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am not understanding how this could happen, the ring gear looks like new, yet 4 teeth destroyed on the pinion. 3.90 ration in a rpm built diff. No track days no auto cross. c5 z06 just started with a nasty vibration and had it towed in to the shop. Any thought on this, i m curious what the lads think
Clear evidence of a fatigue crack in the lower tooth, upper tooth failed in overload as a result. Look for a "beach" pattern ( ever expanding discolorations) to indicate a fatigue failure in the lower tooth. Probably a flaw in the lower tooth-- slight crack or stress riser where the "beach" pattern started.
Early hot rodders polished connecting rods to eliminate surface imperfections that might constitute stress risers that would precipitate a beginning crack and ultimate fatigue failure.
thoughts on this
