‘84- Noise when releasing clutch pedal. Throw-out bearing???

[bigo5552000]

Hello Pelicans!

So I have a new ominous sound that has just started. When I release the clutch and right as the clutch engages with the flywheel I hear a rotational grinding sound. That is quite loud! Once the clutch is completely engaged the sound goes away. This only happens when I am in gear. If I’m in neutral there is no sound. I don’t seem to have any clutch slippage or any other symptoms, just the sound. Just to give all the context clues I can. I did recently replace the transmission fluid, but I don’t believe that has anything to do with it.

I am thinking it is the clutch throw out bearing. Thoughts? Ideas? Thanks in advance!!


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[yelcab1]

Good: TO bearing
Bad: Any gear set

There is an engine out job in your near future.

[bigo5552000]

Originally Posted by yelcab1

Good: TO bearing
Bad: Any gear set

There is an engine out job in your near future.

Dang.

How would I diagnose if it is a gear set?


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[yelcab1]

Change the fluid. If there is any chunks of metal bigger than 1mm, it's a gear or gear related.

[bigo5552000]

Originally Posted by yelcab1

Change the fluid. If there is any chunks of metal bigger than 1mm, it's a gear or gear related.

I just changed the fluid. No metal or anything strange to be found.


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[Fab64]

From Peter Zimmermann's book, "The Used 911 Story", page 17:

"If the clutch pedal is depressed slowly and a far away whirring or growling noise begins about three quarters of the way in, odds are very good that the throwout bearing is faulty.

If the clutch pedal is depressed all the way and then released very slowly and a growling noise begins with the pedal about halfway out, the car probably has one or more bad transmission bearings."

He also advises to always obtain an expert's opinion. Good luck.

[yelcab1]

Drop the engine/gearabox. Inspect the TO bearing. If it is not that, then it's inside the box. Prepare for a big bill if that is the case.

[bigo5552000]

Originally Posted by Fab64

From Peter Zimmermann's book, "The Used 911 Story", page 17:

"If the clutch pedal is depressed slowly and a far away whirring or growling noise begins about three quarters of the way in, odds are very good that the throwout bearing is faulty.

If the clutch pedal is depressed all the way and then released very slowly and a growling noise begins with the pedal about halfway out, the car probably has one or more bad transmission bearings."

He also advises to always obtain an expert's opinion. Good luck.

Those are much better descriptions then mine! Lol unfortunately it sounds more like the second choice.

I can’t wrap my head around how intermittent it is. I just took it for a 20 minute drive and it didn’t do it at all..




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[bigo5552000]

Originally Posted by yelcab1

Drop the engine/gearabox. Inspect the TO bearing. If it is not that, then it's inside the box. Prepare for a big bill if that is the case.

That’s pretty much my plan…


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[bigo5552000]

Update for everyone! I figured out the noise and can’t believe what it was!

A little back story. I was researching clutch parts and transmission parts and I was not very excited to have to pull the engine again.

I decided to drive the car to a local C&C to see if it made the noise. It did make the noise but not only while shifting this time! I then thought heck.. is this something else? When I got to the C&C I started looking hard around the car for things loose or rubbing. Then I saw it…the belt was SUPER loose! I thought no way that the belt is making this noise. It did not sound anything like a belt squeak, but I decided to throw a belt on it and see.

And boom! It fixed it! No sound now. I drove the car ~250 miles this weekend without a hitch and with no weird sounds! I still am in shock that was it but it’s fixed now!

Thanks all for the help!


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[PeteKz]

Thanks for the resolution.