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Old 02-19-2010, 07:49 AM
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Gear ratio question

Im wondering what for a gear ratio i should switch my 04 f350 to. im currently running 3:73s and 315/75/16 toyo mts and im putting on a set of 38/13/16 michelin xmls. the truck is a daily driver as well as i use it for work pulling cattle trailer with atleast 10-15000lbs loaded so i need this truck to be able to do this once i swap the tires. also the michelins are almost double the weight as they weigh 115lbs and the toyos are only around 70lbs. any input and advice is much appreciated
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Old 02-19-2010, 09:34 AM
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4.30s or 4.56
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Old 02-19-2010, 10:00 AM
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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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Old 02-19-2010, 10:59 AM
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yah im leaning more towards the 4:56s to make sure i keep my power up im hopeing to find some from a wrecker and swap them or a good place on the internet that might swap.
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