Jack's got it covered there. If you empty or moderately loaded (< 2500 Lbs.) the performance tune is the ideal setting. If your pulling heavier loads or mild loads through rough grades, the towing would be a better fit. Let me know if you need a more in-depth explanation.
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!
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