10-06-2020, 09:09 PM
It is true the pinion ball races did not last forever and were later dropped. Roller races also facilitate mesh checking. But bearing ratings (reputable brands!) are much increased since the 1930s and a ball race less expensive. Few cars are going to do another 100,000. For those with lathes and adept at use of fitting a precision concentric sleeve finished within .0002 is not difficult, but it is for many.