by 
Anonymous
ANSWERS: 3
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There are several different ratios available. The one installed on your truck can be determined by reading the option codes (RPO) on the sticker in the glovebox. (I think that is where it is) Look on the list of three digit (letter or number) codes and find the ones that start with F. Comment them back to me and I can tell you.
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hello, i do not know the stock gear ratio, but if you count the number of teeth on the ring gear and divide it by the number of teeth on the pinion gear that will give you your ratio. hope this helps.
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look in the glove box for a sticker with codes on it there sould be one that starts with g or h gt4=3.43 gt5=4.10 gu4=3.08 gu5=3.23 gu6=3.42 hc4=4.56 if it has a limited slip or posietraction u will see a g80 in the code list
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