Im curious if anyone else has seen, or heard of an exedy tripple going bad after maybe 500 miles of driving? Ok, so some of the driving was spirited.. A few racese at 23-25 psi and the clutch seemed to hold the power very well. After some tuning I decided to make a pull at a bit more than that.. Not that 28-29psi hasnt been done before, just in the past I normally didnt have the sticky tires that I do today.

I got on a nice stretch of road, in first and put the fun pedal home.. Boost hit like a sledge hammer some where midband, the car pulled as hard as it always has right up to about 7000 where I felt a hard shift in the power like a rubber band breaking. and then it was free wheeling.. At first I thought my input shaft on the trans broke.

After pulling it apart, it was not.

http://img241.imageshack.us/my.php?image=img0931kj1.jpg
http://img206.imageshack.us/my.php?image=img0936rl2.jpg

All the splines on all three disks are gone.

The splines on the input shaft of the trans is fine, no noticible wear whatso ever, which is a little hard to believe after seeing how the exedy hubs faired.

I have never heard of a bad batch of exedy tripples. Im certain that even if I was making north of 500whp (which Im probably not) this kind of failure mode should not of happened.

I bought the clutch with a project car. It had only dyno time on it when I got it. I installed it, drove it probably less than 500 miles before this occured.
All three of my clutch disks look like the above.

 

well that sucks rather hard but i would have let some more seat time occur before doing some major pulls IMO

 

My first 200 miles (tank of gas) was at 17psi.

 

I don't have a answer unfortunately....sucks is a understatement.

 

Thats why i went back with ACT. My exedy lasted less than 8k or so.


My ACT before that lasted 30k+ @ 500whp

Street Disc too

 

Could have been in install issue.

 

I have the exedy triple for more than 20.000 miles with 550whp.Its impossible to toast this clutch so be sure that something is wrong with the car or with your driving.

 

It would be some super bad driving to kill it that fast I would put money on the timing marks not being lined up on install

 

Had to be a bad install job. Even if you didn't break it in at all it would be hard to toast it this fast imo. Haven't ever tried the Exedy but from what you can read on these forums, there's people launching airplanes off them and they still work after 20k

 

Call exedy and explain the situation to them and they will probably want to look at it.

 

My vote would be improper heat treat process on the hub material. They broke like glass, as if it was brittle.

I would think the botch installs would more reflect abnormal wear/no wear/excessive wear on the clutch disk material, not the inner hub going from splined to smooth.

 

Doop...

That sucks...

-E

 

A few thoughts

1 - I have never seen any Exedy clutch fail in this manner and I have the same unit in my 645 TQ Subaru STI with no problems

2 - Did you consider to contact Exedy or your Exedy Dealer to give them a chance to examine your clutch and rectofy the situation before you post this on the internet?

Al

 

don't think their are many possible scenarios that could have led to this besides the problem being from exedy themselves.

 

Al why he shouldn't post it on the internet. He is just asking if this has happened before to someone else... That's the point of the forum...

Eventhought that the Exedys are known for eating their discs relatively fast, this type of wearing is definitely abnormal...

I am curious if Exedy examines the kit what they will find...