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Im thinking about buying a 2008 4500 with the 4:44 ratio. It seems to be the only way they will sell them right now. If anyone has one can you tell me what kind of mileage your getting with this combo. My 2007 3500 with 4:10 was getting 15mpg hand calc. with a 12 flat bed. Any input would be greatly appreaciated.
 

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i don't know about the mileage on a 4500 but , on a truck that big with that low of rear end , i think you're way past worrying about fuel mileage .
 

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With mp8 hwy 14.7 - 16.8 @ 68 better at 62 but never gets driven that speed much. The city with mp8 11.7 - 12.5. Towing with 30' enclosed with a combined weight 25677, pulling with mp8 with 65 average 10.8 - 11.9 depends on head wind.
 
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