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I need some advise. So I'm purchasing a 40 foot fifth wheel to full time living and rving. My truck is a 2006 F350 4x4 with about 450-550 HP and a 5R110 transmission. I'm going to be 75% daily driver and 25% towing. I'm not sure which gear ratio I should go with. I've talked with my dad and others I know and trust, but can't get clear direction or sound advise. So I thought I'd turn to you, The Powerstroke Nation for a non bias and expert advise. Which ratio would be the best all around the 4:11 or the 3:73? :unsure:
 

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3.73 is 2k rpm at interstate speeds with normal tires

Id go with what the truck has, if I was picking 3.73

Don't tow at that tune, make sure you have a tow tune
 
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