Hey llama_boy, I decided to go with 4.10s myself after a lot of reserch. I figure we should gain about a half second in the quarter, and should be some great pull when going thru the gears. How do you like yours? And is it a lot of work when crusing around compared to the stock ones?
Does changing out for 4.10 gears do anything to your gas mileage? I don't know much about all of this, but it seems to me that lower RPMs at higher speed would equal better gas mileage, yet you're getting "more power" out of the switch, and conventional wisdom says "more power" means worse gas mileage.
The 4.10s produce higher RPMs at lower speeds. According to the chart listed above, there is a 500 RPM increase at 70 MPH with 4.10s over the stock gears. So yeah you will see a bit of a downslide in the MPG.
I have done ALOT of research on this.. but the following info IS second hand.
Burning fuel = power. It doesn't equal RPMs. This means that running out car @ 70mph will require the same HP with 3.27, 3.73, or 4.10 gears therefore the MPG is the same. The added RPMs do take a little extra fuel therefore the MPG change a little, very little. I have seen posts that put the amount aruond 5% or 1-2MPG.
What are you worried about MPG for?? Gas is cheap! It's the car payment, insurance, and mods that will get ya! :wink:
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