Originally Posted by texas t
HMMMM maybe a defective rear end

, look at the wavetrac replacement if you have a srt 6

Wouldn't be rear end since car "grinds and clunks" standing still.
I'm not an expert on automatic transmissions but I suspect that you need a new one. Better answers than this will follow. Not better as to outcome, but better as to definitive explanation.
My condolences.