Join Date: Aug 2007
Location: Ruidoso N.M.
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I am planning to go with 4.56's. As soon as I wear out my 35's I will be replacing them with 37's and all the research I have done only shows a 100 rpm difference between 4.30's and 4.56's. So I would recommend 4.56's with 38's especially if you plan to tow. I have also decided to get my setup from randys ring and pinon, they seem to be very knowledgeable and prices seem to be good also.
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2004 F-250 lariat 4x4
SCT, Innovative tunes!
AFE intake, Banks 4" turbo back
Fass fuel system,
RCD EGR delete
High idle, Fog, Zoodad mod
Modified Fuel Banjo Bolts,
Boost, EGT, Trans Temp, gauges
2" front leveling kit
3" blocks that replaced stock in the back
Firestone airbags with on board compressor
Bushwacker cut out Flares,16.5x9.75 wheels, with 37/12.50-16.5 Goodyear Wrangler MT's
Yukon 4.56 gears with Lockright Locker in the front