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Milk shake diff fluid?

Discussion in 'Technical Chat' started by Malcolm3.4, Nov 13, 2011.

Page 2 of 4
  1. Nov 14, 2011 at 2:36 PM
    #21
    David K

    #21
    David K Well-Known Member

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    Yes, but past the axles...
     
    David K, Nov 14, 2011
    #21
  2. Nov 14, 2011 at 2:39 PM
    #22
    chris4x4

    #22
    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Nope. Try again.
     
    chris4x4, Nov 14, 2011
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  3. Nov 14, 2011 at 2:41 PM
    #23
    steve o 77

    #23
    steve o 77 braaap

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    As long as the diff can breathe both ways, water will not get in through the axle seals.
     
    steve o 77, Nov 14, 2011
    #23
  4. Nov 14, 2011 at 2:42 PM
    #24
    chris4x4

    #24
    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    There can be a slight vacuum after you have been driving, and you stop, let the vehicle cool, then pull the fill plug. However, if the vacuum was left un regulated, then the seals would fail. They are not designed to be presurized.
     
    chris4x4, Nov 14, 2011
    #24
  5. Nov 14, 2011 at 2:54 PM
    #25
    David K

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    David K Well-Known Member

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    Good answers above... except whippersnappers...

    Air in the Diff. is not pure oxygen... or nitrogen... or just gas... but also water vapor... heating and cooling of air makes water vapor and pressure changes... The spring check valve lets excess expanded gasses/ vapors out... but only to the point that the air pressure inside the diff. is once again EQUAL to the outside air pressure. Any vacuum developed would be tiny and soon erased by new gear oil and other vapors insude.

    Just do the mod. and don't worry about the stock breather!:D
     
    David K, Nov 14, 2011
    #25
  6. Nov 14, 2011 at 2:59 PM
    #26
    mjp2

    #26
    mjp2 Living vicariously through myself Moderator

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    My rear diff brings all the boys to the yard
    And they're like, "It's better than yours."
    Damn right, it's better than yours!

    As for that breather relocation thing, I could teach you...but I'd have to charge.
     
    mjp2, Nov 14, 2011
    #26
  7. Nov 14, 2011 at 3:14 PM
    #27
    98tacoma27

    #27
    98tacoma27 is going full "SANDWICH" Moderator

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    Some stuff. Not a lot, just some.
    If water is getting in, oil is getting out. Plain and simple.
     
    98tacoma27, Nov 14, 2011
    #27
  8. Nov 14, 2011 at 3:18 PM
    #28
    98tacoma27

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    98tacoma27 is going full "SANDWICH" Moderator

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    Some stuff. Not a lot, just some.
    Why do I have to do the mod if it keeps the water out?

    http://www.tacomaworld.com/forum/of...ve-traction-control-action-9.html#post1854953

    [​IMG]
     
    98tacoma27, Nov 14, 2011
    #28
  9. Nov 14, 2011 at 3:28 PM
    #29
    David K

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    David K Well-Known Member

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    The stock breather doesn't keep water out of the diff. That is why we do the mod.

    The stock breather itself won't let water through it and into the diff. The water is getting in at the axle seals... from a vacuum created when you drive into water.

    The mod. will break the vacuum using a 2 way breather up high.
     
    David K, Nov 14, 2011
    #29
  10. Nov 14, 2011 at 3:30 PM
    #30
    98tacoma27

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    98tacoma27 is going full "SANDWICH" Moderator

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    Some stuff. Not a lot, just some.
    You have no clue how oil seals work. Once fluid gets by in any direction, they're done.
     
    98tacoma27, Nov 14, 2011
    #30
  11. Nov 14, 2011 at 3:39 PM
    #31
    David K

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    David K Well-Known Member

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    Differential Breather Mod Light Bar: 4 Cree LED lamps Bilstein 5100s Ride Rite Air Bags

    Yes you are right... even though I have had it happen to me, and did the mod later... and what others here have reported...
     
    David K, Nov 14, 2011
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  12. Nov 14, 2011 at 3:39 PM
    #32
    David K

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    David K Well-Known Member

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    Not yet.. but try and read all of my words and not just parts out-of-context, like you reposted above ;)
     
    David K, Nov 14, 2011
    #32
  13. Nov 14, 2011 at 3:55 PM
    #33
    chris4x4

    #33
    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    This ^^^
     
    chris4x4, Nov 14, 2011
    #33
  14. Nov 14, 2011 at 3:58 PM
    #34
    David K

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    David K Well-Known Member

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    OK... See if this helps:

    1) The stock breather only lets expanding gasses out of the diff. by pushing open the spring check valve with more than normao pressure.

    2) The rubber and spring keeps the vent closed, otherwise. If underwater, there is even more pressure holding the rubber closed against the opening.

    A) When a vacuum exists inside the diff. then outside forces will push into the diff. at the axle seals. If underwater, water can get in there.

    B) The 2 way breather, mounted high, breaks the vacuum by being open to normal air pressure.

    SO... The stock breather is not letting water in, but it also is not letting air in... a vacuum is created, and contamination enters at the axle seals. It allows water to get in, but not through it.
     
    David K, Nov 14, 2011
    #34
  15. Nov 14, 2011 at 4:01 PM
    #35
    David K

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    David K Well-Known Member

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    This is why we need to do the mod, to stop fluid from getting in... :frusty:
     
    David K, Nov 14, 2011
    #35
  16. Nov 14, 2011 at 4:19 PM
    #36
    chris4x4

    #36
    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    If it was getting in thru the seals, My axel would be toast by now, with as many times as I have driven my truck thru water, and even left it submerged while I was boating. My oil always comes out clean when I change it, as I have extended the breather. Before the mod, After about 5 or so trips to the lake, the oil would have a bit of water in it.
     
    chris4x4, Nov 14, 2011
    #36
  17. Nov 14, 2011 at 4:22 PM
    #37
    98tacoma27

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    98tacoma27 is going full "SANDWICH" Moderator

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    Some stuff. Not a lot, just some.
    I've crossed 2 creeks twice in the last 2 weeks.
     
    98tacoma27, Nov 14, 2011
    #37
  18. Nov 15, 2011 at 12:59 AM
    #38
    David K

    #38
    David K Well-Known Member

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    Yes, exactly... before the mod water got in... After the mod, no water... That is what we all have been saying!:)
     
    David K, Nov 15, 2011
    #38
  19. Nov 15, 2011 at 1:03 AM
    #39
    David K

    #39
    David K Well-Known Member

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    It is fact... My just 5 month old, new truck rear diff. was contaminated after the deep mud water crossing, with the stock breather. The front diff. (with the 2 way, elevated breather) was fine.

    Now, I have a 2 way breather, elevated on the rear diff.
     
    David K, Nov 15, 2011
    #39
  20. Nov 15, 2011 at 5:14 AM
    #40
    98tacoma27

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    98tacoma27 is going full "SANDWICH" Moderator

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    Some stuff. Not a lot, just some.
    Which in no way proves your theory.
     
    98tacoma27, Nov 15, 2011
    #40
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