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Old 02-18-2013, 12:27 AM   #1
Scooby Newbie
Member#: 142625
Join Date: Mar 2007
Location: Albuquerque, NM
2002 WRX


I had a whining sound on deceleration and from 40-60mph and I narrowed it down to the center dif. I removed it today and I need a little advice concerning the viscous coupling.

There is a little discoloration from heat but it's not to bad. A large ring is damaged and there were loose pieces floating around the dif. What is this ring for? Is it part of the viscous coupling? Is the viscous coupling supposed to spin freely or with little effort. The gears in mine seem to be stuck is this normal? I haven't put much torque on them but it seems like I shouldn't have to.

Are there any other ways to diagnose the VC?

Links to images below.


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Last edited by Evile; 02-18-2013 at 12:32 AM.
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Old 02-18-2013, 03:37 AM   #2
FuJi K
Scooby Guru
Member#: 3687
Join Date: Jan 2001
Chapter/Region: MWSOC
Location: St. Paul, MN
MY99 GF4 JDM 6spd
NF Performance


And another one goes.... Go to Subaru and buy a new one. It's only $600. It'll have more viscous locking since it'll be new. Stuck the new one in and drive for another 150k miles
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