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Registered
Join Date: Oct 2008
Posts: 2
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Vibrating Noise
Hi all.
I need some help with my 89 944 Auto. It is making a strange vibration noise, but only at a certain speed/rpm around 40mph - between 2-3k rpm. It's quite loud and really annoying. It only does it while driving and not while stationary. The noise is worse when using slight throttle, when I get off the throttle it stops and when I accelerate harder it also less noticable.... Anyone any idea what it might be or have a similar noise? |
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10-11-2008, 07:24 AM
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Proprietoristicly Refined
Join Date: Jul 2001
Location: ~Carefree Highway~
Posts: 5,833
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Quote:
Vibraton + noise + driving rpm 2-3k = IMO means your automatic transmission flex disc/damper is on the way out. This is a common repair and a very expensive part +-$1100 by itself.  GL and welcome to the forum. Start a search on "flex disc" or such in this forum. John_AZ 1988 924S + 1987 924S |
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10-11-2008, 07:57 AM
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Registered
Join Date: Oct 2008
Posts: 2
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From reading other posts about the flex disc, this does not sound like the same problem. The symptoms are different.
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10-15-2008, 06:44 AM
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Proprietoristicly Refined
Join Date: Jul 2001
Location: ~Carefree Highway~
Posts: 5,833
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You may want to check the drivetrain for possible cause. I copied this from an old post:
Check the CV joints. Jack the rear end up, you only need to jack up one side to test. Put the car in 1st gear and rotate the rear tire back and forth. hold the CV joint /driveaxle in one hand and feel the difference of movement. If a/many cv joint/s are bad, you'll probably hear the clunking but definitely feel a difference in movement. eg. CV joint moves, drive axle does not = bad CV joint. If the CVs are good and you think it's the ring and pinion, pop the little inspection plug from the forward nose cone of the tranny and rotate the tire again. If the driveline shaft doesnt move but the wheel does, it's in the tranny. If the driveline shaft does move, it's not in the rear end. While the rear axle is in the air, grab the tires and check for play to rule out the rear axle bearing. GL John_AZ 1988 924S + 1987 924S |
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10-15-2008, 06:56 AM
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