Problem:
- Transmission makes a "spinning, grinding sound" like a bad bearing when:
1) car is motionless AND clutch NOT engaged (car not in gear)
2) tranny noise stops spinning (you hear it slow down in ~2 sec) once you engage clutch
3) when car IS in motion & car in neutral, you can still hear the sound (louder in lower gear than in higher gear - but then again, my car is freak'n loud)

Resolution - ATTEMPT 1
1) I said I'd never trust Acura again, but I figured what would it hurt to have their opinion (I even offered to pay for the diagnosis, which they wouldn't take & I'm glad 'cause they were wrong
2) Throw-out bearing was my hope, but I let them tell me to validate & that was their QUICK opinion. So I bought a new one (my current one has ~50,000 miles, the original had 75,000 & was just fine)
3) Just replaced the damn thing & car started right back up again & same freak'n noise.

Resolution - ATTEMPT 2
1) Now that I have to pull the case again I figured I'd replace whatever looked worn.
a: Any special tools needed to replace the main shaft bearing?
b: Any recommendations on other things to replace on an old R tranny (synchros? etc)

FYI - my clutchmasters stage 3 flywheel, pp, clutch looked great when I pulled the tranny last night - they grab like brand new (put in @ 75,000...now I have 117,000)

I wish it was cheap & easy to buy another tranny 'cause I'd to that & have mine for parts

Any thoughts?

 

Just get the 4 (5) main bearings and the 3/4 syncro to install.
I think my tranny has the startings of the same noise that you have but I can hear it better b/c my car is quiet.

Mine is noise free at a stop (clutch in or out).
Once I put it into gear and roll forward (with low engine revs) I can hear a low growl.

The bearings / synco kit will be much $... but vs. a new tranny (which is what you will almost have once you are done) the cost seems to be ok.

I guess my winter project will be tranny rebuild.

 

Will, does it sound like mine back when?

 

Thanks for the input - my 2/3 gear is the only one that ever grinds (only occaisionally at HPDEs like T10-11 at BeaveRun). I figure I should replace them all since I'm in there though

Is there any problem to run it at another HPDE before pulling the damn thing out again? just curious if a nuclear exposion would occur or if they take a LONG time to completely fail???

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bbasso &raquo;</TD></TR><TR><TD CLASS="quote">Will, does it sound like mine back when?</TD></TR></TABLE>
good god no.

yours = 100X worse.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BudMan &raquo;</TD></TR><TR><TD CLASS="quote">my 2/3 gear is the only one that ever grinds</TD></TR></TABLE>
The 3/4 syncro kit comes together.
I guess you would need the 1/2 syncro kit also. ($)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BudMan &raquo;</TD></TR><TR><TD CLASS="quote">Is there any problem to run it at another HPDE before pulling the damn thing out again?</TD></TR></TABLE>
as long as the nosie is not getting worse. flush the fluid and let 'er eat.
I guess with anyting the longer you wait the worse it 'could' be.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Willard &raquo;</TD></TR><TR><TD CLASS="quote">
as long as the nosie is not getting worse. flush the fluid and let 'er eat.
I guess with anyting the longer you wait the worse it 'could' be. </TD></TR></TABLE>

hmmm - sounds tempting...I've got a 1 day event at MAM that I was invited to & I hate to not miss that 'cause it's my only shot at MAM this year

 

BTW - I Love having the opportunity to meet people like "willard", "itrsport", "edwin", "sgT", and many others at the Expos. It really changes your prospective when you need a 'second opinion' like this.

**I realize any final decisions are mine & I my destroy my tranny completely...but then again I'm getting pretty good at pulling this damn thing out in a couple hours

 

Did you replace the pilot bearing with the clutch? Even if so, those don't last long, and make a lot of noise when dead. You should be able to inspect it by turning it with your finger even with the clutch in. If rough, replace. Cheap too. I'd throw one in while you have the thing apart next time just because. Requires PP removal. You can use a bearing puller to avoid removing the flywheel, but it's just 6 more bolts, and a lot easier to press back in with the flywheel out. Inspect the clutch again while out, could be worn again with your mileage. R clutches don't seem to last too long.

Yes, could be getting time for main bearings. You need to follow the Helms and check the wear on the shift piece, change holder, main shaft, etc. too if you crack the tranny cases. Don't forget the main shaft end play shims either. Those will be worn. How's your drive line 'slack' from on throttle to off throttle transitions, or during trailing throttle downhill?

 

your syptoms are the classic example of main shaft bearing


91002-PS1-003 is the bearing that fails most of the time , bearing closest to the clutch on the mainshaft
I like to change 91004-P21-003 at the same time, bearing furthest from the clutch on the mainshaft

that should get rid of your noise

good luck, check out IN VTEC's how to
https://honda-tech.com/zerothread?id=795700

 

I have the same symphtoms, my noise stops after 1-2sec after pressing the clutch pedal. I'm going to open the tranny tommorow (Monday).

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dan GSR &raquo;</TD></TR><TR><TD CLASS="quote">your syptoms are the classic example of main shaft bearing


91002-PS1-003 is the bearing that fails most of the time , bearing closest to the clutch on the mainshaft
I like to change 91004-P21-003 at the same time, bearing furthest from the clutch on the mainshaft

that should get rid of your noise

good luck, check out IN VTEC's how to
https://honda-tech.com/zerothread?id=795700</TD></TR></TABLE>

Wow - that's a helluva pictorial! What's the ballpark time-frame for a first timer once you open the case to replace the main-shaft bearing & any synchros that are bad?

 

I have the same noise but mine goes right away when I just start to tap the clutch....I think its the pilot bearing....I already changed the mainshaft bearing and the angular bearing. Any input??

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ultimatehonda &raquo;</TD></TR><TR><TD CLASS="quote">I have the same noise but mine goes right away when I just start to tap the clutch....I think its the pilot bearing....I already changed the mainshaft bearing and the angular bearing. Any input??</TD></TR></TABLE>

fwiw - it sure sounds like it's coming from inside the case rather than the pilot bearing. I would think if it was the pilot bearing, I would hear the noice non-stop whether or not I had the clutch engaged.

I won't be able to pull the tranny again until next weekend - I've got to pull tnord's this weekend

 

Hrmph...

Mine will be coming out this winter for new bearings. Sounds like fun

And clutch and timing belt/pump/tensioner and wheel bearings and my visa a splode.

 

My trans was making the same noise and I worried like always. I was under the impression that is was main shaft bearings. I had an once in a lifetime deal come up to swap my tranny for a new one. I did so. The person who has my original trans now has torn it down to fine that it is 100% ok, no worn or shot bearings or syncros.

The noise that my car makes is my ACT XT-SS Clutch. The Disc when the car is stopped in neutral makes the same noise Budman describes. I know this b/c the same noise is present with the brand new OEM tranny.

Which Clutch to you run Budman?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Smitdog &raquo;</TD></TR><TR><TD CLASS="quote">
Which Clutch to you run Budman?</TD></TR></TABLE>

i think he said clutchmaster stage 3, so it is more than likely something in the tranny, not the clutch.. unless it's more of an issue of that type/strength of clutch, since I would imagine the stage 3 is similar to your setup, steve..

no noise with mine, but my clutch is a bit different.. and that tranny better not make any friggen noise.. lol..

 

It cant be from the case because I already opened it up and replaced those bearings, a shop even looked at them and said they were good. The only other bearings left are the pilot bearing and the T.O. bearing. The T.O. bearing I checked when I dropped the tranny last and it made no noise when it was spun, it also only has 10k on it. Now someone said their clutch is the reason for making that noise? I have an Action 1ms clutch in there. I dont know if that is the reason for making all that noise....also when I disengage the clutch the noise goes right away....as where other people have said it takes 1-2 sec to stop.....maybe its the T.O. bearing...

 

sound like the pilot and throw-out bearing to me

 

I've already had the clutchmasters stage 3 clutch, pp, flywheel in there for ~45,000 mile & no extra noise. This noise is new & definately a problem

 

some of you should read a little closer...throwout bearing was just replaced last week in a **cross-fingers** attempt to solve the problem. The old bearing spun just fine when I took it out.

pilot bearing....well - I should have checked that while I was in there, but didn't feel like the extra work Guess I'll look next time

 

still sounds like a pilot or throw out bearing

 

What do you mean by the "pilot bearing"? Does it sit on a mainshaft, countershaft or where?

 

Pilot bearing is on the flywheel.

 

Sounds just like my car Jeff.

My trans...well, makes my car sound like a weird WRX when in gear. Input shaft bearing is my best guess. I'm pulling it this month hopefully.