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Rear end howl/whine at 60mph....WTF to do????

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Chiloquin_Car_Care, Mar 6, 2019.

?

drive with the howl/whine?

  1. hell no....thats annoying

    5 vote(s)
    26.3%
  2. hell no....thats dangerous

    6 vote(s)
    31.6%
  3. who cares....jjust turn up the tunes & drive

    8 vote(s)
    42.1%
  1. Mar 6, 2019 at 6:06 PM
    #21
    Chiloquin_Car_Care

    Chiloquin_Car_Care [OP] 100mph 'til 100 years old

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    I found small metal flakes (1/8"-1/16" in diameter) during the last rear gear oil service attached to the drain magnet...never seen this before on any prior rear diff oil swap...Im pretty sure these flakes are from a worn roller bearing or many of them....what do you think??
     
  2. Mar 6, 2019 at 6:11 PM
    #22
    cfcarpenter

    cfcarpenter Well-Known Member

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    I would say so. I chased my tail on this once before on a 1st gen. Brand new bearing was junk from the factory. We ruled that out because it was new... I had a solid drive line made new wheel bearings, tires the list goes on. Same thing as you described finially pulled the diff and swapped the bearing and it was fixed.
     
  3. Mar 6, 2019 at 6:19 PM
    #23
    Chiloquin_Car_Care

    Chiloquin_Car_Care [OP] 100mph 'til 100 years old

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    thanks for your input buddy!
     
  4. Mar 6, 2019 at 6:21 PM
    #24
    Chiloquin_Car_Care

    Chiloquin_Car_Care [OP] 100mph 'til 100 years old

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    I cant wait to fix this & update the forum
    Im sure others are dealing with this & would love the insight
     
  5. Mar 6, 2019 at 6:22 PM
    #25
    cfcarpenter

    cfcarpenter Well-Known Member

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    I bet hopefully it fixes it
     
  6. Mar 7, 2019 at 7:23 AM
    #26
    Chiloquin_Car_Care

    Chiloquin_Car_Care [OP] 100mph 'til 100 years old

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    thanks to all for advice offered
     
  7. Mar 8, 2019 at 9:02 PM
    #27
    westport toyota

    westport toyota Well-Known Member

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    This happened to me. I did the ecgs swap. I drove mine forever with it like that. so annoying trying to diagnostic. push up on your drive shaft at the rear end. you'll see it move, a lot. Its not suppose to move at all. that's what sold me. When i'm under the truck now I just give it the test feels solid
     
  8. Mar 9, 2019 at 5:16 AM
    #28
    BadDogMax

    BadDogMax Well-Known Member

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    Don’t forget to let us know the results of the swap.
     
  9. Mar 13, 2019 at 7:20 AM
    #29
    Chiloquin_Car_Care

    Chiloquin_Car_Care [OP] 100mph 'til 100 years old

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    I disconnected the driveshaft at the diff flange & found no movement of the pinion gear spline/flange
    (I also tested for movement prior to disconnecting the driveshaft, which produced zero up/down/left/right play)

    so I am not having that occur on my issue

    but I do notice some play when I attempt to turn the flange with my hand (it rotates about 1/4")
    wondering if this is normal????
    note- I have both the rear wheels on the ground

    should there be any play or movement in the flange when I attempt to turn it?

    I believe this issue just started on my truck within the last 5-10k miles (I have 305k on my taco)
    is the movement in the flange a sign of a worn crush sleeve?
     
  10. Mar 13, 2019 at 7:28 AM
    #30
    Chiloquin_Car_Care

    Chiloquin_Car_Care [OP] 100mph 'til 100 years old

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    I did this yesterday....the rear diff flange/pinion spline rotates roughly 1/4" with my hand
    (I did it with ratchet first, as you described, which also produced play/rotation)
    should there be any rotation in the flange? (note- I have the truck on the ground, all wheels, when conducting this check)
     
    US Marine likes this.
  11. Mar 13, 2019 at 7:54 AM
    #31
    Chiloquin_Car_Care

    Chiloquin_Car_Care [OP] 100mph 'til 100 years old

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  12. Mar 13, 2019 at 8:15 AM
    #32
    cfcarpenter

    cfcarpenter Well-Known Member

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    That’s normal. It’s your backlash in your gears. Just because there is no up and down play doesn’t mean the bearing isn’t bad. Here are a few ideas.
    1. Have you drove around in 4 high? Maybe it’s not from the rear end, pretty common for the front diff needle bearing to go bad.
    2. Pull the rest of your driveline and drive in 4high (making the truck front wheel drive) this will take all the load off your rear end.
     
  13. Mar 13, 2019 at 8:21 AM
    #33
    Chiloquin_Car_Care

    Chiloquin_Car_Care [OP] 100mph 'til 100 years old

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    this past December, I replaced the front needle bearing with the ECGS bushing....so its not that
    (I have also replaced all 4 wheel bearings & front cv axles)

    is it safe to drive the truck with rear shaft removed? will that cause damage?
    I thought to do the same, but didnt want to fuck my truck up any further...lol
     
  14. Mar 13, 2019 at 8:24 AM
    #34
    cfcarpenter

    cfcarpenter Well-Known Member

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    Ok glad that’s covered than. Yea it’s fine as long as you pull the drive line completely out. Transfer case to axle. Make sure to not pull the slip joints apart unles you make a mark where to put them back together. The drive line is balanced and that will throw that off
     
    hx989 likes this.
  15. Mar 13, 2019 at 8:25 AM
    #35
    Chiloquin_Car_Care

    Chiloquin_Car_Care [OP] 100mph 'til 100 years old

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    I am finding many metal flakes in the diff fluid....which must be bearings
    I took the whole 3rd member out about a month ago....all the teeth on the ring/pinion/spiders looked fine as did the carrier bearings
    but there is no way to visually inspect the 2 pinion bearings as they are buried in the 3rd member

    when I had the 3rd member out, is there any way to check the pinion bearings on a bench test?
     
  16. Mar 13, 2019 at 8:26 AM
    #36
    hx989

    hx989 Church of @ODNAREM - Pacific Northwest Chapter

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    Perfectly fine because now the tcase can’t bind in turns and the front diff is open.
    Obviously you don’t wanna tow or haul heavy like that but I’ve done this more than once in cases of trail/off-road damage to the rear drive train
     
  17. Mar 13, 2019 at 8:28 AM
    #37
    Chiloquin_Car_Care

    Chiloquin_Car_Care [OP] 100mph 'til 100 years old

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    thanks for your reply/info!
     
  18. Mar 13, 2019 at 8:45 AM
    #38
    Chiloquin_Car_Care

    Chiloquin_Car_Care [OP] 100mph 'til 100 years old

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    I will admit....I am truly sick of trying to address this howl....what a PITA
    the old me would sell & run
    but I really wanna figure this out...the truck runs great aside from this howl
     
    Last edited: Mar 13, 2019 at 8:52 AM
  19. Mar 13, 2019 at 9:05 AM
    #39
    Muddinfun

    Muddinfun Well-Known Member

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    Jack it up, put jack stands under the axle, block the front wheels, listen to the bearings with a mechanics stethoscope while somebody else drives the truck.
     
  20. Mar 13, 2019 at 10:48 AM
    #40
    Chiloquin_Car_Care

    Chiloquin_Car_Care [OP] 100mph 'til 100 years old

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    another great test suggestion
    will do!
    thanks buddy
     
    Muddinfun likes this.

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