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

Item 525032
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      Product Information

      Features, Description, Reviews, Specs & Installation

      Features

      • 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

      Description

      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.

      SR Performance

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

      MPN# 525032

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

      3.0

      Customer Reviews (3)

      Write a Review

      Ratings Summary

      3.0 out of 5 overall rating from 3 customers

      Installation Time: Weekend

      Installation Cost: $500-$1000





      • July 10, 2018

        1 1991 LX - Ford34 Installation Time: Shop Install

        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.

        Helpful (13)
      • June 25, 2018

        3 1990 LX - KingCallahan Installation Time: Shop Install Installation Cost: $500-$1000

        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.

        Helpful (12)
      • June 07, 2015

        5 1989 GT - MadMax Installation Time: Afternoon

        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

        Helpful (13)

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      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (2) 31 Spline Axles
      • (8) Wheel Studs
      • (2) Outer Axle Shaft Bearings
      • (2) Seals

      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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