What is it? What are the symptoms it needs replacing? It took these guys 15 months to fix my AOD and when I got it back it shifts, but not what I wanted. The thing must have sat too long cuz there is super loud noise radiating from the air silencer box. When in park or neutral the idle will go to 2500 and howl like a bass banshee. Did sitting too long cause this? Help please....I know I will get lot's of it, so thanx in advance........1990 SC.....
Mark
Mark