Differential oil change

Discussion in '4th Gen DIY' started by R.L.K., Apr 17, 2016.

  1. R.L.K.

    R.L.K. Supporting Member

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    Nothing dificult about this but I figured I'd post it up for anyone interested in comparison of their own oil change .

    My truck 2014 QC 4X4 5.7L 6 speed xsmn 3.55 differentials, rear Anti-spin (LSD)

    Milage.
    [​IMG]


    First I drove the truck about 40 miles to warm up oil and collect any metal debris on a small but powerful magnet I installed before I took off.

    [​IMG]

    The rear drain plug is a 14 mm hex .
    The filler port is a simple rubber plug.

    [​IMG][​IMG][​IMG]

    I removed the Maget draggi it towards the drain and drained all the oil through a paint strainer . Be ready it comes out in a hurry especially when warm / hot . About 2.5 qts.

    [​IMG]

    Almost nothing in the stainer, just small metal debris , the least amount I've ever seen from a rear differential. I've only hauled my bass boat aprox 2,500 lbs fully loaded , and one 8000lbs camper pull for 45 miles for a buddy .

    [​IMG]
    [​IMG]

    Next I ran a magnet everywhere I could and used it to pull out the remainder of the oil in the bottom of the case .

    [​IMG]

    Filled it up to spillover out the filler port with Redline 75W - 140, this oil already has the Anti-spin friction modifiers additive for the clutch type LSD/ Anti-spin if your truck is equipped with. This oil also can be used in the non Anti-spin / LSD differentials as well. ☆☆NOTE☆☆ On the back of the bottle of RL oil it says if you have chatter in your LDS to add additional friction modifier . I have no chatter with my LSD .

    [​IMG][​IMG]

    Once done I went to a large parking lot and did 10 ea full lock tight turns in both directions , no chatter for me .


    This is a test results sheet of popular gear oils , notice Redline is heads & shoulders above the rest .


    [​IMG]

    Hope this helps someone!
     
    Last edited: Aug 12, 2017
  2. Mpgrimm2

    Mpgrimm2 Preferred Vendor

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    Excellent write up. Just clocked 20K on my truck before dropping it off at the body shop.

    Can the RedLine be used in trucks without the LSD rear end like mine?
     
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  3. R.L.K.

    R.L.K. Supporting Member

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    Yes sir !
     
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  4. R.L.K.

    R.L.K. Supporting Member

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    Last edited: Apr 17, 2016
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  5. Hemi395

    Hemi395 Senior Member

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    Very nice write up RLK! Wish I had thought of using a magnet like that when I did mine!
     
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  6. arod412

    arod412 Senior Member

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    Good stuff. I'm currently at 31k miles...is this something that needs to be done, or its just optional?

    Truck name: Rampage
     
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  7. Hemi395

    Hemi395 Senior Member

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    It depends. I believe the "severe service" schedule States it needs to be changed at 20k. Wouldn't hurt to do it now it's easy to do...
     
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  8. R.L.K.

    R.L.K. Supporting Member

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    Thanks buddy , I believe the front end is aluminum? Gonna have to break out my aluminum magnet for the front case
     
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  9. Hemi395

    Hemi395 Senior Member

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    Ha yes it is aluminum. It's more difficult to fill than the rear as the steering rack is perfectly in the way but with a pump its not bad.

    Just changed my tcase fluid last weekend as well and that was pretty straightforward.
     
  10. R.L.K.

    R.L.K. Supporting Member

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    Could you elaborate with pics on the t case , I'll be doing this soon as well
     

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