Callie thanks for the quick response. The issue is that his production date falls about 7 days out of the TSB's stated coverage. However the dealer has confirmed the clunk exists with this vehicle. The dealer has declined to pursue the TSB process do the date of manufacture. I agree a Star case may not be the correct course.
@bradphish From what I understand the normal course of action for this concern when it is not covered by the TSB is to replace the drive line. The new drive line should come with the lube installed. However they are currently on back order. My best advise is to check in with another dealer that has experience pursuing difficult warranty situations.