Compression Ignition Addict
Join Date: Dec 2007
Thanked 320 Times in 309 Posts
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Yea but, the "lock" of the Ball Joint isn't relying on the nuts tightness...
The tapered shaft locks into the axle by the action of the taper (as you know from having to use a pickle fork to brake those tapers on all the FE links). From there, the ball & socket of the pivot point of the joint (where the stiffness comes from when they're new) is beyond that nut & taper-lock of the shaft.
Loose or tight, once that nut has engaged the taper, has no effect on that "stiffness", it's all internal to the joint itself and needs to "wear-in" before it goes away.