Quote:
Originally Posted by 16ACE27
Because the transfer case is not designed to have a 60+ mph difference in speed between the front and rear driveshafts.
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Certainly true with my Jeep... 4 up or 4 down are the options... and in general what I have seen for 4WD.
Motorhome’s guide seems to read as 4 down for F150, but the owners manual is final say - without aftermarket changes.