Since I totalled my Prelude and moved to the ITR, I have some noise problems with my tranny, that I didn't have on my Lude . I believe you, Prelude friends will help me out.

I already changed these bearings:

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!

 

Take a look if the plate is not touching flywheel screws. I got that in my Lude before. It was faulty Exedy plate :/

 

Did you check the bearings on the diferential?

Pirate

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pentaq &raquo;</TD></TR><TR><TD CLASS="quote">Take a look if the plate is not touching flywheel screws. I got that in my Lude before. It was faulty Exedy plate :/</TD></TR></TABLE>
But how could these screws make noise when the plate is connected to the flywheel?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PirateMcFred &raquo;</TD></TR><TR><TD CLASS="quote">Did you check the bearings on the diferential?
Pirate</TD></TR></TABLE>
The differential is not spinning while the car is stopped IMO, only the mainshaft can make noise in this case.

 

I think what he is saying is make sure the Clutch disk is not hitting the flywheel screws. I have heard of that being a problem.... But I don't see how it would continue to make the nose when the clutch is 100% engaged.... It does stay when your foot is off the clutch right?

The only thing that I can think of is some how something is out of balance. Maybe the mainshaft got dammaged in the accident?

 

I know this may sound stupid but have you checked or replaced the imput shaft bearing? (throwout bearing)What kind of shape was it in before the rebuild? How many miles? It's kinda hard to hear but sounded like mine when it went out.

 

also make another post in the ITR forum if you havent done so already. It probably wont get you anywhere but its worth a shot.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by petrv &raquo;</TD></TR><TR><TD CLASS="quote">
The differential is not spinning while the car is stopped IMO, only the mainshaft can make noise in this case.</TD></TR></TABLE>

Oops. Duh.
Got me stumped unless it is a needle bearing on the mainshaft

Pirate

 

i have the same noise coming from a 95 prelude i just built for my freind...haven't road tested it yet, no tags...but the noise is present until you press in the clutch, then it stops not imediately, but it winds down....its a jdm h22a, new clutch, and usdm tranny

 

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.