Is anyone here familiar with the electric/air operated autoshift system for the three speed transmission? It has a monotrol and electric range shifter. The controller has been bypassed and is running through the bypass connector. I am suspecting the shifter as well as the air solenoids. In 1 it won't move, in all other gear selections it is in second I think, maybe third.
I am trying to understand how the system works and I have a couple of questions. Is the shifter supposed to feed power to either the first or the second gear solenoids one at a time or does it engage both solenoids in first? This one powers both solenoids in first and then the cylinder doesn't move the spool far enough to engage first. If I only engage first gear solenoid (leave second disconnected) then low works. Same thing if I only engage second then I have second and it seems like it defaults to third if neither solenoid is powered.
I also have a question/ problem with the air solenoids. There is a little petcock on the side of the air solenoids. If it is open, then the air spool will shift as I described above. If I close the petcock (it was closed initially) the air cylinder doesn't shift, solenoids just click. Seems like air can't exhaust. Does it sound like a something is plugged in the air solenoids? If so, could that be causing the shifter issue above that I thought was electrical or do I have two problems? Any help is appreciated.