How can I tell if my LSD gone bad.

You will find only one wheel is spinning.

 

Any whining/howling type noises as wheel speed increases? That can be a sign

 

bad LSD shows up during cornering especially in wet conditions. if you feel the wheels losing grip or jerking it might be a sign. the car should stay stable in corners and acceleration should be smooth My mate had a similar issue after 100k miles. After replacement, it was like new.

 

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   Uneven Tire Wear: Noticeable wear on one tire can indicate LSD issues.

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   Noise: Grinding, clunking, or whining sounds while turning or accelerating.

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   Poor Traction: Difficulty maintaining traction during acceleration, especially in turns.

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   Vibration: Excessive shaking or vibrations when cornering.

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   Burning Smell: A burnt smell due to overheating fluids.

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   Fluid Leaks: Visible leaks around the differential housing.

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   Hope this helps. :-)

 

I've seen Quaife has recently released a torsen LSD for mk3 RS in case you need one