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Old 05-20-2014, 12:35 PM   #1
Leever2000
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Default Rear End whine

I posted a couple of comments about the whinning in the rear end of my 2003 Legacy automatic transmission a couple months back.

I still have the whinning, if the car is rolling it is whinning whether it is in neutral or drive. I checked/replaced the fluid. Thanks
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Old 05-20-2014, 09:27 PM   #2
DampedSubaru
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At what speeds does it happen?
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Old 05-21-2014, 05:41 AM   #3
EdHilario
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Can you post a video with you driving and idling?
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Old 05-21-2014, 07:44 AM   #4
Leever2000
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All speeds, it sounds like I have a set of nobby tires. Other than the noise it drives fine.

No videos, if I am going down hill and I put the car in neutral the noise does not change.
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Old 05-21-2014, 01:11 PM   #5
Rudgers73
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Speaking of sounding like knobby tires, what do your tires look like? Any chopping or uneven wear? It's amazing how loud tires can get
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Old 05-21-2014, 01:23 PM   #6
bobko
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Quote:
Originally Posted by Rudgers73 View Post
Speaking of sounding like knobby tires, what do your tires look like? Any chopping or uneven wear? It's amazing how loud tires can get
Good question. I test drove my current 1995 Legacy when it had 75k miles on it, and there was a lot of droning noise coming from the rear. I thought it might be a wheel bearing, so the seller (a dealer) knocked a few hundred off the price. Turns out the problem was bad tires -- new ones made the car MUCH quieter.

I now have 246k miles on the car.

Bob
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Old 05-21-2014, 02:47 PM   #7
Leever2000
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If the tires are the culprit that would be a relief. I will try rotating the tires and report.
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Old 05-21-2014, 09:22 PM   #8
DampedSubaru
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Could very well be the tires. Inspect them and report back to us. I've heard of a similar problem but the sound ended up coming from the rear differential. Could also be a bearing. Does the sound get louder as you speed up?
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Old 05-22-2014, 09:03 AM   #9
Leever2000
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I checked the tires out yesterday, ran my hands over the tires and the rear tires felt like they maybe cupped. I may be biased because I want it to be the tires. The plan this evening is to swap/rotate the tires and see if the sound changes etc... I'll keep you posted. How do the tires get cupped, what are the causes?
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Old 05-22-2014, 12:32 PM   #10
EdHilario
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Alignment and suspension / steering components.
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Old 05-22-2014, 01:53 PM   #11
Leever2000
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The reason I asked is that I just replaced the rear spring/struts last weekend. Maybe it is the tires, I will check this evening. I have 4 steel rims with good tires from a VW Jetta - same size tires as the Subaru. Question - will these wheels fit the Subaru at least to confirm the rear end noise is from the tires or not?
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Old 05-22-2014, 02:29 PM   #12
chazly413
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I would just try it out. You'll know pretty quickly if they fit or not.
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Old 05-22-2014, 02:39 PM   #13
Rudgers73
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VW wheels wouldn't fit
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Old 05-22-2014, 04:46 PM   #14
EdHilario
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If it's from 95-05 it's also 5x100 according to a quick Google search.
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Old 05-22-2014, 05:03 PM   #15
Rudgers73
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Oh, thought they were all 5x114.3 maybe they will!
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Old 05-22-2014, 05:12 PM   #16
EdHilario
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Newer ones are but it's so quick to check just take one off the Subaru and try to put the VW wheel on.
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Old 05-27-2014, 07:26 AM   #17
Leever2000
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I tried the VW wheels and they do fit but the whine is still there.
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Old 05-27-2014, 09:23 AM   #18
DampedSubaru
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My guess is the differential.
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Old 07-08-2014, 07:14 PM   #19
Leever2000
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It has been a couple months since the last post but I am reporting that the sound is still there. I can only assume the issue is a bearing in the rear differential.
What years and models have the same rear differential that I have (I have a 2003 Legacy), for example if I were to find a Sub for sale (cheap - blown head gasket) thoughts?
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Old 07-08-2014, 08:17 PM   #20
DampedSubaru
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Call some scrapyards, could probably pick up a diff for pretty cheap. But, I suggest against it because well, it is a scrap yard, you have no idea if the part is still working.

Either buy a new one or find someone willing to sell you their differential from their scrapped Subie.

I doubt you can get a better price from buying a full car and taking the diff than just buying a new diff.

You can also try JDM shops.
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Old 07-09-2014, 05:47 AM   #21
Leever2000
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My intentions were to find/buy a Subie from someone who has one for sale with issues other than the rear end.

Another piece of information, as I drive up and down the road every day for work I notice the sound is from rear end on the passenger side.
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Old 07-09-2014, 06:45 AM   #22
DampedSubaru
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I don't know if it was covered in recent posts but, it could be a wheel bearing.
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Old 07-09-2014, 07:06 AM   #23
ride5000
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I had a bearing whine.

ended up the snout bearing in the rear diff.

50 bucks from a guy who went 6 speed for a pulled one.
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