Originally Posted by CLARKEY
Excuse my ignorance ,but what actually is diff backlash.?
Backlash in basically any assembly is the amount of overall movement in one member, ie pinion, before contact (and then movement) occurs in the next member in the system, ie crown wheel. Most 7.5" to 9" crown wheels have between 3 and 14 thou backlash measured at the crown wheel. Not enough, they will whine and suffer damage, particularly when hot. Too much and they will clunk, and suffer excessive wear in on/off applications.