[Sharps40]

I want to know what year truck and suspension we are working on here cause the replacement ball joint also looks radically different that the one it replaced. It sure don't look like NO 64 to 66 upper ball Joint I've ever seen.

OP, can you tell us what year/model is your truck?

Also, what make and part numbers are you using...I'm beginning to wonder what parts you are using there....

From your very first picture, the old shaft seals and old upper ball joint appear to be 64 to 66 oem size and shapes.

Your replacement seals and replacement upper ball joint look like nothing I've ever seen for a 64 to 66.