1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Faint oscillating noise/whine at 65+ mph

Discussion in '100-Series Cruisers' started by Hi Trek, Jul 25, 2005.

  1. Hi Trek

    Hi Trek

    Messages:
    26
    Likes Received:
    0
    Joined:
    Jul 13, 2005
    Location:
    Bay Area, CA
    Hello all,

    I've searched the boards fruitlessly for any information and hopefully someone may have a simple answer before I visit the stealership for further diagnosis.

    When I hit around 65mph, my new-to-me '01 LC starts to have a very faint, oscillating pitch and I can't tell exactly where it's coming from.

    As my speed increases, the pitch gets higher but the oscillation frequency remains the same. The sound disappears at 80+mph or it could be that the pitch gets so high that I can't hear it anymore. Also, I notice that the sound seems to only appear if I take my foot off the gas; when I step on the gas, the sound goes away.

    Downshifting or disengaging the OD has no effect.

    Since the pitch changes with speed but not when I downshift, I'm hoping it's not related to the transmission at all and maybe a wheel bearing or tire noise. Definitely not normal, right?

    Thoughts or ideas anyone? I've got about 90K on the clock if that helps any.

    Thanks a lot for any input.
     
  2. NMuzj100

    NMuzj100

    Messages:
    3,480
    Likes Received:
    31
    Joined:
    Sep 25, 2004
    Location:
    Gleneagle, CO
    Have your front wheel bearings received a repack? (recommended at 90k) If not then a repack with inspection would seem to be the first logical step.