The reason you don't see manual hubs anymore is because everybody wants shift on the fly 4wd. You can't have shift on the fly 4wd with manual hubs.


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Just from my experience. Back in college a friend and I had nearly identical trucks except his had auto hubs and an extended cab, and open bed with tailgate net and I had manual hubs, standard cab, and cap. I routinely got two to three miles per gallon more than he did. Totally unscientific test, though.


Auto hubs and manual hubs do the same thing...they both unlock when in 2wd, it's just that with auto hubs you have to backup 20 feet to unlock them. Maybe you're talking about ADD (90 and newer)?

Steve
My Website ||Gettin' off 4wheel drive club member
'93 4Runner V6 4x4 auto tranny
If you have to ask about a SAS, you're not ready for it.