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SR Performance 8.8 Axles - 31 Spline 4 Lug (79-93 5.0L)

Market Price $295.99 You Save 12% ($34.90)
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  • Item 525032

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Ship to: Ashburn - 20149
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    Features & Details

    • 1541H High Manganese Steel Alloy
    • 31 Spline Axle
    • 4 X 4.25" - Four Lug Design
    • 29" Axle Length
    • Kit Includes Driver and Passenger Side Axles
    • Bearings, Seals and Studs Also Included
    • Fits 1979-1993 5.0L Mustangs with 8.8" Rears
    Performance Upgrade. If your running a heavily modified or forced induction Foxbody Mustang, your factory 28-spline axles might be too weak to take the additional punishment. But after installing a set of SR Performance 31-spline 1541H alloy steel axles you will be sure to get all your pony's power and torque firmly planted to the pavement - where it belongs.

    Built to Out Perform. SR Performance Axles are forged from premium quality 1541H high manganese steel alloy that is induction heat treated for an axle shaft that is stronger and much more durable than stock, making it perfect for high stress street and race applications.

    Application. This pair of SR Performance 4-Lug 31 Spline Axles are specifically designed for use on 1979 to 1993 5.0L V8 Mustangs that have upgraded to a 8.8" 31-spline LSD or Spool only.

    Application Note: 1979-2004 V8 Mustangs came factory equipped with 28 spline axles, except for 2003-2004 SVT Cobras which were 31 spline.

    Fitment: 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 Details

    CA Residents: Warning: California's Proposition 65

    What's in the Box
    • (2) 31 Spline Axles
    • (8) Wheel Studs
    • (2) Outer Axle Shaft Bearings
    • (2) Seals
    Installation Info
    Tech Specs
    • Splines: 31
    • Type: C-clip
    • Stud Pattern: 4 x 4.25"
    • Stud Type: 1/2" Press in
    • Length: 29.0 in
    • Material: 1541H alloy steel
    Will it fit my Mustang?
    • Cobra - 93
    • Cobra R - 93
    • GT - 87, 88, 89, 90, 91, 92, 93
    • LX - 87, 88, 89, 90, 91, 92, 93
    • Other - 79, 80, 81, 82, 83, 84, 85, 86

    Fits 8.8" rear gears with 31 spline LSD or Spool only.

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    Customer Reviews (3) Write a Review

    Overall Rating 3

    out of 5 stars

    Installation Time:Weekend

    Installation Cost:$500-$1000

    • Performance Gain 4.333333 4.3
    • Fit 2.666667 2.7



    • 1/5

      Installation Time: Shop Install

      July 10, 2018

      Fabrication need!

      I ordered these axles with the Ford racing diff. The passenger side would not go in to the housing enough to get the clip on. I had to take it to a machine shop and have it turned down in order to make it work. $125 later..... its in.

      Ford34

      Year: 1991 Submodel: LX

      Helpful (2)

    • 3/5

      Installation Time: Shop Install

      Installation Cost: $500-$1000

      June 25, 2018

      Not Plug and Play

      The Right Axle fit fine, but the Left Axle needed to be sent to a Machine Shop to grind a groove into it for it to work with a "Ford Performance FR500S Differential - 31 Spline 8.8 in." so that the C-Clip would hold it into place. So, these are good Axles if you don't mind spending another $150 at a machine shop to get them to fit properly.

      KingCallahan

      Year: 1990 Submodel: LX

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      June 07, 2015

      Great purchase!

      These were exactly what I needed to fit for my 3.73 posi carrier. The difference in launching is incredible and the four lugs allowed me to keep my Turbine wheels. Came nicely packed and arrived in a few days. Definitely recommend and will be purchasing from AM again

      MadMax

      Year: 1989 Submodel: GT Birmingham , AL

      Helpful (3)

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