tranny removal?. clutch chatter..

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08-23-2011, 02:00 PM
green-lantern

Quote:

Originally Posted by DrGonzo

So I got the video for the trans noise. Ignore the video and just pay attention to the sounds.

3000gt/Stealth trans noise - YouTube

Edit: I would embed the video here but it seems Alan did not install the YouTube Link Parser And I'm not going to spend all night trying to guess/search as to what the BB Code tags are!

Mine sounds a good bit like that. I don't know if you heard it at BRG or not. I've been told it's TOB but I have a SPEC clutch and synchromesh in the trans. lol not to mention the OBX LSD.

With the car in neutral it's hard to believe it's a transmission sound though. A friend of mine had the issue and ended up putting a bunch of grease on the TOB and it stopped. From what I understand this is pretty common issue.
08-23-2011, 02:15 PM
DrGonzo

Well when the trans is in neutral the internals are still turning. I have changed every part that supposedly causes it but it still rattles like crazy!!!
08-23-2011, 02:42 PM
green-lantern

Quote:

Originally Posted by DrGonzo

Well when the trans is in neutral the internals are still turning. I have changed every part that supposedly causes it but it still rattles like crazy!!!

I thought only a few parts move in neutral, the diff isn’t turning anyway. I’m not real sharp with transmissions though.
08-24-2011, 06:50 AM
TwIzTeD_3kGt

Quote:

Originally Posted by DrGonzo

Well when the trans is in neutral the internals are still turning. I have changed every part that supposedly causes it but it still rattles like crazy!!!

You haven't changed the clutch, which would be my first guess after listening to it.
08-24-2011, 09:52 AM
DrGonzo

It's not the clutch making the noise. it's internal. I mic'd the trans and it is coming from inside the case not the bell-housing.
08-24-2011, 11:13 PM
J. Fast

Quote:

Originally Posted by DrGonzo

It's not the clutch making the noise. it's internal. I mic'd the trans and it is coming from inside the case not the bell-housing.

Glad you eliminated the bell and engine side.

Can you isolate it to a shaft? Try putting the stethi on the shift fork impregnations on the end cover and see if it resonates thru the shift fork rails. Then check the same by listening to the input shaft right near the end plug.

I was thinking you might have a piece of a shifter return spring or a detent spring that may have broke. That's really really common. A few of the trans I have opened have broken hub/slider springs. The springs get brittle and snap. They then lace together and the detent ball rattles around in the hub/slider. The roller balls bounce off the back of the gears like a popcorn kernel which makes it sound like a rattle.

Hopefully the info helps Greg.
08-25-2011, 07:57 AM
TwIzTeD_3kGt

Quote:

Originally Posted by DrGonzo

It's not the clutch making the noise. it's internal. I mic'd the trans and it is coming from inside the case not the bell-housing.

Does the car drive?
08-25-2011, 08:13 AM
CoreyB

Reverse idler gear
08-25-2011, 08:38 AM
DrGonzo

Quote:

Originally Posted by TwIzTeD_3kGt

Does the car drive?

Yep car drives just fine!

Quote:

Originally Posted by CoreyB

Reverse idler gear

If so how do you go about fixing it?? What causes it?
08-25-2011, 08:59 AM
CoreyB

I read about it awhile back, seems overtime the idler loosens, I have heard a heavier gear oil helps a lot. I had a friend with a trans in his RTTT that would kinda spool up and bang moving the whole engine. I put in the factory recommended oil and it never did it again.
08-25-2011, 10:58 AM
green-lantern

I’m going to try a different oil and see if it makes any difference. I’ve changed it once already to check for metal. It’s time to do it again anyway.
08-25-2011, 01:40 PM
enollava

I dunno, that sounds like the TOB to me. It is on the shaft that goes into the body of the trans, and isn't connected in to the bell housing, so I could easily see the sound traveling down the shaft into the main case and you hearing it there best with a scope. My rattle sounded just like that, and when I replaced the TOB and lubed it some, the sound went away for a long time. Also remember, it goes away when you push the clutch pedal. Also, you said the car seems to shift fine otherwise. If something inside the trans were really so off that it was rattling, I doubt you would be shifting good. Inside the trans, things are rotating and meshing together. A rattle/loose part in there I would think would make for trouble shifting.
08-25-2011, 03:24 PM
DrGonzo

TOB and Input shaft bearing are brand new. Still sounds like shit so neither fixed the problem.
08-25-2011, 03:37 PM
green-lantern

Quote:

Originally Posted by DrGonzo

TOB and Input shaft bearing are brand new. Still sounds like shit so neither fixed the problem.

Now this is what I was told by a friend but he replaced the TOB and it still did it. Later he pulled it out and put a liberal amount of grease on it and it went away. I assume it’s true but it might not be your problem or mine. Did you use an OEM TOB?
08-25-2011, 07:05 PM
TwIzTeD_3kGt

Quote:

Originally Posted by enollava

I dunno, that sounds like the TOB to me. It is on the shaft that goes into the body of the trans, and isn't connected in to the bell housing, so I could easily see the sound traveling down the shaft into the main case and you hearing it there best with a scope. My rattle sounded just like that, and when I replaced the TOB and lubed it some, the sound went away for a long time. Also remember, it goes away when you push the clutch pedal. Also, you said the car seems to shift fine otherwise. If something inside the trans were really so off that it was rattling, I doubt you would be shifting good. Inside the trans, things are rotating and meshing together. A rattle/loose part in there I would think would make for trouble shifting.

My thoughts exactly. And there's really no way to tell the difference between a TOB rattle and a clutch hub rattle. They both act exactly the same. Stock clutch hubs are known to rattle, ask RayP.

Quote:

Originally Posted by green-lantern

Now this is what I was told by a friend but he replaced the TOB and it still did it. Later he pulled it out and put a liberal amount of grease on it and it went away. I assume it’s true but it might not be your problem or mine. Did you use an OEM TOB?

Did he pull it out to replace the clutch the second time? Or just to lube the TOB? Did he lube it the first time?
08-25-2011, 07:17 PM
green-lantern

Quote:

Originally Posted by TwIzTeD_3kGt

Did he pull it out to replace the clutch the second time? Or just to lube the TOB? Did he lube it the first time?

From what I understand he pulled the trans to inspect the clutch TOB ect. then lubed the shit out of the TOB and put it back together. I can call him, I haven't talked to him in a while anyway.

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