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Power Strokes
6.7 Aftermarket
re-gearing for 37's
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[QUOTE="Chris, post: 283417, member: 400"] i had 3.31s and 37s for a few weeks. the truck had the power to pull like that, but the rpms were so low pulling up certain hills it would make the transmission shudder. now this is w/ h&s motor and trans tuning. their transmission tuning lowers the shift points and tc lockup considerably over stock. If they would release maybe a different software w/ some higher shifts for trucks such as these there might not be a necessity for a gear swap. Unfortuneately there are no 4.10 gears for the 11+ trucks. The rear end is different than the 99-10 trucks. i went w/ 4.30s and love the power. the only downfall is the mileage on the highway sucks. at 70mph i cruise at about 2000rpms. ill get about 14.5-15mpg hand calculated in town, but cruising 75-80 on the highway itll do right at 13. with the 4.30s and the really low 1st gear the 6r140 has, itll climp up a big incline by just letting your foot off the brake. [/QUOTE]
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