Swapping out 4.10 rear to 4.30 rear - Ford Powerstroke Diesel Forum
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Old 12-30-2010, 06:54 PM
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Swapping out 4.10 rear to 4.30 rear

I am new to snowbirding with a 2005 F350 4x2 dually with 6.0 and a 4.10 rear with a rather large toy hauler. After loading up and checking weight I am a little over on GCVWR. After checking on Ford's 2005 towing guide I should be ok if I change out my rear to a 4.30 with my tow boss. Is there anything else I need to do other than change those gears? Can anyone recommend a resonable place to get it done in Arizona in Jan or Feb 2011?
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Old 12-31-2010, 12:34 PM
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No gear change will make you legal..and a 4.5% change in gearing isn't really going to help towing IMO..I'd get a SCT with custom tunes..would help more.
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Old 12-31-2010, 03:43 PM
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You should be fine with your current setup.

IMHO you should have gauges in your truck since you will be towing. EOT, ECT, EGT and FP are a must
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