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General E46 Forum
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Old 11-27-2010, 03:38 AM   #1
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E46 transmission whine...

Wondering if any of you have a whine with the 320z 5-speed ZF transmission. I have a whine that is a high-pitched hum which kind of sounds like a supercharged whine (but very faint). The noise happens under load whether slight or heavy, at pretty much any speed over 15mph. If I manipulate the gas to where theres no load on the transmission (coasting) the noise goes away but returns as soon as i let off the gas or get on the gas. The noise also goes away when at speed and the clutch is pushed in.

Any ideas? The transmission seems to operate flawlessly other than the noise.
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Old 11-27-2010, 10:05 AM   #2
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Maybe check your rear diff fluid....i know mine whined just like you said in my old car when it needed changing. I though it was the trans for a while.
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Old 11-27-2010, 10:33 AM   #3
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maybe yours has straight cut race gears.
try shifting without the clutch and see if its sequential also.

whats a 320z anyway?
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Old 11-27-2010, 12:08 PM   #4
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Quote:
Originally Posted by snikwad View Post
maybe yours has straight cut race gears.
try shifting without the clutch and see if its sequential also.

whats a 320z anyway?
no.

Quote:
Originally Posted by CBell330 View Post
Maybe check your rear diff fluid....i know mine whined just like you said in my old car when it needed changing. I though it was the trans for a while.
Diff fluid has already been changed. It's not that anyway, the sound is coming directly from under the mid-section of the car.
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Old 11-27-2010, 12:16 PM   #5
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is the tranny leaking, maybe a seal is busted, or a bearing in the tranny is shot.

is it the same whine sound a car makes when u reverse?
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Old 11-27-2010, 03:09 PM   #6
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Oops. Yours is a manual. Have you checked the fluid level?
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Old 11-27-2010, 04:46 PM   #7
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Quote:
Originally Posted by snikwad View Post
is the tranny leaking, maybe a seal is busted, or a bearing in the tranny is shot.

is it the same whine sound a car makes when u reverse?
I believe this guy is right-on! This, I suspect is your real problem. I had prolly the same 'whine' for a while until the dealer spotted the leak, had them fix it 4 weeks ago and the whine has been gone since...
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Old 11-28-2010, 11:33 PM   #8
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Originally Posted by E46Mango View Post
Wondering if any of you have a whine with the 320z 5-speed ZF transmission. I have a whine that is a high-pitched hum which kind of sounds like a supercharged whine (but very faint). The noise happens under load whether slight or heavy, at pretty much any speed over 15mph. If I manipulate the gas to where theres no load on the transmission (coasting) the noise goes away but returns as soon as i let off the gas or get on the gas. The noise also goes away when at speed and the clutch is pushed in.

Any ideas? The transmission seems to operate flawlessly other than the noise.
Might be your throw out bearing
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