I am trying to change a water pump on a 1988 88 SPL. To disconnect the shifter shaft you remove the pin and pushed on the rod so it disconnects from the shaft. It seems I an unable to move it enough for it to come apart. The motor is in reverse, pin removed, I press on the bell-crank and it only moves a little before it hits against the block. It only goes in enough so the pin hole is almost flush with the boss that it goes through. I can see it moving in the shifter shaft it just will not slide out. I am about ready for the big hammer. Any advice would be greatly welcomed.