Ideal Gears For 05 Stock 20's with 275/65R20 Tires - Ford Powerstroke Diesel Forum
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Old 05-19-2010, 11:23 PM Rookie

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Ideal Gears For 05 Stock 20's with 275/65R20 Tires

Hey Guys,

I have been a member for awhile and learned a lot of good info about my truck but never posted until now. My truck used to have an 8" lift with 38.5x14.5R20 tires and 4.56 gears. It ran great, highly recommend 4.56's with 38's. I am getting it dropped back down to stock with a leveling kit this week. I bought the 05 stock 20's with stock Goodyear 275/65R20 tires (34.1"). However I can't decide which gears to go with, either 3.73 or 4.10? Both will also cost me the same.

I have searched in the forums and have not been able to find the info I need. I know 4.10's work well with 35's and 3.73's work well with stock tires. My original gears were 3.73's w/ stock tires and I loved it. So what do you guys recommend? I do tow with the truck but I also would like to get good milage unloaded; and what kind of milage will I expect to get with the gears in town and highway unloaded? My truck is basically stock in performance and I drive normal.

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