I had the shuddering noise and the whining as well.
Everyone thought it was a wheel bearing, that's what it sounded like but I knew it had to be the transmission.
I finally brought it in to a different dealer and they found broken gears, and some burnt out parts, they said it was too costly to fix and replaced the whole transmission.
Remember, get a second opinion or a third and be adamant about the problem.
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BLACK 2007 GT Special Edition Package