take that line you are pulling off at the dryer and at the outher edn and blow out with air
replace it. it will cause your tires to wear.
Try checking all of ground wires for the cab and the engine
when was the last time the u-joints in the steering colnmb? sounds like one is binding .
it happens because air pressure is what the fan off. the lack of pressure is what turns the fan on
You have get the ride hight from the dealer. different makes have different settings. it is measured from top of axle to bottom of frame.
You say they changed the leveling valve. But did they set it to the correct ride hight?
