My truck front differential is spitting gear oil

Discussion in 'Trucks [ Eighteen Wheelers ]' started by 5K trucker, Sep 20, 2020.

  1. 5K trucker

    5K trucker Bobtail Member

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    Sep 19, 2020
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    Hi,Driver,my front gear box is spitting oil out from breather hole,I am losing 2 quart of oil every 12thousand miles,Can any driver help me with this problem, thanks,5k driver,
     
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  3. BoxCarKidd

    BoxCarKidd Road Train Member

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    Strange! Could you possibly have air going into the axle housing from the interaxle lock air piston?
    Most use air to engage the lock but some are opposite.
     
  4. Heavyd

    Heavyd Road Train Member

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    Hmm. I'd like to see a picture of what you are talking about just so we are all on the same page. I have never heard of such of thing before.
     
  5. Michael 247

    Michael 247 Light Load Member

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    Nov 20, 2017
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    I've had it happen 1 time on a new Truck.. Somehow a plastic thread protector cap was left in the hole that the breather threads into..when the gear oil got hot it pushed oil through the breather..
     
    Dave_in_AZ Thanks this.
  6. 5K trucker

    5K trucker Bobtail Member

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    Sep 19, 2020
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    Thanks,Michael,I will take breather hole and replace a new one,see if that help,thanks,5k
     
  7. 5K trucker

    5K trucker Bobtail Member

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    Sep 19, 2020
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    This truck have air going to front differential,can it be solinoid inside differential?,thanks,Box Car Kidd
     
    BoxCarKidd Thanks this.
  8. 5K trucker

    5K trucker Bobtail Member

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    Sep 19, 2020
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    Is Frei
    Thanks,HeavyD,when I left home,I fill it full,then I drove 4500 miles,I lose more half quarts,truck run fine,the gauge of differential goes up to 210 most,I used full synthetic,I will bring it home and let Truck gear check it out,thanks,5k
     
  9. BoxCarKidd

    BoxCarKidd Road Train Member

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    I will am not going to that the time to explain how it works right now But this in how to check it.
    Remove the axle breather. Chalk the wheels and have the engine running brakes released. Everything like you are going down the road except in neutral. Is air being slowly pushed out the vent hole? No air no problem.
     
    5K trucker and Dave_in_AZ Thank this.
  10. haycarter

    haycarter Road Train Member

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    Me Too..
     
    Heavyd and Dave_in_AZ Thank this.
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