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AFM #725
 
Gawernator's Avatar
 
Join Date: Apr 2012
Location: San Jose, CA
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Weird sound

Strange high-pitched whining coming from under or near the gear-shifter, almost in the center console armrest area it seems. A metallic sound, somewhat grating, it appears during acceleration in third and fourth gear (ish) and stays upon deceleration. Putting in the clutch makes it go away completely. The sound modulates when I play with the accelerator pedal. I'm a bit worried...

It's not there at idle and doesn't appear generally until the point from shifting 2 to 3

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Old 05-26-2012, 10:16 PM
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AFM #725
 
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Join Date: Apr 2012
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I'm maybe thinking it could just be a loose exhaust? Hopefully nothing gear related. The PO welded on a straight pipe and I'm about to have a shop put the cat back on.
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Watchdog Armory Racing AFM #725 Thanks to my 2017 Sponsors: JPH Suspension | AXO | Armour Bodies | BELL Helmets | Braven | EVLUTION Nutrition | Forcefield Armor | FunTrackDayz | Galfer | Motion Pro | MOTUL | Matrix Racing Concepts | ODI Grips | OGIO | Shorai Inc. | SPEEDMOB | Vortex | Woodcraft | Wicked Audio
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Old 05-26-2012, 11:53 PM
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968 GUY's Avatar
 
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I have to adjust my exh. today. Mine is thumping against the center tunnel. whenever I drop the exh. it takes a couple of tries to get it right.

The 968 has a triangular pre-muffler that rides in the tunnel, and is fairly tight fitting.
Not sure about whining unless it is throwout bearing, pilot bearing or TTbearing.
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Old 05-27-2012, 02:43 AM
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Proprietoristicly Refined
 
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Quote:
Originally Posted by Gawernator View Post
Strange high-pitched whining coming from under or near the gear-shifter, almost in the center console armrest area it seems.

A metallic sound, somewhat grating,

it appears during acceleration in third and fourth gear (ish) and stays upon deceleration.

Putting in the clutch makes it go away completely.

The sound modulates when I play with the accelerator pedal. I'm a bit worried...

It's not there at idle and doesn't appear generally until the point from shifting 2 to 3
If the rubber center clutch has been replaced and the TO bearing guide tube replaced at the same time......

Torque tube bearings. Time for a rebuild/replacement.

You could do a couple more checks on the rear CV joints. They might be transferring a noise-unlikely.

You could also disconnect the rear coupler between the transaxle and TT. Just remove the 2 bolts and slide the coupler back towards the transaxle. Start the car.

Do the same tests you mentioned---pressing in the clutch....ect.

If the "metalic, grating" noise is still there it points to the TT.

John
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Old 05-27-2012, 05:17 AM
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AFM #725
 
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Join Date: Apr 2012
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Okay, thanks a lot John!

Old 05-27-2012, 08:32 AM
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