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Originally Posted by NoMoGMPG
The lapping compound would not cause a fracturing of the gear, rather, it would lead to excessive backlash and a howling noise. The catastrophic failure is likely a manufacturing defect and American Axle is going to have alot of 'splainin to do, not to mention compensation to GM for warranty repairs.
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Makes sense, but won't excessive backlash put more strain on the gear teeth? Not an expert in gears, unless they have electricity running through them.
