It's a 1999, 96K miles on it.

Low rattly noise big at startup when cold then diminishes but appears at normal acceleration at about 1500 RPM then goes away as you accelerate past that point. When it shift and the RPMs drop, you hear it again. Then when coming to a stop, as you pas back down through that 1500 rpm range you hear it again. It is consistent. It almost sounds like the clutch on an AC unit going bad. Two shops have pinpointed it as the source of the noise. One tech said he thinks the sound is coming from the rear of the supercharger. From what I understand, there aren't any servicable parts on these units. You just replace them. Seems like it should be a simple bolt on application ( I Hope, I Hope) with a belt change/adjustment.

Thanks for your help and interest.

Jeff