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Differential fluid change - do I need friction modifier?

Discussion in 'Ford Raptor Problems and Questions Forum' started by Madcowranch, Feb 5, 2014.

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  1. Feb 5, 2014 at 5:56 PM #1
    Madcowranch

    Madcowranch Genetically Modified

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    I'm at Auto Zone. Gonna change rear diff fluid. What do I need?
     
  2. Feb 5, 2014 at 6:05 PM #2
    farman

    farman Full Access Member

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    3 quarts of 75w-140 synthetic for stock cover, 5 quarts for mag-hytec cover. I always buy one extra quart just in case. If you have stock cover need new silicone to seal it back up as well.
     
    Last edited: Feb 5, 2014
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  3. Feb 5, 2014 at 6:14 PM #3
    Madcowranch

    Madcowranch Genetically Modified

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    Awesome. Thank you!
     
  4. Feb 5, 2014 at 7:33 PM #4
    pirate air

    pirate air will plunder your booty Supporting Member

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    Don't forget the hookers and blow.
     
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  5. Feb 6, 2014 at 12:08 AM #5
    Madcowranch

    Madcowranch Genetically Modified

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    Hey Pirate, I got the canister purge valve on the engine ticking loudly, no Check Eng. light. Should I get a new one or just wait til it throws a light? Ford parts wants $60 for a new one.
     
  6. Feb 6, 2014 at 8:00 AM #6
    Humvee21

    Humvee21 FRF Addict

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    Just switch it out. Online Ford OEM is $20 IIRC. I have a spare that I will sell you for what I paid for it
     
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  7. Feb 6, 2014 at 8:27 AM #7
    Ruger

    Ruger FRF Addict

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    Hey, don't our differentials require some kind of special additive? Something about their limited slip design, if I remember right.
     
  8. Feb 6, 2014 at 10:18 AM #8
    The Car Stereo Company

    The Car Stereo Company aka nosbusa Supporting Vendor

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    are you still there? if you wait there a little longer, a few more people might chime in.......
     
  9. Feb 6, 2014 at 10:32 AM #9
    Humvee21

    Humvee21 FRF Addict

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    Sorry I was off with the price (bought this almost a year ago). But here's the cheapest $36 if you have Amazon prime: Amazon.com: Motorcraft CX-2369 Fuel Injection Auxiliary Valve: Automotive

    I paid roughly $40 for mine

    ---------- Post added at 10:32 AM ---------- Previous post was at 10:23 AM ----------
    This is what the owner's manual says about the front diff: 1.8L of Motorcraft SAE 80W-90
    Premium Rear Axle Lubricant

    and for the rear diff: 2.6L of Motorcraft SAE 75W-140
    Rear Synthetic Axle
     
  10. Feb 6, 2014 at 10:34 AM #10
    Madcowranch

    Madcowranch Genetically Modified

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    Ordered off of Rock Auto last night. Thanks Humvee.

    GFY Busa.

    Russ, I don't think we have LS diffs?
     
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