WIN $5,000 For Your Mustang! Enter Now
Talk to a Mustang Expert
Mon-Thu 8:30a-11p, Fri-Sun 8:30a-9p

Free Shipping on Everything. Seriously. Details

Yukon Gear Duragrip Posi Rear Differential - 28 Spline 8.8 in. (86-04 V8)

Market Price $559.99 You Save 11% ($60.99)
Our Price


FREE Shipping
  • Item 21611
  • MPN# YDGF8.8-28-1

In Stock Ships same business day. Choose options to add to cart

Features & Details

  • Put All Your Power to the Pavement
  • Assembled 8.8" Limited Slip Differential
  • Heavy Duty - Nodular Case with Forged 4320 Internals
  • Composite Clutches Included
  • Requires 28 Spline Axles
  • Fits 1986-2004 V8 Mustangs (Excludes 1999-2004 SVT Cobra)
Duragrip Posi Differential. Stop doing those ridiculous one wheel burn outs by upgrading to a Yukon 8.8in 28 Spline Duragrip Posi Differential from AmericanMuscle. A Limited Slip Differential (LSD) sometimes referred to as a "Posi" will allow both rear wheels to plant the power to the pavement giving you better traction and more impressive burnouts.

Heavy Duty. Featuring a case constructed from nodular iron, this Yukon Gear Duragrip Limited Slip Differential boast forged 4320 steel internals and composite clutches for dependable heavy duty performance and long life.

Application. This 8.8" Yukon Gear Duragrip Posi Differential will fit solid axle suspensions equipped V8 Mustangs from 1986 to 2004, including GT, Bullitt, and Mach 1 Models. Requires use of 28 spline axles. (Will not fit 1999-2004 SVT Cobra).

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.

Technical Note. You will need to reuse your factory 8.8” gear set, or upgrade to a set of our 8.8" rear gears required 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.

Fitment: 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 Details

What's in the Box
  • (1) 8.8" Limited Slip Differential
Installation Info
Tech Specs


  • 8.8" Limited Slip Differential
  • Heavy Duty
  • 10 bolt cover
  • Requires 28 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
Will it fit my Mustang?
  • Bullitt - 01
  • Foxbody - 86, 87, 88, 89, 90, 91, 92, 93
  • Mach 1 - 03, 04
  • Cobra - 94, 95, 96, 97, 98
  • GT - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04

Fits Mustangs equipped with a 8.8" rear end. Will not fit 1999-2004 SVT Cobras with the IRS.

Customer Photos (1) Submit Your Photo

View 1 Photo

You Might Also Like

3 Questions / 6 Answers

Ask a Question

About how much would it cost to have a shop install this? What would be a reasonable price?


  • It will need the new side bearings and cups, 10 new ring to pinion bolts. Synthetic 85-140 gear oil. Some shops will gouge you $350 to $400. Best to find a FORD mechanic that does it on the side at home. I get $275 . The ford garage I work at gets $450


    Helpful (0)

Answer This Question

Trac Lock switch Will this Differential still allow me to use my Trac Lock switch?


  • Yes. You will be able to function your trac lock switch as normal. This upgrade is a step up and much stronger!


    Helpful (0)

Answer This Question

fitment will this fit on a 98 mustang v6 that has 28 spline 8.8in axles?


  • Yes. As long as it has the 21 spline axles then this will work.


    Helpful (0)

Show 3 more answers

More Products You Might Like

Customer Reviews (3) Write a Review

Overall Rating 4.7

out of 5 stars

Installation Time:Shop Install

Installation Cost:$250-$500

  • Performance Gain 4.666667 4.7
  • Fit 5 5

  • 4/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    November 26, 2013


    Well my stang is 13 years old and the rear diff was not working properly I ended up doing a couple of ridiculous one wheel burnouts and that is never a good sign specially when it comes to LSD. So I search around the Internet trying to find a solution and then I found This LSD 28 spline by YUKON at AM I love the grip the car handles much better throw rough cornering, lunches much faster than before overall is great I have grip all day long and I enjoy the 11 looking burnouts.


    Year: 2000 Submodel: GT Sabana Grande, 00637, Puerto Rico

    Helpful (4)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    July 09, 2013


    Needed gears done in my 99 Cobra and I bought this as an upgrade to the stock ford unit. I honestly didn't know what I was missing until this thing went in; talk about grip on all kinds of surfaces and horrible roads! If you are going to stick with the stock 28 spline axles then this unit is excellent bang for the buck at $350. I though I had grip before and I see how wrong I was, the Ford unit has nothing on this!


    Year: 1999 Submodel: Cobra Cambridge, UK

    Helpful (4)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $1000+

    June 20, 2014

    Superior product at a great price!

    I was impressed with the service leading up to the sell! Product was a great upgrade to my 2000 mustang GT. I will enjoy this product for years to come! Very durable build and you can see the quality!


    Year: 2000 Submodel: GT Jonesville, SC 29353, USA

    Helpful (1)

Related Mustang Categories