Quote:
Originally Posted by 88Racing
Now if towing really heavy loads its recommend to turn off the od and essentially that turns the lock up off. Thus allowing for more fluid to cool.
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That is an incorrect statement.
Towing with the OD off allows the tranny TO lock up the TC so that it does in fact run cooler. Towing with the OD on, (in most cases), will have the truck running in 4th gear with the TC unlocked and causing a large amount of unwanted heat.