What type of driving causes rear pillow ball bushings to go bad?
 

Has anybody given any thought (taking the suspension geometry in the rear into account) as to what types of forces cause undue stress on the rear pillow bushings. Is it accelerated simply by bumps in the road, or is there a more specific type of maneuver to avoid in order to delay their going bad? Its seems I heard the most clunking (before I changed mine) during the final stages of a stop or very beginning of an acceleration, when there is weight transfer between the front/back.

hard/time

Solid spherical bearings are not normally used in street cars due to wear.

They have awesome rigidity and lack of play, but wear out quicker than rubber or poly.

Basically: they will wear, get used to it.

The FD pretty much has a race-car suspension geometry. The bushings wear out. My mechanic has replaced bushings with as little as 2xk miles on them (but several years old).