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Q:

My truck is not shifting correctly on 2003 Ford F-350 Super Duty

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Truck won't downshift into low range or up shift into high range. Tow/Haul switch is flashing on and off
(1) Answer
Yikes! you might have a problem with the transmission