I got my 4.10s in last week and just completed the 500 mile break in and oil change, I am very pleased with my choice so far, I really think 4.56 would have been too much, and I wouldn't be able to get traction anywhere. Also my MPGS, jumped by almost 5, I am getting a custom tune Wednesday.
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Good to hear, I have a tune already, which is another reason why I'm going with the 4.10's. Pretty sure I'll be more than happy with them and the BB tune together.
Where did you get your gears from? I was just looking at getting these...