Rear end whine

Discussion in 'SRT Hellcat TSB's' started by want2, Apr 12, 2015.

  1. want2

    want2 Senior Hellcat Member

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    I have about 360 miles on the cat and am hearing a gear noise from the rear. This starts about 45mph in a easy drive situation. Let off on the gas and it stops. It will continue up to about 65 mph. After that, it may still be there but can't notice because of road noise. I have heard of other challengers with this situation but not 'Cats. Have others had this happen?
     
  2. hellcat1

    hellcat1 Gold Member

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    Mine has the same thing, been told it will go away soon, maybe after break in...
     
  3. StellasHC

    StellasHC Platinum Member

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    Mine started in the last 200 miles.. Maybe just a coincidence thats when break in was over and the drag radials went on..
     
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  4. SRT_HC_707

    SRT_HC_707 SRT_HC_707 Staff Member

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    I had gear whine from when I picked it up until about 350 miles. I've got just over 600 miles now. I was out today and didn't notice any gear whine. For me it's about 55 to 65 under very light throttle when I'll hear it.

    I'll have to take notice tomorrow when I'm driving. Supposed to be a nice day so planning on driving the cat...
     
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  5. wolfmann442

    wolfmann442 Silver Member

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    Mine does it too. It has 1200 miles.
     
  6. ChallengerDad

    ChallengerDad SRT Hellcat Moderator Staff Member Gold Supporting Member

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    The rear end whine is pretty common in the manual 6-speed.
    Some of the folks that were bothered by it switched out the rear-end gear oil and said the noise is less using RP 75W-140 Synthetic Gear Oil or Wolf's Head 85W-140 Gear Oil.
    My 2009 has made that whine since new, but I don't even notice it any more.

    I don't recall anyone complaining about it in an automatic with LSD.
     
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  7. Tammie

    Tammie SRT Hellcat Moderator Staff Member Gold Supporting Member

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    I don't notice it in my m6. Could be because I am focused on the supercharger whine. I'm going to pay more attention and see. :cool:
     
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  8. B5 Blue

    B5 Blue Platinum Member

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    Maybe you deaf like me:(
     
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  9. Tammie

    Tammie SRT Hellcat Moderator Staff Member Gold Supporting Member

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    Could be having the radio at 35. Lol
     
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  10. Bob Edly

    Bob Edly Hellcat Member

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    I just had mine out and heard the whine seamed to be at 35mph to 55-60mph. Not broke in though 122 miles. I had a Dana rebuilt 2 years ago and it whined for about 1200 miles.
     
  11. Colorado Hellcat

    Colorado Hellcat Silver Member

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    I've never really understood why proper break in procedures for the rear differentials are not listed in owners manuals. Esp. for the hellcat where there is great desire to do burnouts & hot rod it way before you should.

    This is a good tech article on how a ring & pinion should be broken in.

    New Gear Break-In

    Quote From Randy of Randy's Ring & Pinion. Of course we won't be towing with the Cat.

    " After driving the first 15 to 20 miles, stop and let the differential cool before proceeding. Keep the vehicle at speeds below 60 mph for the first 100 miles. I also recommend putting at least 500 miles on the new gear set before heavy use or towing. During the first 45 miles of towing, it helps to go about 15 miles at a time before stopping to let the differential cool for 15 minutes before continuing. This is necessary because not all of the gear tooth is making contact until it is heavily loaded. When towing, the teeth flex to contact completely, and cause the previously unloaded portion of the teeth to touch and work harden. It is very easy to damage the ring & pinion by overloading before the teeth are broken-in. If you take it easy on a new ring & pinion and keep it full of high quality oil, it will last a lot longer."
     
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  12. Tammie

    Tammie SRT Hellcat Moderator Staff Member Gold Supporting Member

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    Pretty similar to break in, which I did follow exact. I'm not hearing noise so maybe I did something right!:D
     
  13. B5 Blue

    B5 Blue Platinum Member

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    Don't blame ya there
     
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  14. Carnage

    Carnage SRT Hellcat Supercharged Moderator Staff Member Hellcat Car Club Gold Supporting Member HCC Charter Member

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    LOL old man
     
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  15. Tammie

    Tammie SRT Hellcat Moderator Staff Member Gold Supporting Member

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    Oh, you went there! This may not end well for you rookie! Lol image.jpg
     
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