@fishbone. I can tell immediately when I've got a 1 psi difference between the F/R axle bias. I can hear it and feel it in the transmission.
Similarly I can tell when I'm off side-to-side by 1 psi or more because the car will pull (at the front), or push (at the rear), toward the lower pressure tire. Feels like the car is out of alignment.
- Pro amore Dei et patriam et populum -