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That's nasty!

I think there is perhaps an inherent problem is using elastomers in such environments. The whole thing can and will get quite hot, and elastomers are not famous for their temperature resistance. On top of that, if the components are cast rubber or urethane and so on, there might be QA/QC problems with bubbles or voids in the material that could critically change their performance. They might just tear apart after being squished (presuming that any elastomers are used in compression rather than tension, I'm thinking that you squeeze one with a void in it and it tears the wall of the void to the outer edge of block, then the next time it extends or otherwise twists, it just gives up).

This is all purely hypothetical, but it makes me wonder if the things that they have put into it to make it nice to use/live with are perhaps going to cause occasional failures like this.

I wouldn't be getting up in arms over it, unless there are many repeats. I have personally ruined an Xtreme clutch - just an HD thing. I can't remember if it was still behind the 20 or was after the 25 went in. But it inverted some of the retaining spring/clip things around the outside. No-one could explain it. It wasn't thrashed, there wasn't heaps of torque being put through it, and there were no obvious problems other than the above. They were quite concerned by the event so they replaced it even though it was a few years old, which was very nice of them.

As far as I am concerned, these things happen with clutches.

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