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Ford Racing diff cover puking oil out the vent!

Discussion in 'Driveline' started by olympic, Sep 13, 2019.

  1. olympic

    olympic Well-Known Member Established Member

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    20190912_200655.jpg

    Just what I always wanted, baked on diff oil on my polished exhaust! :mad: I read posts from other owners having the same problem and hoped I wouldn't but here it is. I was very careful to put the proper amount of oil in and not just fill it till it ran out the fill hole. This is 100% a design defect and and I'm not happy about it. Guess I'll be installing a catch can on my diff....lol! :rolleyes:
     
  2. ccq8le

    ccq8le Active Member Established Member

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    Is it the ford racing or another type like the LPW?
     
  3. olympic

    olympic Well-Known Member Established Member

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    Ford Racing. I purchased it through Maximum Motorsports because they machine it slightly to clear their aluminum diff mount.
     
  4. BlksvtCobra01

    BlksvtCobra01 Do it again and I'll make it real Established Member

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    Yup happened to me too. Don’t fill up till it runs out the hole. Shitty design on FRPP’s part.


    Sent from my iPhone using Tapatalk
     
  5. slo984now

    slo984now AKA 01yellerCobra Established Member

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    I think it takes just a little less. I want to say I put in 1.1-1.15 quarts last time. Of course it's awesome having extra gear oil laying around used in only one of my vehicles.

    Side note, has anyone tried to clean that stuff off? My cat back is currently out of the car and one of goals is to clean it before putting it back in the car.
     
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  6. BLOWN9646

    BLOWN9646 E85 COBRA Established Member

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    I put in about 1.4-1.5 qts when I installed my FRPP cover, no issues. So it should only take a little over a quart like mentioned above when changing fluid
     
  7. olympic

    olympic Well-Known Member Established Member

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    Hmm maybe I did put too much in, Amsoil site says 4.2 pints but after some research that appears to be for a SRA. I'll drain it out, and put 1.25-1.5q back in.

    If it's really baked on then only 2 things will touch it: oven cleaner or sandpaper.
     
  8. slo984now

    slo984now AKA 01yellerCobra Established Member

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    Most online charts are for the SRA. They don't know about the IRS I suppose. I'm pretty sure the Ford manual says 1.25 quarts give or take. I know I didn't put in that much last time.


    It's got a few hundred miles of cooking on it. One of those things I kept putting off and now I'm kicking myself for it.
     
  9. olympic

    olympic Well-Known Member Established Member

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    Just thought I'd post an update: after draining the diff and refilling with 1.25 quarts (including friction modifier) the diff has not puked out another drop of oil. I shoved a small plastic bottle onto the vent hose so I could see any leaked oil and there was none.
     
  10. IllCobra

    IllCobra Active Member Established Member

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    If you're up for the job, I would just wet sand it. My diff was leaking and stained a good section of my polished exhaust. Grabbed some sandpaper, a spray bottle with some dish soap and water and went to town. I just hit the area with the stains and got it done in a couple hours.
     
  11. Dave.O

    Dave.O Active Member Established Member

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    Make sure that bottle is vented so it doesn't build pressure when hot

    I had to install a catch can with both the stock and frpp covers. I open track this car so it does see higher than normal temps


    Sent from my iPhone using the svtperformance.com mobile app
     
  12. slo984now

    slo984now AKA 01yellerCobra Established Member

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    I did the oven cleaner trick and it cleaned everything off. A little polish afterwards and it was good.
     
  13. olympic

    olympic Well-Known Member Established Member

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    Yeah it's vented. I was going to remove it after testing but decided to leave it "just in case". It's just a small 8oz bottle so it fits above the diff and won't hurt anything if it falls out.
     

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