if the brake was on. Back to neutral and cycled the brake on and off a few times. All air pressures appeared normal. Everything sounded normal. Tried reverse and it wouldn't move. Put the tag down, put the bus at ride height, the transmission back to drive again and it moved fine and then noticed nothing odd while driving or stopping.

Could this be a bent or corroded mechanical link or rod? We're 250 miles from a Prevost shop. Could this be trusted to a truck shop? I'm pretty sure I don't want to mess with brake chambers if that's the issue.

Anything I can check with a visual inspection? Thanks.