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could swear I read that longer wheel base vehicles do not suffer as much rear steer effects with auto lockers like Detroit's. Guess that makes a little since cause the travel of inside rear wheel in a turn, rotates a lot compared to a short wheel base where the inside tire rotates much less...

... OK if I understand all this right..... When it comes to lockers... Mode ONLY "directly" affects the locker inside the Power Divider on MTV 6x6 trucks. In Mode it kicks on an ARB type locker in the Power Dividers differential locking the two rear axles together so they both are powered...

you might be right... though feel it may be more than that. The lock of the power divider.... that locks the two axles together..... IS essentially a locker.... works basically like an ARB... but it locks a differential that sits between two axles instead of a differential between two wheels...

so sounds like everyone is basically "sorta" correct, "in general" cause in most normal situations; when NOT in mode, sounds like the power tends to stay in the middle axle cause it is (sorta) powered first.... and thus slips first... keeping the % power there the most. Which in effect leaves...

Will see what I can do . It is nailed up in a crate.

Devils advocate, just throwing this out there..... that is like saying a "Heavy truck mechanic, an Automotive engineer or say a Dakar truck builder.. should offer no thoughts"..... "if they don't own an FMTV"? when get a chance will try to put a socket drive to my 6x6 axle and see what the...

Well that is where the conflict is. Seems some have come to the thought you describe above of rear most is a floating Tag axle till put in mode and activating it. Yet others have pointed out that it looks like there is a normal differential in the Power Divider thus that school of thought would...

from what Scottmandu reported seems middle is best, but only marginally. Seems to me... and am no engineer.... Based on that there is a differential that sends torque to both axles... but mostly to the one that has some slip... any axle in the 6x6 pair with Detroit in it will get sent...

middle axle not engaged sounds right cause the Power Dividers differential would send all torque to the spinning axle and not having a driveshaft there it would sense that the rear most axle was spinning like crazy. Thus no torque sent to middle axle and all of it to the crazy spinning one...

Sentence could be read different ways. So for clarity; are you saying it would spin while sitting going nowhere ..... or that it would spin while it was under tow? (In Neutral)

34 thru 36 appears to be the air piston that activates fork #41 which somehow along with 40 and 39 locks up 38... aka the interaxle locker

ahhh.... so there is NOT a differential inside the power divider?

well??? for clarity since you folk hear know loads more than I do... if it is in rear most is it not more semi-selectable than a true selectable? As in; when NOT in off road mode doesn't the differential inside the power divider have both rear axles available but sends torque to which ever has...

never mind. already answered