[aronhk_md]

Ok, searches here reveal nothing. Searches on the internet reveal 3 camps....those that supposrt using anti-seize on ball joint tapers, those that are vehemently against it, and those who scratch their heads and wonder.

I'm definitely in the 3rd group. While I understand the 2nd group feels the taper joint is one where the friction of the tapered hole and shaft is important.......I'm not sure from a physics standpoint I agree right off the bat. These people claim the torque on the castle nut is only to keep friction on the two tapered surfaces.

Now, if you look at the forces I personally believe the taper is designed to deal with, it would be lateral motion pressing the shaft sides against the hole sides. for both upper and lower ball joints. Then for upward motion it would be the upper ball joint taking the main stress with the taper pressing up into the shaft taper, and for downward motion the lower ball joint does the same.

I just dont see any motion that would require metal to metal high coefficient of friction in that tapered hole/shaft relationship, but I also dont know from an engineering standpoint whether I have thought of all factors. lol

I understand there are lots of mechanics out there who have done thousands of ball joint replacements, but I have seen certified mechanics state BOTH positions. I'd love to hear what those here have to say. Especially if I could get someone with automotive engineering/design background/racing experience, etc. to chime in.

Thanks in advance