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Ford 9" Gear Oil Replacement and Cleaning the Interior of the Housing

Discussion in 'Engines and Drivelines' started by Indycars, Jan 16, 2022.

  1. Indycars

    Indycars
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    I have never changed the fluid in the rear axle since I build the TBucket in 1979, so it
    was time to do so. I talked with GRT1999 (Gary) about a small problem I'm having
    where the car twitches a little entering a long sweeping corner on the highway. It's
    happens when the clutches in the Traction-Lok final begin slipping, until that happens
    the car wants to go straight. It's a minor annoyance and most people who driven the
    car don't even notice, but I do. Gary talked me into just changing the fluid and adding
    two bottle of friction modifier, instead of sending him the 3rd member.

    I found that a Lowe's two gallon bucket fits very nicely and keeps the dirt out and
    would allow painting if needed.



    FP02_LowesBucket_03172.jpg
     
  2. Hacker

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    my center section from Quick Performance came like that. Now I have a new shop seat:D
     
  3. old round fart

    old round fart
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    I expect that brass fill plug to be polished when it goes back in! Lol
     
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  4. Indycars

    Indycars
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    I'm wondering if I need to worry about the rear axle fluid leaking around the studs and along the threads?

    I know they came with copper washers, did you use them or did you do something else to seal the 3rd member?
     
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  5. lincolnuT

    lincolnuT
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    Copper washers on any I work on.........
     
  6. Indycars

    Indycars
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    Thanks !

    Still seems like there is a leak path along the threads and past the nut ? Just trying to understand.
     
  7. fletcherson

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    Did the friction modifier help? I had a similar issue with the rear end that I built for my IROC Z and was very pleasantly surprised when such a simple resolve actually worked.
     
  8. Indycars

    Indycars
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    The project has grown in scope and therefore has taken longer than I expected in the beginning. So at this point I have not driven the car to know if the problem is gone. Thanks for asking thou !!!

    I finally noticed after all these years that the rear drums were not exactly the same shape, so I decided to get new ones while I could. Well that lead to new springs and that lead to ..... etc. The brakes are nearly completely new down to the springs, shoes, wheels cylinders and drums.

    Then I figured out that Cerakote MC-5100 for polished aluminum is impervious to brake cleaners and also Acetone. I did the test below and I already had experience with acetone. This Cerakote feels like a non-stick skillet, it very slick and hard. So I coated the inside of the brake drums, wheel cylinders, axle retainer plate and nuts.

    Cerakote - CERAKOTE CLEAR - ALUMINUM

    FP01_Cerakote_MC5100_BrakeCleanerTest_03253.jpg
    FP01_Cerakote_MC5100_BrakeCleanerTest_03254.jpg

    FP06_CerakoteInsideDrum_03288.jpg
    While I had the chance I drilled the axle housing for a drain plug. I used this steel block to keep my drill straight.
    Drain Plug PN: Votex DP004 (1/2"-20 x 25mm)

    FP06_DrillGuideForDrainPlug_03142.jpg
    Got to have some magnets, so I added 4 Samarium Cobalt disk magnets and a magnet drain plug.

    SmCo Samarium Cobalt Disc Magnets - Applied Magnets - Magnet4less

    FP06_MagnetsInRearAxle_03276.jpg

    Also instead of painting where the wheel seats on the drum I used Cerakote there. Before the wheel would always pull the paint off the drum, I'm hoping this will solve that problem. I should be able to just spray Brakleen whenever I have the brakes open and it won't remove my coating. I'm planning on spraying my valve covers at some point, I'm really liking this coating.

    FP06_CerakoteRearBrakeAssembly_03299.jpg
    FP06_CerakoteRearBrakeAssembly_03294.jpg
    FP06_BrakeDrumCerakoteAndPainted_03287.jpg
    .
     
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  9. CheapT

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    May I ask where you bought the cerakote? The places I've found want you to be an applicator/ dealer or you can't buy it. I'd like to coat my manifold. It's not polished but I want it to stay clean and sparkly. What does everyone use to clean up their aluminum?
     
  10. Indycars

    Indycars
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    #10 Indycars, May 6, 2022
    Last edited: May 6, 2022
  11. CheapT

    CheapT
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    Thank you for the link. I'm thinking of using it on my intake manifold. It's not polished and I made the mistake of using simple green on it. It cleaned it but it's turned a bit grey. Going to try simple "Extreme Simple Green" It's formulated for cleaning gas, oil, and exhaust from aircraft aluminum. When it's cleaned up I want to coat it so it stays nice looking.
     
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  12. Indycars

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    Don't make a mistake during the application, nothing will take it off. I've tested with Acetone and brake fluid and neither one will even phase it. You would have to blast it off. But don't worry too much it's very easy to apply. Any runs will flow out.

    I've been going to the automotive paint store and have them put it in a rattle can, that way I get a good spray pattern.
     
  13. CheapT

    CheapT
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    that stuff reminds me of the old days. My brother a I sprayed some coating on my car back in the early 80's..nothing work take it off short of 60 grit. Also reminds me of painting my car in imrom. Got a bit of fish eye on the hood....2 hours with 120 wet and barely made a dent. gave up and buffed it out.
     
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