Here is what I offered as a comment to Howard:
It is very unlikely the engine over-revved as the computer will automatically up-shift the transmission at red line in order to save the engine. Sounds like total B.S. from the Ford mechanic. The tow-haul function works most effectively at 3,000 RPM and up. More likely you had an injector stick open, hydraulic lock a cylinder, and things went downhill quickly. It is a common problem with the 6.0L. But you won't know for sure until someone takes it apart.
It doesn't matter which brand you have, the new diesels are too sophisticated and too expensive to repair to *NOT* have a warranty in place.
Do your self a favor, if you buy another truck, do *NOT* buy a 6.0L Ford. There are just too many failures with that engine. I had three engine failures before Ford replaced it with the newer 6.4L truck.
I can not stress strongly enough the need for an extended warranty if you have a 6.0L Ford engine!!!
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Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB
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