i just notice mytruck not have the original air suspension instead have coilovers shocks seems to be from expedition this is what tell me the mechanic well i check my navi and found in front of battery area i think the compressor and on all 4 corners i see the rubber lines with some bolt on it to block the lines what more components use my air susp and also i don't nave any alarm/warnings from my dash panel why? i think if you do this maybe the computer tell you something wrong with the suspension , i want to know all i need to convert back my truck in the original state , by the way mine is the top model with 4x4 i say that cuss i read some where the 4x4 comes with diferent struts then 4x2 if anyone can help me please thanks and sorry for my bad grammar cuss i speak spanish and i try to do my best on translated all without a translator thanks