So, I changed these bearings on my 98 EDM ITR:

1) The throwout bearing in the clutch

2) 3 bearings in the tranny (both mainshaft and one countershaft bearing):



The exact same noise is still present

Today I recorded the sound from the driver's seat. The car is stopped, stick in neutral and engine revved at about 3000RPM. I periodically push and release the clutch pedal, notice the noise when the clutch pedal is released:
http://www.volny.cz/veitel/itr/tranny/noise.mp3

The noise is present:

1) In the case above - stopped and clutch pedal relased. When I push the clutch pedal, the noise immediatelly stops (as you can hear in the MP3). The noise goes on/off about 1-2inches pedal height from the floor. Just touching the pedal doesn't make the noise stop.

2) When I drive and accelerate, the sound is most noticable from 1500 to about 3500RPM in any gear.

3) When I drive and decelerate (with some gear and off throttle pedal, just braking with my engine), the sound is noticable only from 2000 to about 3000RPM in any gear.

4) When I drive in any gear and pulsate with the throttle pedal, the noise changes a bit, you can hear it from 1000 to about 5000RPM (in higher speeds the engine is too loud).

What the hell could this be?????? Could the clutch plate itself make this noise? IMO, when stopped and just revving with clutch pedal released, only the mainshaft is rotating. I replaced both the beaings and this doesn't help .

Thank you for your help!

 

not sure
but, could it not be the flywheel? and when you engage the clutch it disengages everything stopping the noise?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IVI &raquo;</TD></TR><TR><TD CLASS="quote">not sure
but, could it not be the flywheel? and when you engage the clutch it disengages everything stopping the noise?
</TD></TR></TABLE>
When I push the clutch pedal, the noise immediatelly stops. When I release the clutch pedal, the noise is present, like you can hear in the MP3.

 

I don't know but I am having the EXACT same problem on my 99EX tranny. I replaced the input shaft bearing also, but no other bearings, because the ISB was the only one that I THOUGHT was bad. So I second this request for WTF?

 

honestly i dont wanna sound like a dick, but did you put fluid in it? or maybe its the throwout bearing, i have had that happen to me

 

Pilot bearing been changed lately?

 

UPDATE

Today, I used a sthetoscope with some long bar to amplify and listen to the noises.


I found no noises near the clutch area, but I found many noises on the opposite side - near the right wheel, where the mainshaft, coutersahft bearings and the bar sit. There are some "RRRRR" ratling noises, that I tried to record (engine at 3000rpm, staying in neutral and pulsating with the clutch pedal):

Noise recorded outside, about 0.5m from the right side of the tranny: http://www.volny.cz/veitel/itr/tranny/far.mp3

Noise recorded near, about 5cm (2 inch) from the mainshaft bearing: http://www.volny.cz/veitel/itr/tranny/near.mp3. Note that here I push and release the clutch pedal more quickly to show that the noise stops really immediatelly after I push the clutch pedal and comes immediately when I release it.

The "RRRR" noise seems to be all over the right side of the tranny, most noticable in the small area where the longest "bar" sits in the housing. The "RRRR" noise is almost everywhere (the sthetoscope is probably not able to localize it accurate), some other peaks are in the main/countershaft bearings area. There is also some clicking noise where the second "bar" sits in the housing.


It's interesting, because I replaced both the main and countershaft bearings on this side, so I don't know where are the noises coming from.

Anyway, we didn't measure any of the clearences in the tranny when reassemling - could this be a problem? The tranny has 130kkm (85kmiles) on it. From my point of view, it looks like something is loose there, like the housing (cover) was too high and the parts inside are loose.

When I'm at idle (800rpm), I hear only standard "whm" noise in all areas, no rattling. The rattling starts in higher engine speeds. When I rev it, I can hear it even at 6000rpm.

I checked two other D-series trannies with the sthetoscope and both kept the initial "whm" noise that didn't change into any rattling when revved.

 

I talked to someone on a d-series board, since that's what tranny I have that I'm having the same problem with, and I was told it was the bearings. But that doesn't make a lot of sense since you've replaced all of them. Especially if the countershaft does not spin at idle. Do you notice any noise when you're coming to a stop, like from about 10mph to 0mph, can you kind of hear it? Hopefully this can be figured out.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ****** &raquo;</TD></TR><TR><TD CLASS="quote">Do you notice any noise when you're coming to a stop, like from about 10mph to 0mph, can you kind of hear it? Hopefully this can be figured out.</TD></TR></TABLE>
No, the noise is speed independent - if I'm cruising for example 60mph in 5th gear and push/release the clutch pedal, it makes the same noise as if I'm stopped.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by iHave2Cams &raquo;</TD></TR><TR><TD CLASS="quote">honestly i dont wanna sound like a dick, but did you put fluid in it? or maybe its the throwout bearing, i have had that happen to me</TD></TR></TABLE>
Yes, the fluid is in of course. We have changed the yhrowout bearing too

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by D15B7turbo &raquo;</TD></TR><TR><TD CLASS="quote">Pilot bearing been changed lately?</TD></TR></TABLE>
No. I was told that the pilot bearing spins only with a clutch pedal pushed, so this should not be my case (my noise is present only with the pedal released).

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by petrv &raquo;</TD></TR><TR><TD CLASS="quote">No. I was told that the pilot bearing spins only with a clutch pedal pushed, so this should not be my case (my noise is present only with the pedal released).</TD></TR></TABLE>

I believe the pilot bearing spins whenever the mainshaft spins, as the mainshaft 'tip' fits into it at the flywheel.

 

I added more info in this thread https://honda-tech.com/zerothread?id=956991&page=2 to be simple and on one place.

It would be nice if you could co-operate and help to solve the problem. It seems that many of us have the same problems.

Thank you,
Petr