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WTF is this beige goop inside my rear axle?

Discussion in 'General Tundra Discussion' started by Jrharvey02, Feb 10, 2020.

  1. Feb 10, 2020 at 3:21 PM
    #1
    Jrharvey02

    Jrharvey02 [OP] New Member

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    Truck threw ABS and Slip Indicator light yesterday (no cel). Research indicated a bad ABS wheel sensor. I wanted to try and clean them up before dropping a couple hundred bucks on a new sensor. Started w/ driver rear, pulled sensor from axle, it was nice and dry and a tad bit of surface rust I just dusted off. Went over to check the rear driver side, popped off the nut, pulled out the sensor and it is covered in this beige/brownish slop or goop or whatever the f#*> you wanna call it?!? Wtf....?

    About a month ago my rear diff breather had weeped some diff fluid around itself and onto the bell housing, I swapped it out with a new breather and drained front diff, rear diff and transfer case fluid (Mobil 1 75-90). Rear diff fluid was a bit dark but I wasn’t missing any fluid from the tiny bit that had somehow weeped onto my bell housing, don’t know what that was all about.

    Rear differential was replaced by Toyota less than 2 years ago when the original owner tagged a rock with the bell housing.

    first pic is the ABS sensor covered in this slop when I removed it.

    900A4F2B-FF78-4612-A586-C965AE528C11.jpg 438FF2CE-0058-4D05-8537-45E7484246CB.jpg
    you can see that goop down in that holeB7F7D613-C129-4952-A18D-90FC213AE8F6.jpg
     
    Last edited: Feb 10, 2020
  2. Feb 10, 2020 at 3:39 PM
    #2
    plumber802

    plumber802 New Member

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    Looks like water got in there somehow.
     
  3. Feb 10, 2020 at 3:47 PM
    #3
    huntertn

    huntertn New Member

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    Water - oil mixture
     
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  4. Feb 10, 2020 at 3:52 PM
    #4
    ZappBrannigan

    ZappBrannigan The mind is willing but the flesh is weak

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    Water. When oil mixes with water it turns into chocolate milkshake
     
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  5. Feb 10, 2020 at 4:41 PM
    #5
    Jrharvey02

    Jrharvey02 [OP] New Member

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    How in the world would water get inside there? What do I do about this? I know very little details about axles, if somebody wants to learn me, please....
     
  6. Feb 10, 2020 at 4:47 PM
    #6
    Monkeyballs

    Monkeyballs New Member

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    Did you perhaps launch a boat and back into the water kinda deep ? There is usually a vent on top of the rear end that will let water in if it gets over the top.
     
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  7. Feb 10, 2020 at 5:15 PM
    #7
    Jrharvey02

    Jrharvey02 [OP] New Member

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    No. Truck has never dropped a boat into the water. Previous owner didn’t (couldn’t tow; physical neck issues). He told me this and when I checked the trailer light hook-ups there was still di-electric grease covering the 4 & 7 pin connector (evidence supported his claim).

    The rear diff was replaced 5/18. I bought the truck 8/18. I can tell you I’ve never been anywhere near water with my axles since I’ve purchased and I highly doubt the previous owner, who couldn’t turn his neck (which forced him to sell truck) dipped it in water in the 3 months he had a new rear diff.

    I don’t know wtf is going on.
     
  8. Feb 10, 2020 at 5:16 PM
    #8
    huntertn

    huntertn New Member

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    If the diff fluid was not milky it is not a big issue. Wipe the sludge off the sensor. I would look at the O-Ring on the sensor and make sure it is not cut or twisted. You could change the O-Ring if you want.
     
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  9. Feb 10, 2020 at 5:17 PM
    #9
    Jrharvey02

    Jrharvey02 [OP] New Member

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    Why wasn’t my rear diff fluid milk shake when I drained and filled last month?
     
  10. Feb 10, 2020 at 5:19 PM
    #10
    Jrharvey02

    Jrharvey02 [OP] New Member

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    Weird thing is the o-ring on the opposite side, which looked great, has a beat up o-ring. The side with the problem, looks perfect and new.
     
  11. Feb 10, 2020 at 5:24 PM
    #11
    Jrharvey02

    Jrharvey02 [OP] New Member

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    And looking at my Toyota info. that’s because the passenger side ABS sensor was replaced with the rear diff and the driver side wasn’t. The passenger side with the problem has an abs sensor that’s 8 years newer.
     
  12. Feb 10, 2020 at 5:32 PM
    #12
    Jrharvey02

    Jrharvey02 [OP] New Member

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    I just stumbled on a trucker forum where somebody states that when they do diff repairs, they’ll steam clean the inside and unless the water is wiped out with a rag, water remains. Any truth to this?
     
  13. Feb 10, 2020 at 5:41 PM
    #13
    huntertn

    huntertn New Member

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    I was kinda wondering if they put a used housing it for the previous owner. The moisture that cause the milky look was from that repair/cleaning. If it were my truck I would probably clean up the milky side, change the O-Ring if it looked bad - if it looks ok put it back together and drive it for a few months or until you change the engine oil again and pull this sensor again. If there is not milky residue on it I would mark it up to the previous repair work.
     
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  14. Feb 10, 2020 at 6:02 PM
    #14
    Jrharvey02

    Jrharvey02 [OP] New Member

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    I would almost guarantee it’s a used housing, it’s slightly less than 2 years old and looks 10 (slight Colorado surface rust /mag chloride everywhere). I’ve never been stoked about the looks of it but since I wasn’t the one who dropped $4k, don’t think I could hassle the repairing dealership, it functions just fine.

    I feel like between the rear diff breather “weeping” the tiniest bit of fluid last month, plus my abs sensor tripping me off to milkshake in my axle now (which I assume is going to alleviate my abs sensor issue since I cleaned it), that my differential is trying to tell me something...seems a little too coincidental, but what the hell do i know...
     
  15. Feb 18, 2020 at 7:02 PM
    #15
    SuperWhite20

    SuperWhite20 New Member

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    Drain it, fill it, put a higher breather on it and drive it.
     

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