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Moan...or maybe a Buzz

Discussion in '1st Gen Tundras (2000-2006)' started by athawk11, Aug 30, 2018.

  1. Aug 30, 2018 at 9:11 AM
    #1
    athawk11

    athawk11 [OP] New Member

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    Hello,

    2002 Toyota Tundra extra-cab. 234,000 miles. Dry Colorado climate. I’m the original owner. Has always been garaged. Well maintained. Mostly by me.

    I’ve replaced most of the items that normally wear out. Belts, pulley tensioner, u-joints, brakes, fluids, drive shaft hanger bearing, etc. This has been the most trouble free vehicle I have owned.

    The truck developed a vibration a few years ago. Noticed only at around 70MPH while accelerating, then would go away when accelerating past 74-75MPH and would not vibrate during deceleration. I replaced the drive shaft hanger bearing and the rear u-joint. The vibration was gone for the next 40,000 miles, but then returned. I didn’t have time to dig into it, so I had a shop rebuild the rear drive shaft with all new joints and hanger bearing. The vibration was gone for the first 500 miles.

    It came back, but this time it was different. It wasn’t as much a vibration as it was a moan…or a low buzz. It happens at the same speed (70MPH), but doesn’t go away as the speed climbs past 70MPH while accelerating. Also new is it now moans during deceleration until lower speeds are reached (65MPH or lower), but is quiet as a mouse in that short zone between acceleration and deceleration. This leads me to believe that it’s not a wheel bearing, but I don’t know. I’ve never lost a wheel bearing on any of my vehicles (dry Colorado climate), so I have nothing to compare it to.

    There is enough difference that I’m not sure if I’m still having a driveshaft issue, or this is something different all together. Any thoughts are appreciated.

    Thanks,
    Tim
     
  2. Sep 3, 2018 at 8:08 AM
    #2
    athawk11

    athawk11 [OP] New Member

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    Yep, I'm mystified by this too. :boom:
     
  3. Sep 3, 2018 at 9:04 AM
    #3
    Casper421

    Casper421 Adventure in a 1st gen

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  4. Sep 3, 2018 at 9:05 AM
    #4
    Tierhog

    Tierhog New Member

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    Good description, but thats a tough one. I would create a list of all repairs performed and a second list of maintenance "repairs" and cross reference those lists with the scheduled maintenance book. Would you repack wheel bearings at a quarter of a million miles? I'd say Yes. Any serviceable items that surround the driveshaft that may have been neglected?

    I'm afraid your going to to have to use your reverse engineering knowledge and some labor to find this devious little hide and seek problem.

    *Just read that wheel bearing in non serviceable and generally fail 100-200k
    Don't know that I would take it as gospel, but sounds reasonable.
     
  5. Sep 3, 2018 at 12:25 PM
    #5
    ColoradoTJ

    ColoradoTJ #WAISTBAND Staff Member

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    Colorado
    Check driveshaft balance, yoke runout, joints could be bad. Have you rotated your driveshaft or reinstalled it in the factory location by marking it?

    Wheel bearings can go anytime.

    Does placing the truck in 4wd help?
     
  6. Sep 7, 2018 at 7:08 PM
    #6
    TX-TRD1stGEN

    TX-TRD1stGEN ...

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    South East Texas
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    Can you tell a difference when you turn left or right (shift weight on by one side or the other) .
     

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