Something sounds wrong here..."even with the hubs locked." If you have manual-locking hubs and they AREN'T locked, it doesn't matter whether the transfer case is in 4WD or not...you are in 2WD.
The Ford and Toyota have identical 4WD systems (when the hubs are locked), but your Toyota probably has LS. That was an option on the Ford...how come you didn't get it?
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Ford will be owned by Toyota soon.........