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12-10-2012, 07:24 AM
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#1 (permalink) |
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Registered User
Join Date: Dec 2012
Posts: 23
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Differential or CV Joint
I have a standard 2.5L EJ25D 99 legacy outback. When I turn slowly and sharply my rear axle makes a clunking noise. As I make the turn it also "hops". Could it be a bad CV joint? I think it might be the differential but am wondering if anyone else experienced this. If it is the differential, does anyone know the final gear ratio for this model? Thanks
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12-10-2012, 08:08 AM
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#2 (permalink) |
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Join Date: Jan 2011
Location: PA
Car: 2006 Outback XT Limited
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Sounds a lot more like torque bind. Search for that term and you will find many threads with info and answers.
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Wilwood Superlite front calipers DBA slotted Legacy GT front rotors w/Carbotech 1541 front pads; Hawk HPS rear pads and SS hoses Grimmspeed Master Cylinder Brace KYB GR-2 struts (2000-2004 version on rear) Rallitek sway bars F&R + AVO rear sway bar reinforcement brackets JDM divorced stereo/HVAC controller, JVC DD stereo Last edited by rasterman; 12-10-2012 at 10:28 AM. Reason: removed dupe links |
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12-10-2012, 08:45 AM
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#3 (permalink) |
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Registered User
Join Date: Jun 2006
Location: Nepean ON Canada
Car: 07 OBW 2.5i Touring (SE) D-4AT
Posts: 6,922
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The AWD transfer system might be malfunctioning. Search here for "torque bind". There's a good number of discussions.
If it's a manual transmission, then the cause could well be a failed AWD viscous coupler. If it's an automatic, there's several possibilities. In the MT case, the only real fix is to replace the center differential/coupler. In the AT case, there have been instances where multiple ATF changes have resolved the problem, but it might not and a replacement/rebuild of the transfer valving and/or clutch is needed. |
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12-10-2012, 10:12 AM
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#4 (permalink) |
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Super Moderator
Join Date: May 2007
Location: Displaced to Chicago.
Car: 2003 2.5 4EAT with AWP.
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Please do not post identical threads in multiple forums, it really clutters things up.
I merged the 2 with responses and deleted the 3rd.
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2003 Outback: "Kaylee". 125,000 and counting. Mods: GE Nighthawk low beams, HIR1 9011 high beam upgrade, Nokya 25k yellow fog lights, Fumoto valve, 04 Forester XT shift knob. Basics: G-Oil Bio-based Advanced Full Synthetic 5w30, Purolater oil filter, STP air filter, Valvoline Maxlife Dex/Merc ATF, Valvoline Durablend 80w90, Michelin Primacy MXV4. Also: More rust and parking lot scars than I care to think about. |
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12-10-2012, 08:30 PM
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#6 (permalink) |
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Super Moderator
Join Date: May 2007
Location: Displaced to Chicago.
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Not likely.
Is your vehicle an auto? If so, how old is the ATF? Do all 4 tires match in wear and diameter? Put a fuse in the FWD slot under the hood. Does the vehicle still behave the same way?
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2003 Outback: "Kaylee". 125,000 and counting. Mods: GE Nighthawk low beams, HIR1 9011 high beam upgrade, Nokya 25k yellow fog lights, Fumoto valve, 04 Forester XT shift knob. Basics: G-Oil Bio-based Advanced Full Synthetic 5w30, Purolater oil filter, STP air filter, Valvoline Maxlife Dex/Merc ATF, Valvoline Durablend 80w90, Michelin Primacy MXV4. Also: More rust and parking lot scars than I care to think about. |
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12-11-2012, 08:35 AM
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#8 (permalink) |
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Registered User
Join Date: Jan 2004
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any work, mods or wrecks before this began?
99 is old enough to possibly have drivetrain problems anywhere in the system including rear axles and u-joints, etc.
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Time Flies Like an Arrow, Fruit Flies Like a Banana! |
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12-11-2012, 09:25 AM
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#9 (permalink) | |
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Registered User
Join Date: Jan 2011
Location: PA
Car: 2006 Outback XT Limited
Posts: 2,403
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Quote:
WBs in subarus tend to announce themselves with low howling noises at speed. It's actually harder to find one by feeling for radial play, at least until they are way gone.
__________________
Wilwood Superlite front calipers DBA slotted Legacy GT front rotors w/Carbotech 1541 front pads; Hawk HPS rear pads and SS hoses Grimmspeed Master Cylinder Brace KYB GR-2 struts (2000-2004 version on rear) Rallitek sway bars F&R + AVO rear sway bar reinforcement brackets JDM divorced stereo/HVAC controller, JVC DD stereo |
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