Noticeable Vibration

Discussion in 'SRT Hellcat Performance' started by Drig, Mar 22, 2015.

  1. Drig

    Drig Hellcat Member

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    Ok so here's my dilemma after a couple 100 miles. I put nitto 555r 305's on the back, waited until break-in period and took my car up to 120mph. But I'm getting vibration starting at 117 mph and up consistent! Had the balance check and redone and still same issue. also checked the front. I guess I'm going to have to put the Pirellis back on and see if its still there, and go from there. What a pain!
     
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  2. Tammie

    Tammie SRT Hellcat Moderator Staff Member Gold Supporting Member

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    Interesting. Others have Nittos and I haven't heard any problems similar to this. Let us know if you still have the issue with the Pirellis. Thanks
     
  3. DrBuick

    DrBuick Gold Member

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    We're they just at blanced it road forced
     
  4. Dubya

    Dubya Silver Member

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    I wouldn't change a thing, I'd take it straight back to the dealer like it sits and have them work it out under warranty. All you did was change tires and you're beyond your break in period..no worries.
     
  5. Mike Canadian

    Mike Canadian Silver Member

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    Tires could be fine if your tire guy/balancer is calibrated. Might be a slight separation also occurring at high speed if the belts are pulling apart. I agree with putting the factory tires back on and back to the dealer for there diagnostic.
     
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  6. Drig

    Drig Hellcat Member

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    Do you mean like high speed balanced... No
    I don't think its the tires could it be the driveshaft its a 6 speed
     
  7. Drig

    Drig Hellcat Member

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    His balancers were calibrated 6 months ago and put them on two different ones to check both came up equal
     
  8. DrBuick

    DrBuick Gold Member

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    Road force is not high speed. I don't think its the shaft
     
  9. Drig

    Drig Hellcat Member

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    Ok just read up on road force balancer that makes senses!
     
  10. Drig

    Drig Hellcat Member

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    DrBuick what would make you think it's not the driveshaft?
     
    Last edited: Mar 22, 2015
  11. 1FSTCAT

    1FSTCAT The Punisher

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    and if it turns out to be the tires, get ready for a couple of hours of diagnostics fees. Switch back to your stock tires and roat test it, it the vibration remains...take it in, if not, problem solved.
     
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  12. Mike Canadian

    Mike Canadian Silver Member

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    I worked at Goodyear years ago and we would do on the car balancing for problem scenarios...back then it could be drums etc. These days I find even if the tires are sitting too long they will flat spot like the old belted tires. Put it back to OE and check it again at high speed and if you get caught just tell em that Mike said it was okay!
     
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  13. B5 Blue

    B5 Blue Platinum Member

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    If it does it at the SAME rpm it's not tires it's some reciprocating part so whatever the rpm you have this at 117mph do the same rpm in other gears
     
  14. Dubya

    Dubya Silver Member

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    I put 35x12.5's on my dually and had an issue with a popping in the front end shortly afterward. It took 3 or 4 trips to the dealer before they put a set of chassis ears on it and finally figured out where it was coming from. My tires likely caused the issue but my intermediate shaft was covered under warranty. Every case is different but that was my experience.
     
  15. SRT_HC_707

    SRT_HC_707 SRT_HC_707 Staff Member

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    Your tires aren't balanced at every speed. They are balanced for that range around 60MPH. I'm not suprised it's vibrating at 117. Has a lot to do with the tire construction etc.

    I used to not even balance my Nitto DR's as I couldn't keep the weights on the metal rims.
     
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