I have a 641 Workmaster with a Sherman Hi/Lo in it. Somehow before I bought it, somebody got the Sherman shifter out of the gate, fork or something like that inside. It is in direct drive which makes the tractor useable, but I would like to fix it. Probably split the tractor this weekend and pull the Sherman out. The shifter moves back and forth a little bit, but it is in the inside position and I can't pull it out to where it should be in the direct drive position. I think I may know what happened, but was wondering if anyone knows of someone who overhauls them, or has parts to fix Shermans. Thank you for any help or replies.