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ZF LSD

SECTOR

PCGB Member
Member
I am trying to find information on how to test a LSD to check on its functionality. I believe the item fitted is ZF item, when I purchased the car several years ago it was described as having a Motorsport 80% locking LSD. After a few years of competing with the car I feel it’s not operating as it used to do. I am lead to believe there are clutch plates installed and these may wear. If I jack the rear of the car up with both rear wheels of the ground and rotate one wheel forward, the wheel takes up about 25mm of slack then the opposite wheel rotates in the same direction. I understand this to be normal for a LSD but how do you test the strength / condition / operation of the LSD.
Thank you
 

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