Undeniably. And in the case of these transmissions, it absolutely helps to explain why some would fail instantaneously while others make it several thousand miles before failure. The fit just isn’t the same across the board. A little time and a little wear, and boom. It’s easy to see in that video that the snap ring itself is very easy to remove, so a small amount of variation in tolerance could have a significant effect on how well it does it’s job. I wish I had concrete information to supply as proof but all we’re running on right now is hypotheticals. Science-based and experience-backed, but still hypotheticals. A little transparency from on high would help to put this matter to bed, but the powers that be seem very adamant about keeping their mouths shut. Without some sort of intervention on a higher level, I fear these failures will continue for quite a while until all the bad ones have a chance to hit the road."Tolerance Stacking" can certainly cause lots of issues. I've traded "parts" before because of it.