im thinking that stock should be the strongest, but not sure on that. my theory on this is that toyota has a more rigorous quality check system than any of the after market suppliers. ive heard that most of the gears that the aftermarket suppliers sell wont pass the OEM specifications. and ive also heard that there are only a few manufacturers for gears and many more suppliers that will stamp a name on them.
sort of like a grade A will be sent to Toyota and a grade B will be sent to Yukon and each will stamp their respective names on them.
but this is all hearsay, but if you think about it, it kinda makes sense.
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