I lowered my tire pressure to 30 psi on my 37 inch terra grapplers. My issue is with the traildash (I think). I was under the impression that when I set the psi on the traildash that tells my jeep when to turn the warning light on? I set the psi on the traildash to 28 so I could run my tires at 30 with no issues. Well, my jeep says that I have 30 on front driver, 30 on rear driver, 31 front passenger, and 31 rear passenger. The only one flashing is front driver. Does anyone know anything about this?