.... uhh ...... ahem ...........
.
the soccer moms are NOT going to like this talk about manual hubs ............ nuh uh .............
.
then again, you could have a system like my Explorer - also designed by Borg Warner .......... similar in some ways ......
it has an 'auto' 4wd setting ......... when the rear tires begin to spin, power is transmitted to the front end ......... and there is a BOOM ! when the hubs lock .......