uca bolts

I always grease those bolts. They’re not a press fit or anything, the bushing insert rides on those bolts and that’s metal on metal. When everything is tight the motion of the UCA should just be up to the flex in the bushing and not the bushing spinning on the bolt. But the UCA bolts don’t get as high a torque spec as the LCA pivot pin and they’re not a press fit, so you’re probably getting movement between the bushing and bolt.

And “very tight” doesn’t mean much. That could be a higher or lower torque than the spec, and either can cause problems.