Yes, it's not unusual for the converter to be unlocked in a tow tune at lower speeds with the O/D off. It's not hurting the transmission, although if you like we can restructure the shifts so the converter locks at light throttle and moderate speeds. Just let me know what your ECM code is and we can update the file.
Thanks.
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Bill Cohron - The Mad Doctor  
Power Hungry Performance - The ORIGINAL in Ford performance tuning... Since 1997!
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www.gopowerhungry.com - Home of the Hydra Chip, Minotaur Tuning Software, and the new Orion Reflash System for Navistar!
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