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![Half Shaft Axle Assembly [Rear; Left, Drivers Side] Fits Select Mustang Ecoboost, GT, GT350](https://www.jegs.com/images/mini_750/300/397/397-m-4139-ma.jpg)
Vehicle Info NeededFORD PERFORMANCEPART NUMBER: 397-M-4139-MA
Half Shaft Axle Assembly [Rear; Left, Drivers Side] Fits Select Mustang Ecoboost, GT, GT350
$1,11869$1242.99You Save$124.30
Ships on 09/16/2026
Lowest Price GuaranteeHalf Shaft Axle AssemblySelect Mustang Ecoboost, GT, GT350 Rear Left Driver Side 34-Spline Inner, 32-Spline Outer Sold Individually
Ford Performance 397-M-4139-MA Features:
Customize your gear set and differential with Ford Racing 8.8 Mustang axle kits. You'll receive an axle housing, a housing vent, right and left 31-spline production axle shafts, a Mustang pinion flange, and a Cobra 1350 pinion flange, plus hardware. These axle kits are perfect for building your custom axle. So, do it your way with Ford Racing 8.8 Mustang axle kits.- Allows For Easy Customization
Mustang Bolt in Axle Assembly
Ford Racing's 8.8" Rear Axle Assemblies are bolt-in units that require no fabrication. Perfect for V8 conversion vehicles that are equipped with a lesser rear end. Ford Racing's 8.8" Rear Axle Kits are perfect for custom rear end builds.
Features:
- Fits 2005-2014 Mustang GT, 2012-2013 Boss 302 and 2007-2014 Mustang Shelby GT500
- Traction-Lok differential with conventional clutch packs
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- High-torque pinion bearing
- High Strength Carrier
- Includes 31 spline axle shafts
- For axle cover upgrades see Axle Girdle Cover M-4033-G2 or Aluminum Axle Cover M-4033-KA
- Calibration required if installation changes your vehicles gear ratio.
Part TypeAxle Shaft
Product LineFord Performance Rear Axle Assemblies
BrandFORD PERFORMANCE
Package Height6.0
Package Width6.5
Package Length36.5
Weight31.2 PG
Part CategoryPerformance Parts
Part FitmentDirect Fit
Vendor Part NumberM-4139-MA
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
