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    #21
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    Mark_F's Car Details
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    Hmmmff... Took it a run at the weekend.

    Diff seems VERY noisy. It locks up fine, but it sounds like... a flintstone car? Like.. stone rolling on stone? Like a pestle and mortar? Very audible inside the car and its deffo the diff. Stripped the rear brakes off it as at first I thought it was them and the sound remains.

    Any suggestions before I remove it AGAIN. :( Could it just need a good run / few heat cycles?
     
     

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    #22
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    Quote Originally Posted by Mark_F View Post
    Hmmmff... Took it a run at the weekend.

    Diff seems VERY noisy. It locks up fine, but it sounds like... a flintstone car? Like.. stone rolling on stone? Like a pestle and mortar? Very audible inside the car and its deffo the diff. Stripped the rear brakes off it as at first I thought it was them and the sound remains.

    Any suggestions before I remove it AGAIN. :( Could it just need a good run / few heat cycles?
    Are you sure its the diff Mark? Did you at any point remove the rear shafts from the hub and disturb the wheelbearings?
     
     

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    #23
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    Mark_F's Car Details
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    Quote Originally Posted by steve23002 View Post
    Are you sure its the diff Mark? Did you at any point remove the rear shafts from the hub and disturb the wheelbearings?
    No, I didn't remove the shafts. I've been under the car, turning it by hand and I'm almost certain its the diff. I'll split the shafts today and try and confirm it.
     
     

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    #24
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    Yep, deffo the diff. Swapped the open diff back in earlier. Went a drive, the noise is gone.

    Could it be the fluid? I'm using Castrol SAF-XJ 75w-140.
     
     

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    Quote Originally Posted by Mark_F View Post
    Yep, deffo the diff. Swapped the open diff back in earlier. Went a drive, the noise is gone.

    Could it be the fluid? I'm using Castrol SAF-XJ 75w-140.
    Thats the correct oil for BMW LSD's Mark...
    Sounds like you may have bought a buggered diff...
     
     

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    #26
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    Quote Originally Posted by steve23002 View Post
    Just make sure you DONT get the M3 evo diff. They require a prop and rear subfame change...
    Just for reference, you wouldn't need to change the prop as well. The prop is different on the Evo purely because of the longer 6 speed box. I have a M3 Evo with 5 speed box and 5 speed prop
     
     

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    #27
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    Quote Originally Posted by Tommy Lee View Post
    Just for reference, you wouldn't need to change the prop as well. The prop is different on the Evo purely because of the longer 6 speed box. I have a M3 Evo with 5 speed box and 5 speed prop
    ..........
     
     

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