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Eaton Detroit Locker; 31 Spline 8.8-Inch (11-14 V6; 86-14 V8, Excluding 13-14 GT500)

Item 525582
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      Product Information

      Features, Description, Reviews, Specs & Installation


      • Put the Power to the Pavement
      • Assembled 8.8" Detroit Locker Differential
      • 100% Automatic Locking Traction
      • Wheel Speed Sensitive Mechanism
      • Heavy Duty Construction
      • Requires 31 Spline Axles
      • Fits 1986-2014 V8 and 2011-2014 V6 (Excludes 1999-2004 Cobra & 2013-2014 GT500)


      Detroit Locker Differential. Is your stock rear end leaving you stuck in the lurch? Then you need to upgrade to a Eaton 8.8in 31 Spline Detroit Locker Differential from AmericanMuscle. A Detroit Locker Differential sometimes referred to as a "Detroit No Spin" or "Detroit Soft Locker" provides 100% of the torque to both rear wheels so you can put all the power to the pavement giving you improved traction and more impressive burnouts.

      Speed Sensitive. Eaton designed the Detroit Locker to keep both wheels in constant drive mode, but engineered in a wheel speed sensitive mechanism that has the ability to automatically allow wheel speed differentiation when required for turning and uneven road surfaces.

      Heavy Duty. This Eaton Detroit Locker Differential features a solid cast iron casing construction with a spring loaded pack and race-bred carbon fiber clutch packs. This helps the Eaton Locker deliver the highest performance even under stressful driving conditions. This Detroit Locker is virtually bullet proof and is exactly what you would expect from a name with a heritage like Eaton.

      Application. This Eaton 8.8in Detroit Locker Differential is designed to fit both solid axle suspensions equipped V8 Mustangs from 1986 to 2014 and 2011 to 2014 V6 Mustangs. Requires 31 spline axles. (Will not fit the 1999-2004 Cobra and 2013-2014 GT500).

      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 Detroit Locker 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 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 Details

      MPN# 187C145A

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (8)

      Write a Review

      Ratings Summary

      4.8 out of 5 overall rating from 8 customers

      Installation Time: Full Day

      • October 19, 2018

        5 2006 GT - RayK Installation Time: Afternoon

        Best drift mod..

        Releases at extremely slow speeds while turning. Locked the rest of the time. Exactly what I was looking for...

        Helpful (8)
      • February 28, 2018

        5 2008 Other - Jose Installation Time: Weekend

        Your best friend on stright line

        The detroit locker is good LSD for track and strip, though it is possible drive it in street with ever turn you make it pops and bangs if you make turn tight with wide turn you minimize pop and bang but it be there. This lsd not for cruise or daily car it out for maximum performance and ruggedness well worth money.

        Helpful (11)
      • January 11, 2018

        4 2014 GT - Malcolm


        I bought the car with Detroit lockers installed already from previous owner. At first I wasn't too sure about all the noise. Most reviews said it's noisy when shifting. My question is when driving shouldn't be making rattling noise? I can hear the gears rattling when driving. Maybe I don't have enough gear oil, not sure.

        Helpful (17)
      • December 27, 2017

        5 2002 GT - JoshP


        How do you lock the Axles with this Detroit Locker?

        Helpful (19)
      • September 19, 2017

        5 1988 GT - SteveS Installation Time: Afternoon


        Not finished with car but the diff went in nicely fit perfect.

        Helpful (11)
      • September 07, 2017

        4 2000 GT - MarcB


        locker is the word, noisy when turning, still beter than stock

        Helpful (10)
      • June 16, 2017

        5 1991 LX - Jonny Installation Time: Full Day

        Bullet Proof

        i drift my stang and this is hands down an amazing locker. so the good.... its super tough, super easy install, looks amazing, now to the bad... its super loud and clunky, when putting it into gear there is a huge clunk noise and there is a a half rotation of free spin before it engages. meaning when the can is up on a lift and you spin both wheels it will take half a turn until it engages and you see the driveshaft spin.. but other then that omg drifting its amazing with it. they are not joking when they say OFF ROAD USE ONLY!!!!

        Helpful (22)
      • May 03, 2016

        5 2002 GT - Chad02 Installation Time: Afternoon

        Very positive

        Very positive rear differential, when it locks you know it. Does make noise when shifting, clunks when locking in and such. Can get a little jerky in parking lots in tight corners at slow speeds. Very heavy duty. Made my car have wheel hop, but just need some upgraded lca's. I STATE AGAIN VERY POSITIVE! You want no noise and a cruiser this is not for you. You want a rear end that will hold up and not slip, this is the one for you, just have to deal with a little bit of noise. All in all does what it needs to do.

        Helpful (11)

      Questions & Answers (0 answers)

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      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Detroit Locker Differential

      Tech Specs

      Will It Fit My Mustang

      • Boss 302 - 12
      • Bullitt - 01, 08, 09
      • Cobra - 93, 94, 95, 96, 97, 98, 99, 00, 01, 03, 04
      • Cobra R - 93, 95, 00
      • GT - 87, 88, 89, 90, 91, 92, 93, 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
      • LX - 87, 88, 89, 90, 91, 92, 93
      • Mach 1 - 03, 04
      • Other - 86
      • V6 - 11, 12, 13, 14

      Fits Mustangs equipped with a 8.8" rear end. Will not fit 1999-2004 Cobra and 2013-2014 GT500.

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