Rear end noise

Discussion in 'SRT Hellcat General Discussions' started by Bob Cat, Mar 29, 2016.

  1. Bob Cat

    Bob Cat Hellcat Member

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    At 5 mph, sharp L/R turn, bump or rub noise from rear end area. 2016. 6k AT. Anyone else had this issue?
     
  2. Angel

    Angel Gold Member

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    Mine makes a noise too. I think there was a thread on it and I believe they said it's the rear gears breaking in.
     
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  3. JollyRoger

    JollyRoger Gold Member

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    I've had a similar sound when making a very sharp turn at very low speed.
     
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  4. sgoyal

    sgoyal Gold Member

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    I've not noticed anything so far but going to pay attention.
     
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  5. themarshall

    themarshall Silver Member Hellcat Car Club Gold Supporting Member HCC Charter Member

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    Yo bobcat op. Most likely clutches breaking in. Stay on it if it gets worse see your Dodge dealer.
     
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  6. Bob Cat

    Bob Cat Hellcat Member

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    10-4. Will do. Thanks !!!
     
  7. Hubbs

    Hubbs Silver Member

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    It's not anything breaking in. It's a lack of friction modifier in the differential. Take it in and get them to put in the additive and you'll be good to go.

    This will only get worse if you leave it alone.
     
  8. Bob Cat

    Bob Cat Hellcat Member

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    Wonder if there's a TSB on the rear diff additive. ?
     
  9. Toolman_42

    Toolman_42 Gold Member

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    So is there suppose to be friction modifier added to the differential as part of the original build or is this a sometime needed sometimes not? Wrong differential fluid from the start?
     
  10. MABBRYFL30

    MABBRYFL30 NYS President Hellcat Car Club Gold Supporting Member

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    post your vin and check for TSBS just to be certain. I would want piece of mind
     
  11. Hubbs

    Hubbs Silver Member

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    I haven't seen a TSB yet. All the cars need it. Obviously not added correctly at the factory.
     
  12. usmc341

    usmc341 Gold Member

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    There's friction modifier already in the diff fluid for our LSD. That's why it has it's own special part#. Noise is annoying but normal for LSD's. It's the CF clutch plates rubbing together. I've had it on 2 Hellcats and my GT500. If they add extra modifier it may affect LSD operation. Find a parking lot and do some figure 8s. That sometimes quiets it. Except for that I'd leave it alone.
     
    Last edited: Apr 1, 2016
  13. Hubbs

    Hubbs Silver Member

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    We tried the parking lot thing and it got much louder. The dealer ended up draining and refilling. It's been good since.

    This has been a common LSD problem for decades. More/better additive usually fixes it.
     
  14. Bob Cat

    Bob Cat Hellcat Member

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    Why would it stop from just a drain and refill? Different or better lube than from the factory?
     
  15. usmc341

    usmc341 Gold Member

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    On my first car we did the drain/refill. Stopped it for a little while then it returned. Maybe you'll have better luck. Not sure why that would work since it's the exact same fluid, but hey whatever works.
     
    Last edited: Apr 1, 2016

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