M936 A2 transfer case problem

[War Time Finds]

My M931A2 trys to kill the running motor if I move my transfer case lever from high to low then put the Allison trans in gear, if I play with the transfer case lever, up and down for a few minutes and then go into reverse, it does' not stall and I can then go forward. It does this several times, killing the motor each time till I get the lever in the correct spot to by pass????. It's like something in the transfer case lever tells the transmission to by pass the torque converter and kills the motor.

 

[Ford Mechanic]

My M931A2 trys to kill the running motor if I move my transfer case lever from high to low then put the Allison trans in gear, if I play with the transfer case lever, up and down for a few minutes and then go into reverse, it does' not stall and I can then go forward. It does this several times, killing the motor each time till I get the lever in the correct spot to by pass????. It's like something in the transfer case lever tells the transmission to by pass the torque converter and kills the motor.

Seems to be normal, mine does this also. Usually it isn't fully in high or low, after the jerk I can get it the rest of the way in. Also lube the small silver button on the end of the high/low lever. It can cause issues or so I'm told if it's not popping out like it should. Just a squirt of oil around the sides and press it in several times.

 

[Csm Davis]

OK guy's here's the thing the transfer case shifter should move easily from high to low easily if it is adjusted and lubricated properly. If you are having trouble shifting it, start looking for a problem.

 

[engineer233]

Unhook the pto linkage at the transfer case pto to see if the pto shift lever will come back down. Sounds like to me the pto is stuck engaged.

 

[Csm Davis]

Unhook the pto linkage at the transfer case pto to see if the pto shift lever will come back down. Sounds like to me the pto is stuck engaged.

Who or which post is this in response to? The hard shifting transfer case is common across the 939 series not just the 936 and is generally because of the interlock switch or piston not functioning properly.