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    Results 1 to 10 of 10
    1. #1
      Join Date
      Feb 2020
      Posts
      11

      New from Alberta Canada

      Hello from Alberta.
      I am just finishing up a 6 year build on my 68 RS. Ride Tech all around. 5.3 LS swap with FiTech ultimate LS and 4l60-e.
      Having issues with rear diff noise, new gear set (twice) I am now thinking my noise is being channeled into the car from the 4 Link?
      I will search this site and post on the appropriate thread.

      Thank you

      Doug

    2. #2
      Join Date
      May 2010
      Location
      kitchener,Ontario,Canada
      Posts
      2,156
      Country Flag: Canada
      whats the rear end 9" ? , 10 bolt ? 12 bolt ?
      Spinnin'my tires in life's fast lane

      Ryan Austin
      On twitter @raustinss
      On Instagram austinss70

    3. #3
      Join Date
      Feb 2020
      Posts
      11
      Hello Ryan, the diff is a 12 bolt Posi

    4. #4
      Join Date
      May 2010
      Location
      kitchener,Ontario,Canada
      Posts
      2,156
      Country Flag: Canada
      do you have access to a hoist ...run it thru the gears on a hoist ???

      Spinnin'my tires in life's fast lane

      Ryan Austin
      On twitter @raustinss
      On Instagram austinss70


    5. #5
      Join Date
      Feb 2020
      Posts
      11
      Yes I have a hoist, you can hear it, I added some butyl and MLV in the trunk yesterday in hopes it will dampen the noise, I haven't driven it since, hopefully tonight. I put several layers of dampening in the main body tub.
      I will report back on whether it was of any benefit.

    6. #6
      Join Date
      Feb 2020
      Posts
      11
      No noticeable change, drive and coast whine 45 to 60 MPH, classic signature.

    7. #7
      Join Date
      May 2010
      Location
      kitchener,Ontario,Canada
      Posts
      2,156
      Country Flag: Canada
      weird ,is it a gear whine or a bearing you think .... ( were all bearings changed when the different gear sets were changed )
      Spinnin'my tires in life's fast lane

      Ryan Austin
      On twitter @raustinss
      On Instagram austinss70

    8. #8
      Join Date
      Feb 2020
      Posts
      11
      Yes a gear whine, near a 100kph with a slight addition of power and the noise stops, then returns on coast.
      second set of new bearings as well.
      Motive tech support as well as my self attribute a lot to the rigid 4 link heim joints and coil over.

    9. #9
      Join Date
      Feb 2011
      Posts
      271
      What brand of gearset? Quality matters here. I picked the cheaper route (don't recall the brand) and I get a slight whine at cruise.
      70 GTO - Alum 5.3/4L80e, boosting this winter!

    10. #10
      Join Date
      Feb 2020
      Posts
      11
      Motive Gear (orange Box) terrible finish on the teeth