Join Date: Dec 2008
Location: norman, ok
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I think for the gear ratios is: If you are concerned with highway fuel economy then go with the 3.31, If you are mainly doing in town or off road then go with the 3.73
You should already be used to the 3.31 combo with mileage and towing etc, and I dont think you would be hurting too much with going to the 3.73 especially if you have upped a size or two on tires or are planning to.
Overall the 3.73 will give you a slight edge in power, and towing but you will lose a little bit of economy on the highway I doubt you would lose more than 1MPG. You might actually gain a little bit if you do a lot of city or lower speed driving. If it was mine I would go with the 3.73 for sure.
My motto: Be nice, be polite, but have have a plan to kill everyone that you meet.
94 F250 IDI turbo, auto 2wd.. ATS housing, 3" down, 4" exh, guages. 104k miles got totalled by a damn mustang (parts now).
98 12v, 4x4 quad cab. auto with BD T/C & V/B, Banks Big head, Exh brake, AFC modded, 16.5ish*, KDP gone, 60lb springs, 4K-GSK, BHAF, pyro, trans, and boost guages. 4" straight pipe,
72 AM General M35A2, LDT465-1C "Whistler" Turbo, PTO winch.