Well, looks like I am in for another round of air ride work. Went out this morning and found the back of the car slammed, with the driver side sitting a little lower than the passenger side. It pumped up ok, but while it was down, I took the oppertunity to quick detail the roof, since it was easier to reach and all I don't know if it is the spring, or the valve, but seeing that the car is 12 years old and has 126k on it, I'm betting it's the spring. Has anyone changed these? Any instructions posted like the ones for the fronts? Thanks...