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| 1997 to 2003 F-150 4.2L, 4.6L, and 5.4L equipped F-150s. |
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#18
Tue, October 6th, 2009, 01:59 PM
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The gear change with no tire size difference equates to a 21% difference.
I've attached a really neat calculator that will take tire size, rear gear ratio and transmission ratios to provide an RPM per MPH value for each gear. Hopefully it's useful. Take care.
__________________
Bill Cohron - The Mad Doctor   Power Hungry Performance - The ORIGINAL in Ford performance tuning... Since 1997! (678) 890-1110 www.gopowerhungry.com - Home of the Hydra Chip, Minotaur Tuning Software, and the new Orion Reflash System for Navistar! Bring back  Windows™ XP and 7.  Windows™ Vista and Windows™ 8 is a pain in my a$$!  Windows™ 10 is only slightly less annoying!  Windows™ 11 is garbage!  Much to my surprise, I'm actually quite enjoying Linux! 
Last edited by Power Hungry; Wed, October 21st, 2009 at 12:25 AM. 
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