Noisy Muncie
Thread Starter
Burning Brakes
Joined: Aug 2000
Posts: 1,211
Likes: 6
Noisy Muncie
I notice that my M-20 4 spd seems to be making a noise while in neutral at idle. Sounds like a mechanical noise but not real,real loud, just enough to notice.Not so much a tapping sound as a loose rattle, although that may not be the best description as it's hard to tell over the exhaust. It has fluid and shifts fine. I had the tranny rebuilt and I'm wondering if that might be the cause?
Is this a natural thing with these trannys? :flag :chevy
Merry Christmas, Mark
Is this a natural thing with these trannys? :flag :chevy
Merry Christmas, Mark
Melting Slicks
Joined: Mar 2000
Posts: 3,206
Likes: 0
From: WANTED: '68 rear valance with b/u light assemblies IM, e-mail, or PM me here. Thanks!
Re: Noisy Muncie (marky mark)
Are you sure the clutch is fully disengaging and/or it isn’t the throw-out bearing you are hearing?
Drifting
Joined: May 2000
Posts: 1,573
Likes: 1
From: Ga.
Re: Noisy Muncie (marky mark)
Did you also re-install the return springs in the right locations? Sometimes you can get vibrations in the linkage at idle. It could also be the throw-out bearing making noise. Did you replace it when you rebuilt the transmission? My car's throw-out bearing started making noise after the car sat for several months. Oneday the noise just stopped... :confused:
Burning Brakes
Joined: Aug 2000
Posts: 1,080
Likes: 1
From: Frankfurt, Taunus Hills
Re: Noisy Muncie (marky mark)
Check linkage for loose parts.
I had the problem when the shift rods directly at the tranny were loose.
Also check if the problem occurs in cold and warm condition.
I had the problem when the shift rods directly at the tranny were loose.
Also check if the problem occurs in cold and warm condition.
Thread Starter
Burning Brakes
Joined: Aug 2000
Posts: 1,211
Likes: 6
Re: Noisy Muncie (454Big)
It could be the throw-out bearing I suppose, but that was new also. It actually sounds as though it's coming from the transmission case itself. I was and should have sent it off to "4-Speeds by Darryl" but I didn't. DOHHHH !!!
Merry Christmas,
Mark :flag :chevy
Merry Christmas,
Mark :flag :chevy
Advanced
Joined: Aug 2001
Posts: 85
Likes: 0
From: Cheyenne WYO
Re: Noisy Muncie (marky mark)
Mark,
When your hearing the noise , De-press the cluch, and see if the noise doesnt change or stop, Shift the gears, then back to neutral and see if the noise doesnt change. If the noise persists through these checks, Get under there with some kind of stethoscope and see if you cant isolate the noise.
I had a thump thump kind of noise starting up cold at idle. It went away when I changed to sidepipes :D..
seriously it was just the flywheel whirling, I wasnt bothered because it only did it cold, for a minute ,so I disregarded the flywheel being out of balance
TC
When your hearing the noise , De-press the cluch, and see if the noise doesnt change or stop, Shift the gears, then back to neutral and see if the noise doesnt change. If the noise persists through these checks, Get under there with some kind of stethoscope and see if you cant isolate the noise.
I had a thump thump kind of noise starting up cold at idle. It went away when I changed to sidepipes :D..
seriously it was just the flywheel whirling, I wasnt bothered because it only did it cold, for a minute ,so I disregarded the flywheel being out of balance
TC
Racer
Joined: Oct 2000
Posts: 487
Likes: 1
From: Aloha, OR, USA
Re: Noisy Muncie (marky mark)
Mine had done this for as long as I have owned the car. I replaced the clutch and throwout bearing not too long ago, and it didn't change a thing. Most days I don't hear it at all, and then once in a while it comes back. I also presume it is something inside the tranny -- I rebuilt mine also. If you find out what it is, please let me know too! :)
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Thread Starter
Burning Brakes
Joined: Aug 2000
Posts: 1,211
Likes: 6
Re: Noisy Muncie (john73bb)
Will do John73BB. I've got to take it by the guy who did the rebuild as the rear seal is already leaking. I'll have him listen to it and get his opinion. It may be nothing, but I can't imagine GM would design/build a tranny that made noise.
Regards, Mark
Regards, Mark
