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3.5 Ecoboost with 3.31 or 3.55 rear axle?
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<blockquote data-quote="Up Y'oars" data-source="post: 289851" data-attributes="member: 764"><p>I sold my F150 back in August and it had the 3.31 rear end. MANY of the comments on the Ford F150 forum showed that the 3.55 rear end was faring better than the 3.31. I didn't like the rear end and while it pulled my fiberglass boat just fine it had zero advantage with gas mileage. I'd think the mpg's might improve some while pulling a trailer with the lower geared ratios <em>as long as you're driving conditions are normal</em> (wind, snow, heavy foot, etc.).</p></blockquote><p></p>
[QUOTE="Up Y'oars, post: 289851, member: 764"] I sold my F150 back in August and it had the 3.31 rear end. MANY of the comments on the Ford F150 forum showed that the 3.55 rear end was faring better than the 3.31. I didn't like the rear end and while it pulled my fiberglass boat just fine it had zero advantage with gas mileage. I'd think the mpg's might improve some while pulling a trailer with the lower geared ratios [I]as long as you're driving conditions are normal[/I] (wind, snow, heavy foot, etc.). [/QUOTE]
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