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1998 Subaru Legacy Could it be brakes or Rear Dif?

Tiny
MEEPER0701
  • MEMBER
  • 1998 SUBARU LEGACY
  • 4 CYL
  • AWD
  • MANUAL
  • 143,000 MILES
When I start to drive you can hear a thumping sound from the rear end. The faster you go the faster the thump and it eventually sounds like a roaring sound due to speed. When you apply the brakes it changes the pitch of the thump and when I take a right hand turn it does as well. Only the to the right, not the left. Is it more brake related or rear dif? What happens if your rear dif goes while your driving?
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Friday, August 21st, 2009 AT 11:41 PM

8 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
You sure its RWD let me know-
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Saturday, August 22nd, 2009 AT 12:05 AM
Tiny
MEEPER0701
  • MEMBER
  • 7 POSTS
Im almost positive that it is coming from the rear and my car is AWD.
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Saturday, August 22nd, 2009 AT 12:09 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be a u-joint, pinion gear, side gear and bearings in the differrential
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Saturday, August 22nd, 2009 AT 3:53 AM
Tiny
MEEPER0701
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  • 7 POSTS
What happens if any of that stuff goes when Im driving?
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Saturday, August 22nd, 2009 AT 11:07 AM
Tiny
RASMATAZ
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You'll be out of commission -Don't worry the rear differential is not gonna fall apart there's upper and lower control arms that's holding it together.
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Saturday, August 22nd, 2009 AT 1:15 PM
Tiny
MEEPER0701
  • MEMBER
  • 7 POSTS
No thats not what I mean. What happens if Im driving and they fail? Will the tires lock up?
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Saturday, August 22nd, 2009 AT 1:39 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
No its not gonna lock up-if the spider gear is gone in the pumpkin it will freewheel. If you're too worried about it get it inspected-it has a problem why gamble that might cause you to get stranded.
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Saturday, August 22nd, 2009 AT 1:44 PM
Tiny
MEEPER0701
  • MEMBER
  • 7 POSTS
Thank you for your help. Thats what I wanted to know :)
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Saturday, August 22nd, 2009 AT 2:25 PM

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