Well after I did my trans fluid change last week, I was driving my 8N around a bit. As I am driving down the drive, I hear a knocking. I thought, I must of messed up the trans, or the motor wile doing the fluid changes. So I slow down, and the knocking stops. Well I look down, and where the right side radius arm attaches to the tractor, it is real loose. The arm is moving around a lot in the block it mounts to. Should there be a bushing there? If not do I just need to replace those blocks it mounts to? Kinda strange, becouse the left side is tight as could be. Thanls for any help.