I had this also since new. Tried to fix it but used the incorrect lithium based grease. Just didi it again using the correct grease and it drives better than it ever has..
I used the wrong grease the first time.. After using the correct grease my stop bump is completely gone. Amazing Ford could not get this right from the factory.
Looks great.. I printed this one and I like the larger diameter of yours.
https://www.thingiverse.com/thing:4876148
Are your STL's going to be available?
Dang.. Reminds me of hay wrapping on drive shafts on the farm.. That will be a job the pinion will need to be completely removed to replace the seal. The first time I "used my skid plate" was from highway debris.