So, yes as suspected it its the suspension load gage. It dropped when I aired down. Also, the other one is the brake application gauge.
And another TTR mystery solved,,,what a site!!! I figured a large car Pete had to have an air gauge. On mine, 63 lbs. was about 34K. It was dang accurate too.
Somebody stole the taped on sticker. Or it fell off from old age. Nothing but the best from peterbilt