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Ford Racing FR500S Differential - 31 Spline 8.8 in. (86-14 V8; 11-14 V6)

5 Reviews
Our Price

$714.99

  • Item #50300
  • MPN# M-4204-T31H

  • Market Price $857.99
  • You Save 17% ($143.00)
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Features
  • Used in the FR500S race car
  • Type T-2R Torsen Differential
  • High bias ratio of 4.0
  • Preloaded clutch
  • Perfect for street or track
  • 8.8"
  • Requires 31 spline axles
  • Fits 1986-2014 V8 and 2011-2014 V6
Description
FR500S. Does your stock factory rear end just leave you spinning your wheels? Then upgrade to the same exact differential used in the Ford Racing "FR500s" race car. This limited slip differential (lsd) uses a worm gear friction system that ensure your engine's power is transferred to the wheels for maximum traction.

Torsen T-2R Differential. Built off the T-2 differential, the Torsen T-2R uses friction enhancing plates that allows for improved mobility and traction even under the most extreme conditions. The T-2R is always active and responds instantly to torque feedback from all driving conditions.

Application. This Ford Racing FR500s 8.8" Differential will fit both solid axle and independent rear suspensions (IRS) equipped V8 Mustangs from 1986 to 2012 and 2011 to 2014 V6 Mustangs. Requires 31 spline axles.Application Note: 1986-2004 V8 Mustangs came factory equipped with 28 spline axles, except for 2003-2004 SVT Cobras which were 31 spline. All 2005 and newer V8 Mustangs come equipped with 31 spline axles.

Specifications:
  • 8.8" Limited Slip Differential
  • Preloaded Clutch
  • Will accept anti-lock exciter ring
  • Requires 31 spline axles
  • Requires 3 quarts Gear Oil
  • Requires 4 ounces of CM-19546-A1 friction modifier with initial fill
  • Fits solid or independent rear suspension

Technical Note. You will need to reuse your factory 8.8” gear set, or upgrade to a new set of our 8.8" rear gears for this Limited Slip Differential. No aftermarket gears are included. For normal driving conditions we recommend you use 75W 90 rear gear oil. This will give you the same oil weight as factory. For colder temps or race use try 75w 140.

Mustang Fitment: 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) Limited Slip Differential
Installation Info
Fitment
  • Boss 302 - 12, 13
  • Foxbody - 86, 87, 88, 89, 90, 91, 92, 93
  • Mach 1 - 03, 04
  • V6 - 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

Only fits Mustangs equipped with a 8.8" rear end and 31 spline axles

Most Helpful Reviews View All

Overall Rating 4.8/5
5/5
Let's Go Racing

Had my new FR 500S Differential installed in my 2012 Mustang GT. Took my car to the track at Buttonwillow Raceway near Bakersfield, Ca and it had tremendous hook up both in the turns and the straights.

Read More
Helpful (9) (1)

4/5
T2R differential

If you auto cross or road race your mustang this is a must have. I went from the T2 to the T2R and my inside wheel spin issues seem to have vanished. If you're on the fence between the two, I'd go with

Read More
Helpful (5) (0)

Customer Photos

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Q & A (1 Questions, 2 Answers) Ask a Question

Manual or Auto Does this work with both manual trans and auto?

rolnwhy55 Year: 2011 Model: V6

Good Question (0) (0)
Show 1 more answer Answer This Question

Reviews (5) Write a Review

  • 5 Stars .80 80%
  • 4 Stars .20 20%
  • 3 Stars 0 0%
  • 2 Stars 0 0%
  • 1 Stars 0 0%
4.8

out of 5 stars

5 Customers Recommend this Product

Installation Time:Shop Install

Installation Cost:$250-$500

  • Performance Gain: 5 5/5
  • Fit: 4.8 4.8/5
  • Bang For Your Buck: 4.8 4.8/5
Filter By Sort By
  • 5/5 Yes, I recommend this product

    April 28, 2012

    Let's Go Racing

    Had my new FR 500S Differential installed in my 2012 Mustang GT. Took my car to the track at Buttonwillow Raceway near Bakersfield, Ca and it had tremendous hook up both in the turns and the straights. My ability to pass other cars increased and it was and absolute pleasure to drive at the track and to and from the track. I would highly recommend this upgrade to anyone wanting to put more power to the pavement. It feels as if the differential spins much more freely than before as if there is nothing dragging or hindering it at all. Like your getting free horsepower.

    BLee403

    Year: 2012 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 2 So,Cal

    Helpful (9) (1)

  • 4/5 Yes, I recommend this product

    August 08, 2013

    T2R differential

    If you auto cross or road race your mustang this is a must have. I went from the T2 to the T2R and my inside wheel spin issues seem to have vanished. If you're on the fence between the two, I'd go with the T2R and be done with it.

    JohnH1775

    Year: 2011 Model: GT Driving Style: Race 'Stangs I have owned: 2 Blythe, CA, USA

    Helpful (5) (0)

  • 5/5 Yes, I recommend this product

    May 26, 2013

    Wow! This is a must for some people....

    I recently had this differential installed when the stock one was burned up from too much use with R-comp tires. The car now puts power down out of turns incredibly well, and it rotates like never before. It took me by surprise the first time I took a corner after I'd picked the car up. If you do any track or autocross work- look no further. Slicks WILL toast the stock diff. The torsen has no clutches to rebuild, so it *should* be a zero-wear item! Expensive price of entry, but worth every penny IMO. Get it now!

    csamsh1

    Year: 2012 Model: GT Driving Style: Race 'Stangs I have owned: 1 Oklahoma City, OK, USA

    Helpful (3) (0)

  • 5/5 Yes, I recommend this product

    October 01, 2014

    Excellent product

    Installed the FR500S this week along with new 3.55 gears and aluminum drive shaft. Still breaking in the gears, etc., so I don't have performance input at this time. The install went really well and the quality of the unit was excellent. Compared with the original differential this Torsen unit is a big improvement. It was installed in a 2011 3.7 that has twin turbos and loads of torque (in excess of 400 ft pounds to the wheels). Should hook up a lot better out of the corners now.

    MUSTANGTT

    Year: 2011 Model: V6 Driving Style: Race 'Stangs I have owned: 2 DFW Metro

    Helpful (2) (0)

  • 5/5 Yes, I recommend this product

    December 23, 2014

    Best money ever spent on a mod

    Car handles completely different. No longer clumsy around corners. Transfers every bit of torque from the driveshaft to the wheels with wait...here's the key "perfect instintaious differential action". Theriatically a zero wear item. This is the most ingenious LSD available. I am a repeat offender(customer) and this is by far the best money I have spent to date. It's no wonder these torsens come standard on the track pack 2015 mustangs and the earlier boss'. I wonder why those cars put down the best circuit and drag times compared to other variants?

    NicNak

    Year: 2007 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 1 Killeen, TX, USA

    Helpful (0) (0)

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