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Power Strokes
6.7 Aftermarket
3.73 and 4.10 gearing Q&A
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[QUOTE="RedRice589, post: 1241413, member: 9515"] I have to agree my truck spends the majority of it's time hooked up and it's to 8-18k and I hated the 35'" toyos and 3.55s on stock turbo, when I swapped to a 15 turbo it was better but the motor was always lugging mileage was still poor. Now with 4.30s and tiny little stock tires on my 15 dually which is bone stock I get the same 10mpg running the same speed as my 12. Personally I felt I needed to do a gear swap as my 6.4 srw 350 had 4.10s and a 35" tire as well it was much nicer. But if I wasn't towing it never would come up. Truck drove great but it's the little thing you notice when you watch small variables change. Like stock tires to 35" mts, not deleted to deleted, then a 15 turbo then an intake all of it changed and contributed to the rise and fall. [/QUOTE]
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