ok - but has to wait until next week i am in Colorado skiing this week..
Seems to me it would be in muffler or cats on mine - it is like something is loose and rattling at high rpm - only does it on 1-2 or 2-3rd gear shifts

 

^ Yeah now that you mention it I have had it occur a couple of times on 2-3 but very brief.
If it does turn out to be cats at least they could potentially be covered by Porsche (IIRC 8yr/80k mi warranty). But how do you check / verify if a cat is bad?

Have fun skiing, snow must be great over there. I'm off to Mammoth this weekend for some boarding and "do some bonding" with the CTT -

 

Thanks man I am in Crested Butte, Co. Snow is just awesome with more coming, as well as no crowds - looks like a possible place for retirement....I assume my 99 won't be covered for cat replacement if indeed this is the issue even though car only has 28k miles