Just installed 4.10's on my auto. About the same as stock when it comes to the gear whine.
I also just installed the C & L, Excal 2 Alternative auto tune, and absolutely love it.
what's fun about 9 red lights within 1.5 miles, I don't consider shifting a million times fun. And just to be clear, I have a 91 LX 5.0 that runs 12.2@110 with a 5-speed, and my 05 auto is so much more consistent.
the dealer might be able to reflash for a speedo correction, but if you are worried about warranty issues, I wouldn't ask them. So, the only other alternative is a tuner.
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