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Old 11-12-2012, 11:58 PM   #1
xbmxxx
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Member#: 275155
Join Date: Feb 2011
Location: Arvada, CO
Vehicle:
2005 STi
Satin Black

Default What happened to my Diff?

2005 STi.

I ran it through my local shop because my ABS light came on. I had them do a 30 point inspection on it just to be sure everything was working good. Got a call later that my LSD had gone out and a new one from Subaru is 1700 bucks.

Here is where I am confused, I know that in an open diff car when one wheel is spun the opposite wheel will spin the opposite way. I also know that in a locked or limited slip diff car when one wheel is spun the other wheel will turn the same way. When I spin the drivers rear wheel the passenger wheel doesn't turn at all. huh?

They also said it wont hurt it to drive it it as is.
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Old 11-13-2012, 07:06 AM   #2
DCCDPro
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Location: Guelph, Ontario
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Was this a dealership? I would take it for another diagnosis.

Also, which diff? Front, Rear, center?
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Old 11-13-2012, 09:21 AM   #3
xbmxxx
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Join Date: Feb 2011
Location: Arvada, CO
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Satin Black

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Quote:
Originally Posted by DCCDPro View Post
Was this a dealership? I would take it for another diagnosis.

Also, which diff? Front, Rear, center?
No, it was an independent Subaru shop. The tech showed me what mine was doing on the lift, and then we compared it to a working Sti diff that was out of a car. On that one the axles turn the same way, and on mine the opposite wheel doesn't turn at all.
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Old 11-13-2012, 06:06 PM   #4
TheChisel
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Chapter/Region: SCIC
Location: San Diego
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This is the EXACT same symptom that I had when the rear differential on my 2005 STi gave out. When the car is driven as it should be, the clutch plates in the rear differential have a tendency to weaken fairly quick. They weren't set up all that tight to begin with.

There are rebuild kits out there, and if you are on a tight budget you may even consider looking into shimming the existing clutch plates. IIRC Rallispec offers a factory rebuild kit that has everything you need to make your diff better than new. There was a guy by the name of Powerlabs who did a writeup on the whole thing using that kit. Actually, google "PowerLabs' STI: Rear Diff Rebuilt". The cost wasn't anywhere near $1700.00, either.

As for myself, I got a deal on a Cusco Type RS that I couldn't refuse. U-turns are a bit noisy now
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