So, today I diagnosed my strange noise coming from the stick area. I was stopped in neutral, revs kept at 3000rpm. With the clutch pedal pressed down, there is no noise. When I release the clutch pedal (so it connects to the tranny), it starts to make the noise. The noise is just like some worn bearing with some play. Is this in a clutch or some bearing in the tranny (and which of them)? It makes this noise even while driving, but it's not that noticable. When stopped, everybody can hear it.

Thank you,
Petr

 

Mine does the same thing. Just ordered up 5 new tranny bearings from Len. Hopefully that'll fix my driveline slack too.

 

Won't help the slack, but the bearings will cure the noise.

Check out the rear tranny mount when you box is removed. I had a nice crack in mine that caused drivetrain slack. Once replaced (and the gearbox bearing replaced) the car felt like new again.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by typer_801 &raquo;</TD></TR><TR><TD CLASS="quote">Won't help the slack, but the bearings will cure the noise.

Check out the rear tranny mount when you box is removed. I had a nice crack in mine that caused drivetrain slack. Once replaced (and the gearbox bearing replaced) the car felt like new again.</TD></TR></TABLE>

No crack in the rear mount, already check that. Not in the CV joints. Only other place it can be is in the bearings, which i'm replacing cause they are making noise. Or the main shaft splines are worn on either the main shaft or the clutch. I'll be able to check this when i drop the tranny to replace the bearings.

 

my guess is mainshaft bearing

 

I just replaced three bearings and it fixed the noise.

 

input shaft bearing ~ the noise is on all the time.
throw out bearing ~ when the clutch pedal is depress.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Humping_dragon &raquo;</TD></TR><TR><TD CLASS="quote">input shaft bearing ~ the noise is on all the time.
throw out bearing ~ when the clutch pedal is depress.
</TD></TR></TABLE>

I just replaced the throwout bearing & it didn't cure the problem. I think mine problem is in the case. I even went to acura to have a diagnois (throw-ot bearing) which was my initial thought. So much for planning. Car started right back up again & same freak'n noise.

Any special tools needed to replace the main shaft bearing?
Any recommendations on other things to replace on an old R tranny (synchros? etc)

 

if you are going to tear down a tranny to replace that bearing, you might as well consider changing all the bearings, and syncros....depending on how old your transmission is.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by w@@t w@@t &raquo;</TD></TR><TR><TD CLASS="quote">if you are going to tear down a tranny to replace that bearing, you might as well consider changing all the bearings, and syncros....depending on how old your transmission is.</TD></TR></TABLE>

You might as well since you're going to be in there and wont have to do any internal work for a long while thereafter.

And yes it is a common misconception that the throwout bearing is the cause. I tried that myself and it was still there after I replaced it. The key to finding the source is the time it takes for the noise to stop once you depress the pedal. If the noise goes away right away then it should be the t/o bearing. If it slowly goes away then you know its one of the bearings in the case (main or countershaft).

All you really need to replace it is a deep socket and maybe a 6" extension and it'll pop right out. Replace the mainshaft seal while you're in there as well. The rest of the bearings require a puller and a press if available.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Echo7847 &raquo;</TD></TR><TR><TD CLASS="quote">
The key to finding the source is the time it takes for the noise to stop once you depress the pedal. If the noise goes away right away then it should be the t/o bearing. If it slowly goes away then you know its one of the bearings in the case (main or countershaft).
</TD></TR></TABLE>
Great info. In my case, the noise dissapears gradually in about 1-2 seconds. Main or countershaft bearings will be probably my problem.
Is the faulty bearing "visible" immediatelly? I mean, will I recognize the bad bearing by hand, eye etc? Or all the bearing can look fine and I have to guess which one is bad? How does a bad bearing look like?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Echo7847 &raquo;</TD></TR><TR><TD CLASS="quote">
All you really need to replace it is a deep socket and maybe a 6" extension and it'll pop right out. Replace the mainshaft seal while you're in there as well. The rest of the bearings require a puller and a press if available.</TD></TR></TABLE>
What if the press is not available? Can I use hammer or somthing like this?

Thanks again for great info.