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Old 08-19-2012, 10:15 AM   #1
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2012 27' FB International
sebastopol , California
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rear axle ratios

Any suggestions on the following rear axel options, on a 2011 F250 diesel crew cab 4x4? The one that comes with the truck I'm looking at is the 3.55. What would be the optimum for fuel economy?
Thanks

3.31 Axle Ratio Electronic Locking Rear Differential
3.55 Axle Ratio Electronic Locking Rear Differential
3.73 Axle Ratio Electronic Locking Rear Differential
4.30 Axle Ratio Electronic Locking Rear Differential
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Old 08-19-2012, 11:48 AM   #2
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A 250 diesel is going to be used to haul or tow something. What is it, how often and over what terrain?
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Old 08-19-2012, 12:08 PM   #3
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It would be pulling a 27' AS International.
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Old 08-19-2012, 12:27 PM   #4
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3.55 works fine for us. Truck pulls with no strain whatsoever.
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