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Ford Performance Friction Modifier (79-14 All)

Item 50377
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    Features, Video & Details

    • Perfect for Gear Swaps
    • Reduces Gear Whine and Chatter
    • 3.8 fl oz Bottle
    • For All 1979 to 2014 Mustangs

    Review & Installation Video

    Review & Install Video

    Perfect For Gear Swaps. Ford Racing's Friction Modifier is a specially formulated additive to provide smooth operation of clutch-type limited-slip differentials, perfect for gear swaps.

    Legendary Ford Racing Quality. When you're adding performance parts to your Pony, you can't go wrong by installing parts from the folks that know it best. Ford Racing's legendary quality ensures years of hassle-free use.

    Application.
    Ford Racing Friction Modifier is recommended for use in 1979 to 2014 Mustangs and is compatible with other brands of gear oil. One bottle is required for rear ends equipped with Ford traction-lock units.

    Fitment: 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 Details

    MPN# M-19546-A12

    CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

    What's in the Box
    • (1) 3.8 fluid oz bottle
    Tech Specs
    Will it fit my Mustang?
    • Boss 302 - 12, 13
    • Bullitt - 01, 08, 09
    • Cobra - 93, 94, 95, 96, 97, 98, 99, 00, 01, 03, 04
    • Cobra R - 93, 95, 00
    • GT - 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14
    • GT500 - 07, 08, 09, 10, 11, 12, 13, 14
    • LX - 87, 88, 89, 90, 91, 92, 93
    • Mach 1 - 03, 04
    • Other - 79, 80, 81, 82, 83, 84, 85, 86
    • V6 - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14

        Questions & Answers (9)

        5 Top Rated Questions

        I have a 2014 GT premium 5.0 with an automatic. Would you recommend the use of this product when changing the gear oil? Thank you.

        • We do recommend using friction modifier when changing your Mustangs ger oil!

        Helpful (7)

        Can i add this to my car without having done a gear change or replacing the gear oil

        • I would not recommend adding Ford Performance Friction Modifier unless you are changing your gear oil, it is added in as a ratio with gear oil.

        Helpful (2)

        Application I've scoured the internet looking for recommended methods of application and found nothing. Do I apply this gear by gear with a brush or do I just toss this in at the same time with the diff fluid?

        • It's designed to be poured directly in to transaxle case using a limited slip differential also referred to as a "Posi" meaning both wheels spin when power is applied. I would suggest pour entire bottle in first then pumping in your new fluid fill just below the fill hole plug. Check your year and model for specfication on filling level and fluid requirements. You may notice a faint noise from the differential for a few days until the new fluid and additive impregnate the clutch pads and it will go away nothing to worry about.

        Helpful (2) Show 1 more answer

        2007 GT 8.8 Rear axle My problem: only one wheel spins in high throttle. The clutch slips. Is this a thing that prevents clutch slip? Or is it only the noise that is reduced?

        • Unfortunately Ford Performance Friction Modifier is used to provide additional lubrication to the gears in the differential, however it would not prevent clutch slip. Clutch slip is usually the result of the clutch and flywheel unable to transfer torque to the drive-train. The only solution would be to replace the clutch and flywheel in most cases. Feel free to give our customer service department a call if you have any additional questions!

        Helpful (1)

        Can I use it with ford mustang ecoboost 2017?

        • No, this is designed for the 79-14 specifically.

        Helpful (0)
        Post Your Question
        4 More Questions
        This friction modifier is good just for differentials or you can add when you change gear oil in gear box to 0 answer
        Hello I have smal gear whine between 40-60 mls help this product? maybe 2 bottles 1 answer
        Is friction modifier good for a manual transmission gear box? 1 answer
        do i need to use this stuff i swapped gears about 1 year ago and used friction modifier.....i want to change rear end fluid now...do i need to use the friction modifier ??? thanks 1 answer

          Customer Reviews (82) Write a Review

          Ratings Summary

          4.8 out of 5 overall rating from 82 customers

          Installation Time: Less than 1 Hour

          Installation Cost: $100-$250





          • January 09, 2020

            4 2008 GT - Fbmustang2008 Installation Time: Less than 1 Hour

            OEM fluid

            Great product! OEM quality. Put in a 2008 Mustang GT/CS with over 250,000 miles after installing a Ford Performance Ring and Pinion Installation Kit w/ High Torque Bearing - 8.8 in. (11-14 V6; 86-14 V8, Excluding 13-14 GT500) and the Ford Performance Traction-LOK Limited Slip Differential w/ Carbon Discs - 31 Spline 8.8 in.

            Helpful (0)
          • December 29, 2019

            5 2003 GT - Bitty

            Quality

            There may be several others on the aftermarket but there’s nothing quite as good as the factory performance products for a traction lock Ford differential

            Helpful (0)
          • December 17, 2019

            5 2002 GT - ElvinC Installation Time: Less than 1 Hour

            Friction modifier

            Simple, easy, and affordable. Works just as described.

            Helpful (0)
          • December 15, 2019

            5 2006 GT - Eddie

            Works great!!!

            Another great purchase from American Muscle!! Rear end is now quiet as a mouse

            Helpful (0)
          • November 27, 2019

            5 2002 GT - JUAREZ Installation Time: Less than 1 Hour

            Ford Performance Friction Modifier

            The product seems it does it's job. Just added it to the differential. Not sure if it will makes a difference but I hope it will have an impact on the long run.

            Helpful (0)
          • October 26, 2019

            5 1993 GT - Trigr1 Installation Time: Afternoon

            Needed for install

            Needed for gear install ..........................................

            Helpful (0)
          • August 20, 2019

            5 2007 GT - ChristopherS Installation Time: Less than 1 Hour

            Great product

            Works as it should no problems. What can you really say about it.

            Helpful (0)
          • August 19, 2019

            5 2016 EcoBoost - Nelly90210 Installation Time: Less than 1 Hour

            Works as advertised

            Works great. It helped quiet down my rear differential

            Helpful (1)
          • May 23, 2019

            5 2007 GT - jestar06 Installation Time: Less than 1 Hour

            Ford Friction Modifier

            Worked as it is supposed to. I'm glad AM has products to not only make our mustangs look and perform better, but to keep them maintained and running top notch.

            Helpful (0)
          • May 22, 2019

            5 1989 GT - AnthonyT Installation Time: Afternoon

            best friction modifier

            Excellent product, no noise coming from the rear end after using this and all at a great price too.

            Helpful (0)
          • May 13, 2019

            5 2013 GT - MPNYC Installation Time: Less than 1 Hour

            Must have!

            This is a must have to keep your rear differential in good shape. Make sure the fluid you run does not have it already added.

            Helpful (0)
          • May 09, 2019

            5 2013 GT500 - Jacob Installation Time: Less than 1 Hour

            Additional friction modifier

            This really smoothes up the rear, add even when using a gear oil that has a modifier in it.

            Helpful (0)
          • May 09, 2019

            5 2014 V6 - CrazyCooter Installation Time: Less than 1 Hour

            Amazing

            This friction modifier is the bomb! Mix with a little Astroglide and you're set!

            Helpful (2)
          • April 23, 2019

            5 2014 GT - ZacharyS Installation Time: Shop Install Installation Cost: 0-$100

            Friction Modifier

            It was rad you guys got it for me quickly, even while out of stock , thank you! Oh , and I gained 100 horsepower! Lol

            Helpful (0)
          • April 23, 2019

            5 2013 GT - ChaseG Installation Time: Less than 1 Hour

            Must have

            You need this if you get the clutch and shim rebuild for your rear end to soak the carbon fiber clutch disks!

            Helpful (0)
          • March 25, 2019

            5 2007 V6 - TheRAP

            Recommended? Yes. Works? Yes!

            This lube additive is supposed to let a differential work without making a bunch of noise from what I read. Okay, I used it and guess what? No crazy noises!

            Helpful (0)
          • March 24, 2019

            4 1996 GT - TeamUgly

            Best price on the internet!

            Bought a gasket, gear oil and the Ford Performance Friction Modifier for the best combined at American Muscle

            Helpful (0)
          • March 23, 2019

            5 2007 GT - Swoopty5525 Installation Time: Less than 1 Hour

            Does what it should

            Works good and does what it should. C any go wrong with Ford performance friction Mod.

            Helpful (0)
          • March 18, 2019

            5 2013 GT - MichaelP Installation Time: Less than 1 Hour

            GREAT ADDITIVE

            Great product for all semi-posi's and positraction rear gears. Ford racing lubes work perfect

            Helpful (0)
          • March 08, 2019

            5 2007 GT - Lurch904 Installation Time: Less than 1 Hour

            Best friction modifier

            The best friction modifier on the market today. Let clutch packs soak overnight smells horrible but works the best .

            Helpful (0)

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