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Old 07-23-2008, 11:18 PM   #1
highspeed11
Scooby Newbie
 
Member#: 30937
Join Date: Dec 2002
Chapter/Region: BAIC
Location: Livermore, Ca
Vehicle:
2005 Legacy GT
GRP

Default A couple of noise/driveline issues. ('99 LGT)

My poor rusty Subie is currently at 125K and some change. I've done a few searches and haven't come up with anything useful. Recently, I have had a few odd noises surface.

The first began as an intermittent, squeeky/squeeling noise. The next sound happened a few weeks later. The best way to describe it, is the sound of running over the reflectors on the freeway, with a little bit of vibration along with it. I could be dealing with two sepaerate issues here, I'm not sure yet. That's where ya'll come in.

I've driven it enough recently to find that A: the sound(s) almost always disappears while accelerating. And only becomes noticeable while coasting. B: The noise (especially the knocking type noise) comes on when I let off the gas at almost any speed. Definitely vehicle speed related. C: It also goes away when I turn or swerve left or right. D: The noise(s) seem to come from the front center or left of the vehicle. E: Installing the FWD fuse doesn't seem to change anything.

So far that's all I got. Any help would be greatly appreciated. The only things I've done: I changed my front and rear diff oil when I heard the first sqeeling type noise and I noticed some grease leaking out of my L/F output seal on the front diff.
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Old 07-23-2008, 11:52 PM   #2
Jonathan
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Member#: 4021
Join Date: Feb 2001
Chapter/Region: NESIC
Location: Natick, MA USA
Vehicle:
1999 Legacy GT Ltd
Quick Silver Metallic

Default

highspeed11 -

Tell us some more about your car, please.

Is it a 5-Speed manual Transmission or the 4EAT Automatic ?
EDIT: if you have a FWD fuse, its an Automatic.

The first things that spring to mind are a wheel bearing that is getting ready to let go, or maybe a CV joint/axle assembly that is on the way out. I don't claim to know that it is either of these things, these are just possible 'suspects'.

Jack up the car and test each wheel/tyre for 'looseness' by rocking the wheel tyre side to side and up and down. Excessive play is often times caused by a worn wheel bearing.

Also visually check each CV joint's protective rubber boot for any cracks or "splitting". If you spot these, its often times "too late" to repair and you simply install either a brand new or "rebuilt" CV joint/axle assembly.

You can usually let the CV joints alone for sometime before they finally let go, but a failing wheel bearing (if thats what you have) can be a very serious issue and should be replaced promptly.
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Old 07-24-2008, 10:01 AM   #3
highspeed11
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Member#: 30937
Join Date: Dec 2002
Chapter/Region: BAIC
Location: Livermore, Ca
Vehicle:
2005 Legacy GT
GRP

Default

Yes, it is an automatic.

I'm pretty sure my L/F lower ball joint is worn. Could be the bearing too. However, I've never heard a bearing make a high pitched sound. Usually a low, growling sound. Then again, I have zero experience with Subaru's save for the little I've had with my own car.

On my last oil change, I didn't notice any cracks in the CV boots or play in the joints.

Thanks for the reply.
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Old 07-25-2008, 09:59 PM   #4
highspeed11
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Member#: 30937
Join Date: Dec 2002
Chapter/Region: BAIC
Location: Livermore, Ca
Vehicle:
2005 Legacy GT
GRP

Default

Anyone else?
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Old 07-26-2008, 06:40 PM   #5
legacy1907
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Join Date: Aug 2005
Chapter/Region: South East
Location: Raleigh, NC
Vehicle:
05 WRX CGM
95 YJ Flat black

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high pitch sound is a wheel bearing
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Old 07-30-2008, 09:59 PM   #6
highspeed11
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Member#: 30937
Join Date: Dec 2002
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Location: Livermore, Ca
Vehicle:
2005 Legacy GT
GRP

Default

Alright. I'll have to check it out. Thanks.
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