I've got a 98 EB Exp (no 4x4) with air suspension. Occasionally when I go out to drive it the rear end will be all the way down to the ground. Once I start it the compressor kicks on and airs it back up and eveything is fine. I can go for a day or two, even a week and it won't happen again. Any suggestions. I'm tempted to rip out the air suspension and go conventional but I'm afraid the ride will suffer. How easy is it to switch out...what would I expect to pay if I took it to a shop?