I have a ls swap in my 94 ex and during idle or when I first take off I hear a rattling. To best describe the sound it sounds like metal to metal contact. Like pennies in a pot lol. It's most noticeable at start up when the car is idling but while driving you can't hear it. While idling if I give it gas the rattling doesn't increase it just disappears. I jacked the car up while it was idling I can hear the sound clearly since I'm missing the flywheel cover. Possible clutch pilot bearing going out?

CLIFFS:
Rattling nose during idle and first take off
Coming from flywheel area when under car
Sounds doesn't increase when accelerating
Bad clutch pilot bearing?

 

It could be alot of things, do you hear it at an idle with the clutch pressed in? or just when its realesed? did you replace the clutch and resurface the flywheel. I know the clutch can chatter on take off if the flywheel is not resurfaced.

 

I hear the noise at idle with car in neutral without the clutch pressed in. Both came with swap so never resurfaced.

 

WHILE IDLE IN NEUTRAL PRESS IN THE CLUTH PEDAL IF U HEAR THE NOISE GO AWAY WHICH U SHOULD AUTOMATICALLY HEAR IT THEN IT'S URE CLUTCH RELEASE BEARING IF NOT COULD BE URE TRANNY (MAIN BEARING)

 

Other way around. If you depress the clutch and you hear noise the release/throwout bearing is bad (this is the only time it turns) if the noise goes away one or more of the 5 bearings in your transmission is bad.

 

WHILE IDLE ON NEUTRAL U SHOULD HEAR THE BEARING,ONCE U PRESS ON THE CLUTCH PEDAL IT SHOULD GO AWAY RIGHT IS WHAT I SHOULD OF REPLIED EARLIER MY BAD

 

Yeah I think It could just be your throw out bearing. I would just drop the engine do full clutch job on it and reserface your flywheel if needed and that way your all set.

 

Also i would check your clutch fork attached to your throwout bearing from were you bleed you clutch this sometimes comes loose and needs to be tightened down.

 

Have you already ruled out a loose or cracked exhaust heat shield?

 

I currently have none of the heat shields installed. The shift fork is still tight no play. With the car in neutral idling when I hear the noise and press the clutch in the noise doesn't go away. I could have the clutch fully depressed and the noise is still clear as day. So that would rule out the throwout bearing? I'm starting to think it's a bearing inside the transmission. I been having some issues with this trans. Bad 3rd gear synchro, leaking axle seal (diff going out?). But with the test I just did if that does rule out the throwout bearing I'm just gonna replace the whole trans then.

 

So you have noise no matter what you do with the clutch? If you shove the clutch in and the noise doesn't go away its not the transmission. Likewise if the clutch pedal isn't depressed and you have noise its not the throwout bearing either. Recheck where the noise is coming from.

 

^I agree.

Might a bad flywheel pilot bearing have this behavior?

 

Yeah if I shove the clutch in I still here the noise. When the clutch is depressed I still hear it. I'll jack the car up again and check cause when under the car right under the flywheel I can hear the noise clear as day.

 

I've never seen it happen. When the clutch is out the flywheel and input shaft should be turning at the same speed, meaning the pilot bearing shouldn't be turning, so there shouldn't be any noise there.

 

Thanks. Makes sense.

 

Ok, so now I'm positive the noise is coming from that area. The noise is evident no matter what I do with the clutch. I noticed now that when I'm driving and taking off I can hear the noise. It's like it gets louder as soon as you take off but then quiets down. When I'm cruising you can hear it also (went round the block with windows down no music). While. cruising it sounds like a relay buzzing but not as loud.

 

It may be time to drop the transmission and inspect the clutch and flywheel.

 

Mine is making same noise, It only makes it when car is idling without clutch pushed. When I push clutch down it stops so is that the throwout bearing ?

 

No, thats one or more of the 5 bearings inside the transmission.

 

This would have been a PM to you because it's off topic, but I'm unable to do that until I post 5 messages demonstrating my utter lack of knowledge and the fallacy of requiring me to take up everybody else's time with 5 posts of nothingness.

Five days ago I bought a 1999 Acura 3.0 CL manufactured May/99. It has 60,000 miles and a four-speed automatic which may have a reputation for failing. I say "may" because Acura issued a transmission campaign for models made July of 1999 to August 2000.
An Acura spokesman said in the LA Times in Sept 2002: "The four-speed models were afflicted with a bad bearing that could break apart, scattering fragments of metal that clogged fluid passageways in the transmission, causing it to shift erratically, he said."
If the July start date was an economic-based date and not because they used different trannys after that date, I may have reason to be worried.
Do you know how many bearings there are in a four-speed automatic and/or where I can get a diagram of them? I want to pay to have the transmission inspected, specifically the bearing in question and looking for clogs.
I think I have detected slight anomalies in down shifts when I let off the gas at 25 mph. Also, it seems that the transition to neutral when I stop is kind of abrupt, as if the car has too much power still. Would that be a torque converter issue?
Proactive steps besides three fluid changes: I plan to put in an ATF cooling radiator. Basically, I want to give this transmission its best possible chance of not developing a problem. Any advice you have would be very appreciated.
Thanks for your time and sorry to bother you.

 

You could have just started a new thread, just saying.

Honda may have used a revised bearing after that date, or they may have been like the '99 - '01 Odysseys that had the same issue, in 2002 they changed to a 5 speed automatic (with its own issues) I don't know, I don't normally work on CLs

This should help, most of the bearings are under AT converter housing and AT transmission housing. '96 - '00 Civic manual transmissions had issues with the mainshaft bearings going bad, the plastic cage would fly apart and get thrown around in the transmission, I assume its the same issue. Only difference is in automatic transmission when piece of plastic get thrown around and ends up in the valve body it causes serious issues.

http://www.acuraoemparts.com/delray/...ll&ListAll=All

It could be, or it might be a harsh downshift into first.

Personally I don't think a cooler is going to do much for you. Heat was never really an issue to start with. I think the biggest issue was honda using ball bearings with plastic cages instead of metal. Theres not much you can do about it really (btw, you can't just go to place that specializes in bearings and seals and order bearings for a honda transmission most of the time, even though the bearings are usually made by NTN and have an NTN part number stamped on them they're usually a weird size and are normally made especially for honda and only sold to honda, I know because I already tried ordering bearings this way to get around paying ridiculous prices)