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    Results 41 to 46 of 46
    1. #41
      Join Date
      Apr 2001
      Location
      The City of Fountains
      Posts
      15,971
      Country Flag: United States
      Quote Originally Posted by 70chevellemalibu View Post
      Im miss matched for now.



      new falken azenis rt615k 255/40/17 in the front.
      older Nitto nt555 285/40/17 in the rear

      i bought the rims used and they came with bald fronts and newer rears.
      I've had those tires on my GTO before (not simultaneously) and I never had much road noise from the tires.

      Andrew
      1970 GTO Version 3.0
      1967 Cougar build
      GM High-Tech Performance feature
      My YouTube Channel Please Subscribe!
      Instagram @projectgattago
      Dr. EFI
      I deliver what EFI promises.
      Remote Holley EFI tuning.
      Please get in touch if I can be of service.

      "You were the gun, your voice was the trigger, your bravery was the barrel, your eyes were the bullets." ~ Her


    2. #42
      Join Date
      Sep 2011
      Location
      Southern Ontario
      Posts
      640
      Country Flag: Canada
      What happens if you shift to neutral while it’s happening?

    3. #43
      Join Date
      Apr 2013
      Posts
      87
      Country Flag: Canada
      I think it goes away.

      Went 80 shift to neutral noise went away; i had to do it a few times as when I left off the gas and shift into N the car slows down also.

      If this is in fact pinion noise like you suggest can I leave it this way? Where I live our speed limits are 60 mph so it’s not like I do 80 everyday. Is there premature wear happening that could result in a part in the diff breaking and causing tire lock up at highway speeds?
      1970 Chevelle Malibu 350 "70 Hell"
      - UMI - Kore3 - LS1 4 wheel discs - Budnik

    4. #44
      Join Date
      Apr 2001
      Location
      The City of Fountains
      Posts
      15,971
      Country Flag: United States
      This can easily be the ring and pinion making noise. R&P noise is odd, because it can manifest while under load, or off load, depending on the particular gear set.

      At this point I don't think that it is related to driveline angles, since you don't have a vibration.

      Andrew
      1970 GTO Version 3.0
      1967 Cougar build
      GM High-Tech Performance feature
      My YouTube Channel Please Subscribe!
      Instagram @projectgattago
      Dr. EFI
      I deliver what EFI promises.
      Remote Holley EFI tuning.
      Please get in touch if I can be of service.

      "You were the gun, your voice was the trigger, your bravery was the barrel, your eyes were the bullets." ~ Her

    5. #45
      Join Date
      Oct 2011
      Posts
      696
      You mentioned that your exhaust is touching the tranny cross member I believe. I wouldn’t discount that as being the source of your sound. It could be certain rpm produces certain vibration that translates to a harmonic noise in the car. Try to adjust so it’s not touching. Could be an easy fix. Maybe wrap the part that’s touching with exhaust insulation and the cross member as well just to create some sound barrier (just as a temporary fix).

    6. #46
      Join Date
      Sep 2011
      Location
      Southern Ontario
      Posts
      640
      Country Flag: Canada
      Quote Originally Posted by 70chevellemalibu View Post
      I think it goes away.

      Went 80 shift to neutral noise went away; i had to do it a few times as when I left off the gas and shift into N the car slows down also.

      If this is in fact pinion noise like you suggest can I leave it this way? Where I live our speed limits are 60 mph so it’s not like I do 80 everyday. Is there premature wear happening that could result in a part in the diff breaking and causing tire lock up at highway speeds?
      In my opinion you can leave it alone if that’s the problem. I drove my old 70 dart like that for years.

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