1981 transmission problem
 

I have a 1981 mercedes 300D. I have the following transmission problem. The transmission does not want to shift properly. I have the correct vacuum presure of 15" going to 0" at 2000 rpm. The problem is that the trans sticks in first or passing gear. I have disconnected the electric down shift swirch and no change.
Any help would be helpful.
Thanks, Bill

RE: 1981 transmission problem
 

Check all your vacuum connections. Check the little valves on top of the valve cover. Check your modulator valve. That transmission is a vacuum nightmare. Good luck.

RE: 1981 transmission problem
 

I have replaced all 3 of the vacuuum switches on top the valve cover and the transmission modulator. I feel they are working properly.
I think my problem is in the adjustment rods someplace, but need more info on how to adjust them.