If you have the auto hubs and they are working correctly, driveshaft
rotation will be limited by the action of the front hubs. The hubs engage
when the axle is turning faster than the wheel - direction matters not.....
If the front wheels are stationary and you turn the front driveshaft, the
hubs will engage and give the impression that the t-case hasn't disengaged.

Conversely, we can rotate the wheel freely either way.. again, direction
doesn't matter since the wheel is spinning faster than the stationary shaft.
The concept may be difficult for some to grasp but it does work....

If you disassemble your t-case shift motor (or better, a donor we can screw
up on), you'll notice three or four (CRS disease) brass arcs on a board. The
4WD module understands the position of the shift forks from the
juxtaposition of these arcs - some are making contact and some aren't. The
principal is quite simple though it appears complicated without a real good
stare and some concentration.


"Professor3700" > wrote in message
lkaboutautos.com...
> Thank you Jim. Still a little puzzled because I removed the [electric]
> motor and rotated the shift shaft manually. Between 4H and 4L the front
> drive shaft never disengaged. Unfortunately I did not have the rear
> wheels in the air so I couldn't tell for sure that the rear drive shaft
> did not come free.
>
> But you are suggesting that if I had the car in the air and rotated the
> shift shaft manually, I would find the neutral position. If this is true,
> I'm home free because a computer that can find that position is easy for
> me. Lots of ways to do that.
>
> Probably can't put the car in the air before weekend but I'll try then.
>
> Thanks again - I'll keep you posted.
>
>
>