Thanks, tclederman,

They're galled where the ball bearings ride on the axle. Deep groove at both the front and rear bearing. Ugly. Plus it looks like the bearing may have walked (somehow) onto the axle threads neatly destroying the three inboard (closest to the kingpin) threads. The bushings look tight in the knuckle (at least I can't move them) but the pin is loose in the bushing so I guess a new bushing would fix it (except for the galling issue!)

good point on the oversize kingpin. I'll mic it tomorrow to see if it's bigger than .866

thanks!