"This repair is not covered by Subaru's limited warranty" RE: 4th gear tranny grind

[sierra]

Originally Posted by Amir Ghadiri

The clutch mod wouldn't affect these problems. My clutch damage was caused by the transmission grind, moreover by the clutch bouncing off the flywheel when the transmission grinds mid shift. This is what caused the spring failure, causing the clutch to self destruct (for lack of a better word). The picture I posted didn't show it well, but one of the 4 springs in the clutch assembly failed and caused this pressure plate to come apart. This is also what caused the discoloration. For what it's worth, my car did not have the clutch mod.

That makes no sense.
The clutch would have been fully disengaged with big clearance from the flywheel, surely?

[Poodles]

Originally Posted by Amir Ghadiri

Not quite. When a transmission is out of synchronization, it will cause clutch chatter. Clutch chatter, in short terms, is the clutch bouncing on and off the flywheel, repeatedly grabbing and releasing it until the clutch finally engages. Clutch chatter causes springs to fail, which in turn causes clutches to detonate.

It's crazy to think that all of this could be caused by a prematurely worn synchroid, but chances are it was.

This would only be true if the clutch disk wasn't floating on the splines, which it does. If it didn't float, that could the issue.


You either have clearance or you don't in the system, nothing the transmission does is going to affect the clutch in this way.

[DoomsdayJesus]

Holy hell, that's not good. Not a very welcome update.

[sprintertrueno86]

Originally Posted by charged86

This is fucking stupid. My fourth always grinds above 4500 regardless of throttle position. My have my tranny rebuilt to fix the faulty syncro. Then I will ejaculate all over the old one and mail that to Subaru of America

this made my day.

[zdr93523]

Originally Posted by infinite012

From your Porsche/Aisin link:


I'd like to see what kind of fluid Aisin is putting into the Porsche 911 transmissions.

I'm pretty sure it is GL-5.

[zdr93523]

Originally Posted by Gen

Mine grinds into 4th unless I am VERY slow and deliberate with my shift (I have to wait for the engine to fall 2-3k RPM). Clutch pedal is at stock height and I'm on the stock clutch. However, I'd be curious as well.

Mine is the same.

[zdr93523]

Update: Subaru is replacing my transmission next week when it comes in. It only took me taking the service manager for a ride, a quick call to the SOA rep by him, and in 30 minutes my transmission was on order. We are going to fill the new one with Motul 300.

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