Rear End Noise when Spinning by Hand

Discussion in 'Transmission & Driveline Topics' started by Smiles 79, Aug 23, 2019.

  1. Smiles 79

    Smiles 79 Member

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    I'll have to go check that. It won't be much.
     
  2. Smiles 79

    Smiles 79 Member

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    Alright, got another pattern. I've attached the pictures, I'm Lookshaving kind of a hard time reading it. Any help is greatly appreciated!
     

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  3. big gear head

    big gear head Veteran Member

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    Drive side doesn't look too bad, but the coast side is not readable. Did you use an axle to turn everything at least 5 or 6 FULL TURNS in both directions? Also, you didn't answer post number 50 yet.
     
  4. Smiles 79

    Smiles 79 Member

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    Yes I did, 6 full turns using the axle. As for spinning the pinion, it doesn't free wheel by any means. Maybe half of a turn? I'm not positive and I'm not by the car right now.
     
  5. big gear head

    big gear head Veteran Member

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    Something is wrong with the coast side. The pattern is way off the heel end. The drive side looks like the pinion is not deep enough.
     
  6. Smiles 79

    Smiles 79 Member

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    Hey all, thanks for all the help with this.

    I shimmed the pinion all the way up to almost .060" and the pattern didn't seem to change much. That seemed like a pretty large amount of shims, so I started going the opposite way from the stock shim, and the pattern looks better I think. Thoughts?
     

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  7. big gear head

    big gear head Veteran Member

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    The coast side looks much better, but the drive side doesn't look deep enough. How does it sound now when you turn it? Did that noise go away?
     
  8. camaro71/holland

    camaro71/holland Veteran Member

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    Just to rule everything out..... the R&P were a set? You didn't mix two different sets, did you?
     
  9. Smiles 79

    Smiles 79 Member

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    Here is another video. Pinion preload is about 19 in lb, backlash is .007" and you saw the pattern I just posted. I'm using setup bearings if that makes a difference (the very first video was not).

    Some of the noise is my jackstands moving around while I was spinning the axle

     
  10. Smiles 79

    Smiles 79 Member

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    Nope, ring and pinion were a set.
     

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