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Rear Diff. high pitch wine... :-/

Discussion in '2nd Gen. Tacomas (2005-2015)' started by bdb3011, Apr 5, 2018.

  1. Apr 5, 2018 at 8:57 AM
    #1
    bdb3011

    bdb3011 [OP] Active Member

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    Just looking for a little knowledge on how to proceed:

    I've had a moderately noticeable wine from the rear end for a while now (20,000 miles). Yesterday it went to a very loud (probably should wear ear plugs) wine above 50 to 55mph that is even worse at neutral torque.

    My assumption is it's the rear diff going. Correct?

    I also assume I should fix that ASAP. My questions for y'all are:

    Rebuild with new internals? Replace with used axle or parts? Do it myself or pay the labor? Total $$$ ?

    I'm pretty mechanically inclined, but I've never done this project on any vehicle before. I'm also not sure if this project would require and special tools such as pullers or bearing press etc...?

    Any advice or experiences would be very helpful.

    Thank you!
     
  2. Apr 5, 2018 at 10:03 AM
    #2
    Bebop

    Bebop Old fashion cowboy

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    It would be way easier to just swap out a whole diff assembly. This is what I would do. Then Rebuild my old one for fun.
     
  3. Apr 5, 2018 at 10:13 AM
    #3
    my_rtt_and_me

    my_rtt_and_me Member

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    first be 100% sure the noise is coming from your rear differential. I've seen this type of noise come from the carrier bearing on the driveline (not sure if you have one or not). If it is in fact the rear end it means the hard-facing on the gears has worn off so you'll need to replace the gears, typically everything else in there will be fine. i would not recommend swapping the gears yourself. setting the gear mesh perfectly is very important and directly related to the life of the gears. if set wrong new gears could last you as little as 500 miles....ask me how i know :frusty:
     
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  4. Apr 5, 2018 at 10:24 AM
    #4
    hanmee47

    hanmee47 Well-Known Member

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    Do the simple things first !

    Check oil in the rear pumpkin ! Check axle seals left and right rear to see if you are loosing fluid.

    Check the U joints
    Check the carrier bearing.
    Then if replacement is warranted, do as Bebop recommended : swap the whole axle Assy.
     
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  5. Apr 5, 2018 at 10:45 AM
    #5
    bdb3011

    bdb3011 [OP] Active Member

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    Sorry, should have mentioned that I did have the fluid changed about 2 months ago. No leaks reported. Carrier bearing... How do ya check that, just yard back and forth on the drive shaft?? I copy, entire axle assembly sounds more like something I could pull off on the lift at the neighbors. :)

    my_rtt_and_me : Good info, thank you. I'd much rather do things myself, however I know when I shouldn't, and it sounds like I shouldn't. :-/
     
  6. Apr 5, 2018 at 10:59 AM
    #6
    my_rtt_and_me

    my_rtt_and_me Member

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    take the drive shaft off and spin the carrier by hand to see if it makes noise. it should be silent. Ive had a "tight" carrier bearing with no sign of wear make a similar noise to what you're describing. however, if it is the carrier bearing, the noise wont change when coasting/under acceleration/ decel. if the noise changes under any of those its 100% the hard face on the gears
     
  7. Apr 5, 2018 at 11:03 AM
    #7
    bdb3011

    bdb3011 [OP] Active Member

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    Yes, it definitely changes with change in load on the drive system. The wine nearly disappears under deceleration when still in gear, same in neutral. It's loudest under neutral torque then diminishes slightly as you roll on the power. So, sounds like hard faces.... new gears time. :-/. ...or the whole axle assembly as mentioned.


     
  8. Apr 5, 2018 at 11:05 AM
    #8
    my_rtt_and_me

    my_rtt_and_me Member

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    yeah then its forsure the hard facing of the gears worn off on the drive side
     
  9. Apr 5, 2018 at 11:34 AM
    #9
    nd4spdbh

    nd4spdbh Well-Known Member

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    How many miles did you have on the fluid before you changed it? being a 2010 i bet it was north of 100k.

    Your pinion bearings are donzo which has taken out your ring and pinion gears. You changed the fluid which actually washed away the sludge in the bearing pockets making the bearings looser and making the noise worse.

    After you get things changed, run the break in oil for 5k miles... then change rear diff every 30k after that.
     
  10. Apr 5, 2018 at 11:35 AM
    #10
    hanmee47

    hanmee47 Well-Known Member

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    Drove my son's Jeep Grand Cherokee the other day and ran into the same issue.

    Howling noise when drive system is under torque, let off the gas+ noise disappears.

    Give it gas and load the drives system (Torque) and the howling noise returns.

    Put it on the rack, inspected drive train, found the forward drive shaft t, from transfer case to front pumpkin, had the fwd boot torn and foreign object damage inside . Replace drive shaft , all is well.

    Before deciding on a probably cause., make a thorough inspection of all possibilities.

    Good Luck !

    Hate to say it ; either way it will cost you $$
     
  11. Apr 5, 2018 at 11:37 AM
    #11
    Iamraiderpower

    Iamraiderpower Well-Known Member

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  12. Apr 5, 2018 at 2:35 PM
    #12
    bdb3011

    bdb3011 [OP] Active Member

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    Thanks for all the info, and for the link to the thread! Sorry i didn't do a good enough search before posting... Inspection time tonight.

    Any tips on where to find a reasonably priced rear assembly? Or parts?
     
  13. Apr 5, 2018 at 3:46 PM
    #13
    Bebop

    Bebop Old fashion cowboy

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    Junkyard?
     
  14. Apr 5, 2018 at 4:20 PM
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    nd4spdbh

    nd4spdbh Well-Known Member

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    Do yourself a favor. do it right one time, new ring, new pinion, new pinion bearings and diff bearings.
     
  15. Apr 5, 2018 at 5:11 PM
    #15
    excorcist

    excorcist Well-Known Member

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  16. Apr 5, 2018 at 5:14 PM
    #16
    excorcist

    excorcist Well-Known Member

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  17. Apr 5, 2018 at 6:43 PM
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    07 sport 4x4

    07 sport 4x4 Well-Known Member

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    My uncle has an 02 XJ with almost 300k on it, he’s replaced that front shaft multiple times.
     
  18. Apr 5, 2018 at 7:36 PM
    #18
    bdb3011

    bdb3011 [OP] Active Member

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    excorcist likes this.
  19. Apr 6, 2018 at 9:06 AM
    #19
    bdb3011

    bdb3011 [OP] Active Member

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    Any of you fine people know what the stock gear ratio on my 3rd member is??

    2010 Tacoma, SR5, V6, 6spd manual. No mods. No rear locker. Pretty basic little truck.
     
  20. Apr 6, 2018 at 9:10 AM
    #20
    excorcist

    excorcist Well-Known Member

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    Your axle code is on a sticker in the drivers door jamb. 4 digits - something like "A04B"

    here is how you decode it (copy and pasted from another thread):

    A = 8.0"/205mm
    B = 8.8"/225mm

    01 = 3.583:1
    02 = 4.100:1
    03 = 3.153:1
    04 = 3.727:1
    05 = 3.307:1
    06 = 4.300:1
    07 = 3.909:1

    A = Open
    B = E-Locker
    C = Limited Slip Differential
     
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