Oil leak out of the box.

Discussion in 'Tech Info' started by Limeybastard, Aug 26, 2015.

  1. charonblk07

    charonblk07 Senior Member

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    I've had that drip one both my trucks with 3 different transmissions and I've come to the conclusion that it's just something in the design of the engine. I've pulled the trans a few times and checked the inside of the bellhousing and the rear of the engine and it's always been clean.


    Since I'm boosted I found it's more pronounced when I've been in boost a lot and pressurized the crankscase but it's been a lot less of an issue since I installed a crank evac pump. My working theory is that it's weepage past the rear main seal in my particular case.
     
  2. 12vrunner

    12vrunner Senior Member

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    Hey i got my 2016 with 300 miles now and has same leak. I did setup a appointment to warranty did anyone get anything else told to them. If its cosmoline thats fine just my first new truck and leaks already trips me out.
     
  3. SHOOT2KILL

    SHOOT2KILL Senior Member

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    Mines been leaking there since new...2 bottom bolts were loose close to 1 full turn...Stopped for awhile...Then started again...Re-tightened the same 2 bolts again...If I drive like a granny there is NO LEAK...When I have to spin the motor up over 4k+ when merging onto the interstate, or prolonged highway drive @ 2500+ rpm towing, I have a drip on the driveway the next morning...My theory is higher rpm's are pushing the oil out....
     
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  4. 12vrunner

    12vrunner Senior Member

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    Ya crazy hoping its just the cosmoline. But we will see i guess im going to bring it to dealer anyway.
     
  5. Limeybastard

    Limeybastard Senior Member

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    Well that's what I thought when I noticed it under 1k miles when I bought it. Then noticed it all the way thru to 22k miles which it's currently on. Dealer says they didn't see anything. However during the last 2k miles since dealer visit I haven't noticed a weep or drip yet. Perhaps the tech tightened it? I believe it's the bolt closer to the passenger side.

    Mines never dripped on the garage floor., Just slightly wet as per the pictures I posted. It's definitely not engine oil in my case.

    Sent from my SM-G928T
     
  6. Tach_tech

    Tach_tech Senior Member

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    Slightly loose engine to transmission bolts would not cause any sort of leak, unless they were all loose enough to actually cause a gap between them which could cause the torque converter to slip out but if that happened there would be much worse problems.
     
  7. Limeybastard

    Limeybastard Senior Member

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    Last time I didn't change my engine oil until it was approx dark in color ( rarity for me ) engine oil was black almost. Yet the drip was tan in color. I even have a picture of it on a plastic applicator indicating that it was oil based as it never evaporated. Still , I'm not bothered about it that much, it's been noted on the system at my dealer so should the Tranny pack up within my 100K drive line warranty then I may have some recourse.

    Thanks for your input fella.

    Sent from my SM-G928T
     
  8. Tach_tech

    Tach_tech Senior Member

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    If you have a UV light you can shine it on the fluid. If it glows its transmission fluid. The 8 speed fluid has a dye in it that will glow. If it doesn't, its engine oil. Of course this only applies if you have the 8 speed.
     
  9. Limeybastard

    Limeybastard Senior Member

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    Yeah I do have a black light. But residue was already cleaned off by the time I learned of the stock UV dye in the tranny oil. The dealership did at the time however add UV dye to my engine . I wasn't even aware until I was doing an oil change a few days later. 20160808_231515.jpg 20160808_231542.jpg [​IMG] 20160808_231856.jpg

    Sent from my SM-G928T
     
  10. Tach_tech

    Tach_tech Senior Member

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    Lol they added dye to the oil? That kinda will make it hard to tell if it's transmission or engine now since they'll both have dye in them. They just may not have known about the dye in the 8 speed, not many techs do know that although they should.
     
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