[MPerry]

Great points, thank you all. I only replaced 1 air bag because it was leaking, very noticeable with bubble soap. Also before replacement the coach would not stay up after a few hours. The bag numbers are molded into the bags (firestone) so the same model number was used as replacement. (i think it was print on the metal plate too but only visible after removing it.) The coach will hold level now so I dont suspect leaking air bags at the moment.

I was thinking that maybe the old bags were lifting higher because they are worn (softer), but with considering the psi vs diameter I would expect the new bag to lift higher, so my idea there was wrong.

My thought on the air valve is that the one which lets the coach lower (while leveling), is also the one that prevents the air from coming out when in travel mode? In which case I think a leak on the right side down valve might cause lower pressure (and lower stance). I admit I have not crawled under to trace all the air lines back.

The coach does have 3 HCV. 2 on rear and 1 up front. I will have to check the 2 on the rear and see if they may be bad.