Throwout Bearing or Input Shaft Bearing? How can you tell which one?

[Losiracer2]

I'm getting this pretty noticeable noise when I have the clutch OUT but not when I'm pushing IN on the clutch. I'm thinking TO bearing since that seems most common.

The kit I've got on there is the Exedy Stage 1 Clutch kit w/ the supplied KOYO bearing. It's been a little over a year/20,000 miles since I did my 5 speed swap. And Just over 10k since I put my M2B4 tranny in. Makes a cluck cluck cluck noise and I can hear something faintly rubbing when I let the clutch OUT. Sounds kinda like a Jetta TDI.

Can anything break if I keep driving on it? Or do I have to get it replaced now?

Here's the Video of the sound (click picture):

[Losiracer2]

I took a Video of it, well 2, I'll post the better one hopefully someone can diagnose it. I think its the TO bearing but not sure if its the Input shaft or not.

[Cblove]

From what I've read, a input shaft bearing only makes noise when the clutch is out, and the throwout bearing makes noise all the time. And it makes a screetching sound vs. a rattling sound in with the input shaft bearing.

Edit: I just watched your video, and my car is making that exact same noise, and like I said, I read it was the input shaft bearing.

[Losiracer2]

From what I've read, a input shaft bearing only makes noise when the clutch is out, and the throwout bearing makes noise all the time. And it makes a screetching sound vs. a rattling sound in with the input shaft bearing.

posted that video right as you posted this...so it sounds like input shaft?

[Cblove]

yea thats what I've been reading everywhere.

Like here: http://www.honda-tech.com/showthread.php?t=2467761

And it makes it while in neutral right?

[Losiracer2]

yea thats what I've been reading everywhere.

Like here: http://www.honda-tech.com/showthread.php?t=2467761

And it makes it while in neutral right?

Yeah i'm kinda leaning towards it being the input shaft bearing now that I've seen videos of it and its symptoms...kinda matches mine.

And I did that video all in neutral. I don't notice the chatter when in gear since my exhaust and RPMs drown it out but I'm sure it does it for a short bit when starting in each gear. But I do notice a kinda gritty? feeling when pushing the clutch into and out of gear changes. Is that the input shaft bearing causing that noise? Its very slight...I can only hear it when the radio/AC are off.

How hard is it to take apart the tranny and do this? Nothing's going to spring out and fly everywhere is it? I have a hoist and air tools, is it simply a matter of unbolting the tranny from the engine removing the old and replacing the new? Or should I pay my mechanic 200 to do this for me?

[evil_demon_01]

Either way you'll have to pull the box to fix the problem.
My guess is its the TO bearing.
When I fitted my Exedy clutch I also used the supplied Koyo bearing.

It was noisy within a few months of use.
When I had to replace my gearbox, I fitted a Honda bearing (which I'm sure is also Koyo iirc) and havn't had a problem since.

[Losiracer2]

Either way you'll have to pull the box to fix the problem.
My guess is its the TO bearing.
When I fitted my Exedy clutch I also used the supplied Koyo bearing.

It was noisy within a few months of use.
When I had to replace my gearbox, I fitted a Honda bearing (which I'm sure is also Koyo iirc) and havn't had a problem since.

So when it makes noise when the pedal is NOT depressed its the TO bearing and not the ISB? If so, then I could do the TO bearing. The ISB I'd actually have to disassemble the trans. which is A lot more work that I'd rather pay someone to do...within reasonable limits I guess.

Oh and just to clear things up if there's any confusion, when I say OUT, I'm off the pedal, when I say IN, i'm depressing the pedal.

[evil_demon_01]

So when it makes noise when the pedal is NOT depressed its the TO bearing and not the ISB? If so, then I could do the TO bearing. The ISB I'd actually have to disassemble the trans. which is A lot more work that I'd rather pay someone to do...within reasonable limits I guess.

Oh and just to clear things up if there's any confusion, when I say OUT, I'm off the pedal, when I say IN, i'm depressing the pedal.

If it's making a noise when the clutch is out it could be either bearing.
Pushing the clutch in puts load on the TO bearing which makes the noise disappear.
Pushing the clutch in disengages the input shaft which means the ISB isn't turning.


You will only know which one it is when you pull the box, by feeling which bearing is rough.

[Losiracer2]

If it's making a noise when the clutch is out it could be either bearing.
Pushing the clutch in puts load on the TO bearing which makes the noise disappear.
Pushing the clutch in disengages the input shaft which means the ISB isn't turning.


You will only know which one it is when you pull the box, by feeling which bearing is rough.

Ok so if it were to be the ISB, you think a someone who's never taken a transmission apart should attempt it? I think I'm pretty mechanically inclined, I've done a head gasket, Timing belt, rack and pinion. Do you just need to be organized and everything will be fine? or are specialized tools required for the ISB job?

[evil_demon_01]

Ok so if it were to be the ISB, you think a someone who's never taken a transmission apart should attempt it? I think I'm pretty mechanically inclined, I've done a head gasket, Timing belt, rack and pinion. Do you just need to be organized and everything will be fine? or are specialized tools required for the ISB job?

Just take it apart in an organized order, Don't disassemble the shafts (pull them out together as one peice) and have a manual on hand.

The only specialized tools you should need is snap ring pliers to get the end housing bearing out, and a bearing puller to get the ISB out.

[wed3k]

pretty brave to try and put one back together. ive only taken them apart, lol.

[Cblove]

From some of the sounds made by other cars on youtube videos, our cars don't sound that bad really...

How loud does it get when you drive? Mine only really makes a noise in low RPMs. And it's not really loud, and pretty much goes away after 2800. Do you have the same symtoms?

[Losiracer2]

From some of the sounds made by other cars on youtube videos, our cars don't sound that bad really...

How loud does it get when you drive? Mine only really makes a noise in low RPMs. And it's not really loud, and pretty much goes away after 2800. Do you have the same symtoms?

yeah i really only hear it when i'm stopped in neutral. Heard it the other night in the drive thru. Don't hear it at all when i'm driving. I was worried though since I've seen the aftermath of not replacing the bearings when you do hear them go bad.

[evil_demon_01]

pretty brave to try and put one back together. ive only taken them apart, lol.

They aren't that hard to do.
The fact that they are only 2 shaft (plus reverse) makes it easier than an auto.