UniClutch

[GTSBoy]

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.

[r32-25t]

Kept saying it’s a flawed design and everyone told me I didn’t know what I was talking about 

[RB335]

You'd think they'd test it on a few high HP cars for a decent time before releasing, unless it is simply a one off or faulty clutches.  Guess time will tell.

[Dose Pipe Sutututu]

Does it pass the pub test? 

Yeah nah.

[Danrb26]

Any further updates on experiences with them? Anyone installed one with a getrag here as yet?

[Butters]

Kinda glad I never got to this .. 

 

https://www.facebook.com/groups/1483859159195077

[GTSBoy]

Cliff's for those of us who refuse to even click a bookface link?

[Butters]

Group dedicated to people who have had failures and poor outcomes.  Good dozen posts so far. 

 

Probably the worst two examples 

 

And this one apparently damaged a sequential and engine block(40k+ damage)

[Dose Pipe Sutututu]

Wild....

Big players in the industry pushing it too.

[GTSBoy]

garsh

[MBS206]

Not yet quite as bad as what we've seen a Jim Berry clutch do in an R32 GTR though when it decided to cut a chassis rail in half...

Still very very gnarly and a great reason to avoid.

[Butters]

Well they got my money but they are not getting my gearbox ! 

[Dose Pipe Sutututu]

11 hours ago, MBS206 said:

Jim Berry

there's a name I haven't heard in a while!

Some of those old photos on SAU and NS were amazing

[niZmO_Man]

That is horrid.

Reminds me of the time that R32 send the clutch through the bonnet, then the guy tried to sell his car using those pictures.

[Murray_Calavera]

On 27/08/2025 at 9:37 PM, MBS206 said:

Jim Berry

I'm getting PTSD flashbacks seeing that name again. 

With my turbo swift, I got 1,500km of street use on a Jim Berry clutch before it exploded and took out my input shaft with it. 

[MBS206]

13 hours ago, niZmO_Man said:

That is horrid.

Reminds me of the time that R32 send the clutch through the bonnet, then the guy tried to sell his car using those pictures.

Are you thinking of Bens R32? I don't remember if his went through the bonnet itself, but it went through the chassis rail.

Brad (RISKIN) bought it, and turned it into a track car.

4 hours ago, Murray_Calavera said:

I'm getting PTSD flashbacks seeing that name again. 

With my turbo swift, I got 1,500km of street use on a Jim Berry clutch before it exploded and took out my input shaft with it. 

It's funny how anti people are of Jim Berry now. I remember when I pulled mine out (during an engine change) and inspected it and found it cracking badly. At that point in time so many people were even on SAU, were so pro Jim Berry, and that was after Bens GTR exploded his quite publically.

[Piggaz]

Not to mention they drive like a bucket of bolts!

yuck!

[joshuaho96]

All of this is making it seem clear that running the Coppermix twin was definitely the way to go, especially in hindsight with how insane tariffs have gotten and the strength of the USD vs yen at the time.