Fyi on this topic... I brought my 2005 Crossfire Limited for this issue and my service department told me that it was the "O" rings. I looked at the service documents and it stated that the fluctuation was due to my transmission leaking. The issue is a little better but I do feel like I am in a massaging chair sometimes at stop lights, I am taking it back tomorrow for this issue... I will let you know the out come.

By the way I am new to this forum.. I have been looking at some postings for a few months but I just registered today.