Shifting a M939 Transfer case by hand

[M35A2-AZ]

I picked up a take out M939 Transfer case and I am checking it out to
make sure it all works, but I can not shift it in to neutral or low.
It is in high and it turns fine.
I guess my question is can you shift one by hand?

 

[plode]

When I had the linkage off of mine to grease it, I could only shift it by putting a screwdriver through the pin hole and pulling on that.

 

[M35A2-AZ]

When I had the linkage off of mine to grease it, I could only shift it by putting a screwdriver through the pin hole and pulling on that.

I have tried pulling as hard as I can, no go.
Albert

 

[M35A2-AZ]

Well, I tried to shift the transfer case on two over of my trucks by hand and if you bleed the air off you can shift them.

 

[74M35A2]

I haven't read the manual, but I think they prefer if you shift it while the truck is in at least slight motion. Try turning the input shaft while moving the linkage. T case shifting is not one of the 900 series strong suits.....

 

[VPed]

Well, I tried to shift the transfer case on two over of my trucks by hand and if you bleed the air off you can shift them.

Yeah but those have probably moved recently. Maybe the shaft is just a little stuck. Try a little mechanical advantage. Also maybe you should remove the air lock actuator and take a peek in there/shoot in some lube.