Quote:
Originally Posted by 1/2tired
If you check th eOwners Manual, it will tell you to tow with the Overdrive OFF...
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No, it doesn't. In fact, your 2008 doesn't even have a button to turn the overdrive off. And neither does the 6.0L with TorqShift tranny. The TorqShift tranny does have a tow/haul mode you should shift into when towing up or down steep grades, but it does
not turn off the overdrive. Here's what the 2003 Owner's Guide says about towing with the TorqShift tranny:
Quote:
Driving while you tow
When towing a trailer:
•...
• If your vehicle is equipped with a 5–speed automatic
transmission: To eliminate excessive transmission shifting, activate
the Tow/Haul feature. This will also assist in transmission cooling. ...
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That's it. Not a peep about turning off the overdrive.
The '99-'03 7.3L does have an overdrive-off button, but the 7.3L Owner's Guide says only:
"Use a lower gear when towing up or down steep hills. This will eliminate excesssive downshifting and upshifting for optimum fuel economy and transmission cooling."
And in another place not associated with towing, it says:
"Automatic transmissions may shift frequently while driving up steep grades. Eliminate frequent shifting by shifting out of overdrive into a lower gear."
If you'll notice, that's basically what I posted near the beginning of this thread.
