I have a MF 2135 industrial with the following issue. Shifting into all forward gears appears to work okay. Shifting from 1st to reverse is not working. Through the fluid filler hole I can use a screwdriver to move the visible gear backward into reverse and it works as expected. When I shift from reverse to first everything seems fine and I can see the the gear move forward. When I shift back to reverse the gear does not move and I have to move it manually with the screwdriver to get in back into reverse.