Re: 4.56 or 4.88...that is my question.
4.56 gears with 38's (which actually measure about 37) is the exact equivalent of the stock 33" tall tires (though they are listed as 35's, they are really only 33" tall) with 4.10 gears.
When I did my first H2, I did the 38's and the truck was gutless. I lost 2-3 mpg on top of it.
I installed the 4.56's and it brought the gear ratio (and speedometer) right back to where it was from the factory.
The truck gained my lost mileage.
Now, having said that... I would have gone with 4.88's.
In fact, I just made a post because I JUST got off the phone with Summit and ordered some 4.88's.
Even with a supercharger, the stock 4.10's with 38's aren't enough.
Mark
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