Normal
The way that arm is worn out at the mouth you will never get another seal to fit. You can fill that space but when the yoke rocks up and down it will just tear out what ever fill material you put in there. Unless, you could take it off and weld up that lower worn spot then turn it down on a lathe. We used to do this to prop shafts and axle shafts that would get seal groves in them. We would weld up the grove and then turn it down on a lathe. YOu cans o the same with the yoke, either over-bore it and go with a thicker seal or weld it up and turn it back down.Just remember to keep the grease zerk exposed --and use it often
The way that arm is worn out at the mouth you will never get another seal to fit. You can fill that space but when the yoke rocks up and down it will just tear out what ever fill material you put in there. Unless, you could take it off and weld up that lower worn spot then turn it down on a lathe. We used to do this to prop shafts and axle shafts that would get seal groves in them. We would weld up the grove and then turn it down on a lathe. YOu cans o the same with the yoke, either over-bore it and go with a thicker seal or weld it up and turn it back down.
Just remember to keep the grease zerk exposed --and use it often
