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OFFICIAL 2nd gen 4x4 front differential bearing vibration thread

Discussion in '2nd Gen. Tacomas (2005-2015)' started by BenWA, Apr 17, 2011.

  1. May 6, 2015 at 8:57 AM
    #2341
    HB Taco

    HB Taco Well-Known Member

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    I had 37k mi on my lift with the vibe and my cv looked perfect. Go back a few pages and see my posts with pics about it. I also have about 2.5" lift. Other then the issue with the seal it was pretty straight forward
     
  2. May 6, 2015 at 6:01 PM
    #2342
    Pigpen

    Pigpen My truck is never clean

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    It could be the diff drop which is causing your problem. The way I understand it, The diff drop angles the diff and the lubricant is no longer able to adequately bathe the gears - wearing the gears and putting undue stress on them. This could explain why you only hear it in 4wd.
     
  3. May 6, 2015 at 6:31 PM
    #2343
    RCOTaco

    RCOTaco Long Time Lurker

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    Thanks to both of y'all! Hopefully I'll be alright!
     
  4. May 7, 2015 at 3:11 PM
    #2344
    TRoss

    TRoss Web Wheeler

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    I call bs.. Same argument goes for changing the rear pinon angle (up), aint gonna hurt a dang thing as far as carrier and pinion bearings go....its like a blender in there, its gonna get lubed! ...key being properly filled diffs.
     
  5. May 7, 2015 at 5:26 PM
    #2345
    Pigpen

    Pigpen My truck is never clean

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    It wouldn't be the first time I was wrong. I just know there were a bunch of 2nd gen guys who pulled out their diff drop. I have read many suggestions to not put one in a 2nd gen.
     
  6. May 7, 2015 at 6:19 PM
    #2346
    skootx

    skootx Well-Known Member

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    I have the diff drop and have no intention of removing it. Anything to help the CV angles is good IMHO. Yeah, shouldn't matter if you rotate the diff, it's still the same amount of oil covering the gears.
     
  7. May 7, 2015 at 7:00 PM
    #2347
    MTopp

    MTopp Professional bear handler

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    Differential drops don't do anything on second gens except rotate the differential. Does it help cv angles? Maybe less than an inch no more than that. Does it make it structurally weaker? Yes, just like any spacer type thing whether it be for wheels, lift etc.

    Also, many times the transmissions and differentials have not been filled properly by toyota, kind of crazy, but it has happened many times.
     
  8. May 8, 2015 at 8:25 AM
    #2348
    Fifthwind

    Fifthwind Master of None

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    I respectfully disagree with the emboldened phrase above.

    My diff drop spacers are larger than the original contact area of the differential mount, and to simplify, causes no stress riser to be created. The diameter for the bolt/screw is also small enough to prevent an unsupported lateral load.

    If the spacer has a smaller contact area, or allows for an unsupported lateral load, then your statement would be correct.

    The situation is different on suspension blocks, as a larger torsional moment is created while there is no increase in contact area, or additional lateral support for the U-bolts.

    You did manage to confuse me with the statement about the fluid levels.
     
  9. May 8, 2015 at 6:50 PM
    #2349
    MTopp

    MTopp Professional bear handler

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    True, but I believe 2 members have had broken differential mounts from using a drop kit while offroad. If they didn't have the kit it probably wouldn't have happened, but that's all speculation and very rare.

    The fluid thing is literally certain things are not filled properly right off the lot from Toyota
     
  10. May 12, 2015 at 1:49 PM
    #2350
    jasclair

    jasclair Well-Known Member

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    Anyone have a spare tool they can pass on or sell?
     
  11. May 14, 2015 at 7:22 AM
    #2351
    iflyils

    iflyils Well-Known Member

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    My 2 cents is since I have installed the Front Elocker I have had Zero Vibration and the benefits of a front locker!
     
  12. May 14, 2015 at 3:57 PM
    #2352
    MTopp

    MTopp Professional bear handler

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    Lol at double or triple the cost
     
  13. May 14, 2015 at 5:59 PM
    #2353
    skootx

    skootx Well-Known Member

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    SAS would fix the problem real good.
     
  14. May 15, 2015 at 5:16 AM
    #2354
    MTopp

    MTopp Professional bear handler

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    That too
     
  15. May 15, 2015 at 10:19 PM
    #2355
    jasclair

    jasclair Well-Known Member

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    How long does it take to to replace the needle bearing with product? And do you need the install tool?
     
  16. May 16, 2015 at 5:44 AM
    #2356
    jace1905

    jace1905 Member

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    Just installed lift approx. 3 weeks ago. Instantly had the roar from front end of my truck.replaced front wheel bearings which helped but did not eliminate the noise so I got the clamshell bushing from east cost gear supply and installed it....noise is gone. Great big thanks to chase and guys at Ecgs.
     
    ECGS likes this.
  17. May 16, 2015 at 6:19 AM
    #2357
    jace1905

    jace1905 Member

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    Oh and I must say that the help I have gotten from this and other threads on here is an awesome resource. Thanks to everyone
     
  18. May 16, 2015 at 6:03 PM
    #2358
    jasclair

    jasclair Well-Known Member

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    So I installed my differential drop kit an my tacomas vibration and noise is pretty much gone. I still feel it but just barely AnD only when I try to feel for it... Definitly recommend trying the diff drop to see if it helps.
     
  19. May 17, 2015 at 8:41 AM
    #2359
    05Moose

    05Moose Middle-Aged Member

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    Been there, done that. It'll slowly get worse, so it's a temporary fix.
     
  20. May 17, 2015 at 7:07 PM
    #2360
    jasclair

    jasclair Well-Known Member

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    Yup, you are right I spoke too soon... I can feel it getting worse. Still not as bad so I hope it doesn't get worse
     

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