[renovationinnov]

just aquick question / did you check the back lash on the pinion - crown gear & was the 2 lapped matched
because if they where not the hard facing can destroy the crown gear repaidly& if to much backlash can load the pinion bearings causing them to spin in there housing
reason i know this a diff mob reconed a diff for me & didn't lap it in , so i had a similar sounding problem
hope this helps