Originally Posted by swampjeep
unless there was something wrong with the engine, I would bet the 2 had different gearing, and or tire sizes.
They actually used the exact same tires/rims. When he got rid of the one, he put the rims and tires on the other. He had the truck checked out, and the mechanics all said is was just fine. Axle gearing was the same. That motor just didn't like to pull.