Is this Trunnion correct for a 1340
 

Sirs
At last I have reached the stage of running my 1340. With the rear wheels jacked off the ground the wheels have plenty of forward motion but very little rearwards motion. Looking into it, the transmission control hardly moves the control cam at all in reverse. I have sketches from the Cub Cadet spares pdf which shows the control cam with one hole in the cam for the connecting rod mine has two,one just below the other, and a completely different spring guides and springs in the trunnion. My question is is my trunnion compatible and which hole is the correct one.
See attachment for picture of trunnion