Proper ride height 2017 prostar

What is the proper ride height for 2017 prostar,i am getting vibrations 45-75,seems to vibrate less when going uphill,i had the mechanic check everything and he couldnt find anything,i have new kingpines,steer tires, alignment,balanced all tires and still the same so probably ride height is what is causing driveshaft to work at an angle.

 

This is what i found online,leveling valve is made by hadley on this truck

 

Never mind the valve, what type of suspension do you have? Is it the type in the picture or normal IROS International suspension?

 

Check here if you have IROS.
Vibrating 2002 International 9400

 

Not sure,ill take a pic tommorow.
If it vibrates less when going uphill then it needs more air right bcos when you go uphill system pumps more air into rear airbags when on on an incline?

 

Looks like ubolt and bump stop are touching on all 4 corners

 

Yep, that is just regular IROS suspension. So top of the Ubolt to bottom of axle stop at the ubolt nearest to the leveling valve. The touch marks between the ubolt and stop will happen when suspension is dumped or all air is leaked out of the bags too when sitting for a long time. Check the height with a loaded trailer on it with air pressure at a full charge.

 

My leveling valve shouldnt be pointing up,it should be perfectly level i think this is the problem,going to try to adjust tommorow or buy adjustable linkage

 

Never mind how the rod points. What is important is the dimension between the ubolt and stop.

 

Just measured it with engine on,parking brake released and on level surface,im about half an inch under 2.75