Join Date: Jul 2009
Location: New York
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I suggest this..
Just up the rear of the car and support on Jack stands.
Pull off the skid plate that is located at the rear of drive shaft. Where it attached to the rear diff.
Pull out the (4) bolts that attach the drvie shaft to the rear diff.
Turn the yoke on the rear diff (where the drive shaft bolts up)
Watch tires. Make sure they both turn the same way. If one spins forward the other spins in revers your LSD is shot.
HOTE: Ron from Raw1perfromance.com informed me that in his experience a lot of 02 WRXs didn't come with rear LSD even some that were tagged as LSD were open diffs when we got them.. Could have been customers that swapped them or just not installed at factory, who knows..
There are plenty of diffs out there but make sure you match up the gear ratio. It's really not that hard to swapp the diff out yourself. Give Ron a call, he will hook you up with parts and help via phone.
It means that your Rear diff is NOT an LSD.. If your car origionally came with an LSD rear differnetial (which if you remember earlier I stated that some didn't) it is bad.. The 2002 WRX came with a Vicious (SP?) rear LSD which works via pressure plates, or clutch disks depends on what you want to call them. The plates have friction between them and lock the rear wheels together until you over power that frictions.
Man show, any open diff will make one wheel spin forward and one back wards, it how the spider gears are configured to allow one wheel to spin faster then the other so the car will turn..
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