I have a 1946 2n and i found out that the shift inter lock PT# 9N7229B is broken. the tractor still works and runs but some times its hard to start. Looking to get another one but cant find one cheep. Roberts has one for $85.00. All tho it seams to be the only one out there this might be my best bet. looking to see if anybody has one cheaper. I don't have it out at the moment and was thinking of welding it but if i can find one in one piece.