Ball joint brand, part number ? Could be a wrong part in the right box, too. Sounds like too much preload, or could just be a really rotten part.
Grease fittings, too ?
I always try to use a known brand of ball joints - hard to find USA made anymore, but somebody has got to be manufacturing them nowadays. (I'm lucky to have purchased both GM NOS and TRW joints years ago, I'd better start looking myself).
Regards,
Steve