The rear air shocks (level ride suspension) have crapped out. I don't know why. Most garages/mechanics I've asked about it don't seem very knowledgable about this suspension system. Does anyone know what the likely problem and solution is here? The car runs OK now, but it's got 146K on it, so if this is going to be a major expense it might not be worth the trouble. I don't want to pay someone a lot of dough to fix it only to find out it will break down again in a month or something like that. Any suggestions? And yeah, it's got the 4.1L engine. Thanks.