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Rear Diff fluid

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

  1. Jun 17, 2011 at 5:35 PM
    #1
    sechsgang

    sechsgang [OP] Well-Known Member

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    Hi all!
    Changed my diff fluids (front & rear) with M1 75W90 synth gear lube, and the rear diff took a good 3.5 quarts (instead of 3 as the manual says) until it came out of the fill hole.
    Anybody else seen this? Or do I have a bigger diff than all of you? ;)
     
  2. Jun 17, 2011 at 5:42 PM
    #2
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Your only supposed to put in 3 quarts. Too much oil can cause the fluid to cavitate,and thus cause the gears to over heat.
     
  3. Jun 17, 2011 at 5:46 PM
    #3
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    It happened to a friend of mine. On top of that, most people that know diffs, and lubrication will tell ya the same thing. IIRC, the FSM states not to over fill the diff because of it potentially over heating.
     
  4. Jun 17, 2011 at 5:46 PM
    #4
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Same reason you dont over fill a crank case....
     
  5. Jun 17, 2011 at 5:51 PM
    #5
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    another post on this issue:

    Some have also reported that oil can get into the breather, blocking it, and causing the axel seals to blow out....
     
  6. Jun 17, 2011 at 5:51 PM
    #6
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    4.10 gears, sliders, and lots of buttons.
    They are spinning when you drive.
     
  7. Jun 17, 2011 at 5:52 PM
    #7
    sechsgang

    sechsgang [OP] Well-Known Member

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    What happened in your friends case? I thought you are supposed to fill it until it starts sipping out of the fill hole. That's what I did. It was sure more than 3 quarts though.
     
  8. Jun 17, 2011 at 5:52 PM
    #8
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    4.10 gears, sliders, and lots of buttons.
    He over filled the diff, and burt up the gears.
     
  9. Jun 17, 2011 at 5:55 PM
    #9
    sechsgang

    sechsgang [OP] Well-Known Member

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    So basically you are not supposed to fill it until it starts coming out of the fill hole?
     
  10. Jun 17, 2011 at 5:56 PM
    #10
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    The FSM states 3 quarts.
     
  11. Jun 17, 2011 at 5:57 PM
    #11
    Yoytoda

    Yoytoda The Little Truck That Could

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    huh, i was always told to fill it till it runs out as well. every chiltons, haynes, clymers ive ever read said to fill till it comes out the fill hole...
     
  12. Jun 17, 2011 at 5:58 PM
    #12
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    4.10 gears, sliders, and lots of buttons.
    Try that on a new Chevy truck......(dont want to fuck up a Toyota)
     
  13. Jun 17, 2011 at 6:02 PM
    #13
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    4.10 gears, sliders, and lots of buttons.
    Some engines can be over filled in which the crank then hits the oil. Mostly older domestic engines however.
     
  14. Jun 17, 2011 at 6:03 PM
    #14
    Yoytoda

    Yoytoda The Little Truck That Could

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  15. Jun 17, 2011 at 6:10 PM
    #15
    sechsgang

    sechsgang [OP] Well-Known Member

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    I just went back and checked: there is 0.8qts left in bottle number 6, which means I used a total of 5.2qts instead of the recommended 4.6qts (=3.0+1.6) for both diffs. You guys think I should drain some out of it?
    My guess is that I used 3.4qts in the rear and 1.8qts in the front. Minus a little bit that of course came out before I got the plug back in.
    Reason for concern?
     
  16. Jun 17, 2011 at 6:11 PM
    #16
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    4.10 gears, sliders, and lots of buttons.
    A few ounces wont hurt it.
     
  17. Jun 17, 2011 at 6:24 PM
    #17
    ColtsTRD

    ColtsTRD .....

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  18. Jun 17, 2011 at 6:34 PM
    #18
    sechsgang

    sechsgang [OP] Well-Known Member

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    Thanks whipper, that was pretty cool.
    So bottom line is? Drain some or leave it? What would you do?
     
  19. Jun 17, 2011 at 6:50 PM
    #19
    BlueT

    BlueT Well-Known Member

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  20. Jun 17, 2011 at 6:54 PM
    #20
    BlueT

    BlueT Well-Known Member

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