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Ford Performance Friction Modifier (79-14 All)

Market Price $11.54 You Save 5% ($0.55)

$10.99

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  • Item 50377
  • MPN# M-19546-A12

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Features & Details

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


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

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

Most Helpful Reviews

4/5
Great product.

The additive came in the mail and I put it in the next day. Great product.

Helpful (1)

5/5
3.8 OUNCES OF LIQUID WONDER!

WHAT AN AMAZING CURE FOR REAR DIFFERENTIAL NOISE, NOT SURE WHY FR FRICTION MODIFIER ISN'T ADDED FROM THE FACTORY!

Helpful (1)

Overall Rating 4.7 out of 5 stars
Read All 24 Reviews

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3 Questions / 4 Answers

Ask a Question

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?

SeminolePride

  • 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.

    RSM54

    Good Answer (3) (0)

Show 1 more answer Answer This Question I need this answered (1) (0)

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

papajohn

  • Yes. You will need a bottle of friction modifier at each gear oil change.

    BS

    Good Answer (1) (0)

Answer This Question I need this answered (0) (0)

Is friction modifier good for a manual transmission gear box?

Mushtang

  • We would that a friction modifier not be used in a transmission. If your transmission is in need of an additive, such as syncro-mesh, or any other additive, we would recommend it be manual transmission specific.

    AMJEFF

    Good Answer (0) (0)

Question Resolved

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Customer Reviews (24) Write a Review

Overall Rating 4.7

out of 5 stars

Installation Time:Less than 1 Hour

  • Performance Gain 4.476191 4.5
  • Fit 4.809524 4.8



  • 4/5

    Installation Time: Less than 1 Hour

    July 04, 2016

    Great product.

    The additive came in the mail and I put it in the next day. Great product.

    Silky06

    Year: 2006 Submodel: GT

    Helpful (1) (0)

  • 4/5

    Installation Time: Less than 1 Hour

    December 02, 2015

    Delmon

    A must when using a Auburn Differential. Eliminates the chatter during low speed turns. Just make sure if comes with the application cap. Mine had a regular screw on cap which made it difficult to insert into the plug on the differential. I had to pour it into a spray bottle and spray it into the differential which added to the time required. I took the car for a 150 mile drive and there was no chatter or vibration from the rear during the trip. I've been using this product for over 15 years.

    Quickdraw

    Year: 1994 Submodel: GT

    Helpful (1) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    February 25, 2014

    No more gear whine.

    Ford Racing Friction Modifier is a must for any gear swap or route gear fluid change. It makes a huge difference in avoid chatter and gear whine. If your going change your gear oil pick this up and do it right the first time!

    RSM54

    Year: 2006 Submodel: V6 Boston, MA, USA

    Helpful (1) (0)

  • 4/5

    Installation Time: Less than 1 Hour

    March 23, 2013

    This is a quality product

    I would recommend this product to anyone who is planning on install gears at some point in time.

    Cjackson

    Year: 2004 Submodel: GT Corbin, KY, USA

    Helpful (1) (0)

  • 4/5

    Installation Time: Afternoon

    February 11, 2013

    Changing differential oil? Buy this!

    This is something you want to buy along with your gear oil when swapping gears, or just doing maintenance with your differential. It will make sure that your trac-lok system works the way it was intended. No one wants a "One Tire Fire", spent a few extra dollars to buy this and make sure that doesnt happen to you.

    LOUISSIUOL

    Year: 2011 Submodel: GT pa

    Helpful (1) (0)

  • 5/5

    Installation Time: Afternoon

    January 19, 2013

    A must to do!!!

    I installed ford 4:10 gears on my 1987 ford mustang g.t,installed motorcraft gear fluid,and ford motorcraft friction modifier..This is a must install,it will save your gears in the long haul,preserves the gears,and fluid.You are crazy if you don't install the friction modifier additive

    Bluejean

    Year: 1987 Submodel: GT Parsippany Nj

    Helpful (1) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    December 22, 2012

    Did the Job!

    Rear end goes smooth with the fricition modifier in it. You're goong to need a funnel if you have an after market diff cover. Amd I recommend a mask and gloves because it stick stinks very bad. Great product from a great store!!!!!

    Manerd

    Year: 1989 Submodel: GT Iowa, USA

    Helpful (1) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    November 08, 2012

    3.8 OUNCES OF LIQUID WONDER!

    WHAT AN AMAZING CURE FOR REAR DIFFERENTIAL NOISE, NOT SURE WHY FR FRICTION MODIFIER ISN'T ADDED FROM THE FACTORY!

    Snakebit732

    Year: 2012 Submodel: GT500 EDISON,NJ

    Helpful (1) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    November 08, 2012

    Good Product!

    I have used several different friction modifiers in numerous vehicles. In my opinion, this one holds up better than the rest. After severe track conditions, the wear on the parts is less which means I do not have to replace major components as often.

    chood7

    Year: 2006 Submodel: GT TX

    Helpful (1) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    March 22, 2013

    Friction modifier

    Great product, and easy to put in. Feels like the rear end is rolling smoother and there is no noise. Both tires light every time now even when doing clockwise donuts. Good product ++

    GirthBrooks

    Year: 2000 Submodel: GT Kansas

    Helpful (1) (1)

  • 5/5

    Installation Time: Less than 1 Hour

    March 22, 2013

    Trusted brand

    My local shop that installs gears suggested that I use the Ford Racing Friction Modifier when going with my 3.73's. He stated that he's always had great service out of this product and uses it all the time instead of the other brands. I value his opinion since he's been setting rear-ends up for 30+ years and his word is good enough for me.

    FastGeezer

    Year: 2013 Submodel: GT Maryville, TN, USA

    Helpful (0) (1)

  • 5/5

    Installation Time: Less than 1 Hour

    November 16, 2016

    Works great

    Swapped my gears used royal purple cause it says you don't need modifier that it already has it but I still had a whine put some of this in there and.....BOOM!!! Whine was gone

    Williamk

    Year: 2006 Submodel: GT

    Helpful (0) (0)

  • 5/5

    September 26, 2016

    Must have for your posi

    It wasn't required for my application, because i used Royal Purple but for the price i added it anyway. A fair warning though, if your married do not leave or bring this bottle in the house as the odor is extreme and overbearing.

    Misterford

    Year: 2005 Submodel: GT

    Helpful (0) (0)

  • 5/5

    July 27, 2016

    Works great

    This product is perfect when re filling the diff , I highly recommend using it ! Helps with everything you do to the differential

    Moy

    Year: 1997 Submodel: Cobra

    Helpful (0) (0)

  • 5/5

    July 17, 2016

    Much needed

    Cheaper than the local the parts store. Not much to say on it.

    Travis

    Year: 2003 Submodel: Cobra

    Helpful (0) (0)

  • 4/5

    Installation Time: Less than 1 Hour

    March 21, 2016

    the cap it comes with is not that you show

    I got it but you show a easy to use cap but thats what I got .

    jdtogo

    Year: 2012 Submodel: GT

    Helpful (0) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    February 16, 2016

    Not bad

    Didn't come with a pour cap so be prepared to add it to your gear oil or have a seperate way to pour into your differential. Takes a little time to get spread in differential but smooth sailing so far!

    Slick

    Year: 2000 Submodel: GT Keller, Tx

    Helpful (0) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    February 15, 2016

    Ford FM

    Works as advertised! I used it with Royal purple Oil gear oil and rear end is smooth and quiet.

    CoyoteRR

    Year: 2014 Submodel: GT Naperville, IL

    Helpful (0) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    December 22, 2015

    great

    works absolutely great with the install of the 4.10 gears i got.

    KaitE

    Helpful (0) (0)

  • 5/5

    Installation Time: Afternoon

    June 26, 2015

    Just Right

    Exactly what the rear end needs for the factory traction loc

    Robert

    Year: 1986 Submodel: Other malvern, PA

    Helpful (0) (0)

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