I want to go with 3.91 for my SS/M6 also but it's not as easy as it sounds. I've called a couple of car shops and neither of them would do the work. Hell I'm not even sure what I have to buy and I don't know how much work it is to simply change the gears. Is this a $500 labor mod, or $2000? Then someone on here said they have been waiting for 6 months to get into the dealer to recalibrate his speedo. How can I drive my car with an inaccurate speedo without getting a ticket?
From what I've read on C5 the 3.91 gears are the best for the SS and makes a very noticeable difference. Personally I would like to find a place that I can drop off my car and they will install the 3.91 gears that they supply but I haven't found any one that is willing to do it. Rarely do I ever buy parts that something isn't wrong, either the parts or wrong or there was something I didn't order.
It seems like such a simply thing to change out a few gears but it sure isn't turning out that way.
Russ
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