2011-2014 Mustang Standard V6 and GT 8.8 Rear Axle Housings and Complete-Donor Identification

The only asserted supersession is Boss/Shelby cover BR3Z-4033-A -> DR3Z-4033-B. BR3Z-4010-A and DR3Z-4010-A are parallel equipment-specific housing identities, not a supersession or interchange chain. No equivalence is asserted between housing base number 4010, cover 4033, Torsen center M-4204-MB or a seller-defined complete axle assembly.

Start with recipient and donor VINs, production and door-label AXLE code, then require readable photos of the metal axle tag, housing, cover, flange, both tubes and every bracket. Keep Base/V6 and GT donor branches separate even though the checked standard catalog exposes BR3Z-4010-A for both: match exact 2.73, 3.15, 3.31, 3.55 or 3.73 ratio as applicable, clutch-type versus Torsen differential, pinion/driveshaft flange, ABS sensors and tone equipment, axle shafts, brake adapters/backing plates, rotors/calipers, parking-brake hardware, brake lines, upper bushing/mount, lower-control-arm brackets, spring seats, shock and panhard brackets, sway-bar interfaces, cover/vent and every included fastener. A bare 4010 housing is not a geared or braked axle, and complete in a seller title is not an itemized package. Boss, Shelby/GT500, Torsen, Track/Performance and other special-equipment assemblies remain excluded because their housing, cover, differential, cooling, brake or suspension equipment is not proven interchangeable here. Before buying used, require donor mileage and crash history; housing/tube straightness or runout evidence; bracket and spring-seat geometry; cracks, torn holes, bent tubes, corrosion, heat, fire/flood exposure, prior welding or reinforcement; flange and stud condition; leaks; bearing noise, backlash and gear-pattern history; drained-fluid and metal evidence; exact contents; warranty, returns and freight-damage terms. A ratio or differential change is a deliberate driveline change and may require correct vehicle configuration/calibration. Use a qualified driveline/brake installer and rated lifting/support equipment.

No universal aftermarket whole-axle interchange is asserted. A qualified axle shop can rebuild the verified BR3Z-4010-A standard core with the recipient-correct ratio, differential, flange, ABS and brake/suspension interfaces, provided measurements, setup values, component identities, warranty and installer acceptance are documented. Custom drag housings, welded reinforcements, spool/locker conversions, nonstandard ratios and brake conversions are outside this factory-donor guide.

Limited to standard US/LHD 2011-2014 Base/V6 and GT 8.8 solid-axle cars cataloged without optional/special equipment packages. Match both VINs, door AXLE code, metal tag, BR3Z-4010-A housing identity, exact ratio, clutch-type differential, flange, ABS, brakes, mounts and written contents. A 4010 housing is bare, and complete does not guarantee shafts, brakes, sensors, cables, fluid or hardware. Boss, Shelby/GT500, Torsen and Track/Performance/special packages remain excluded. Inspect geometry, tubes, brackets, welds, corrosion, heat/crash history, leaks, backlash, fluid/metal, mileage and freight terms; use qualified installation and rated support equipment.

Supersede reviewed 15 unique research sources for this guide. 5 also appear above as a seller or official action and are not repeated here; 10 additional citations follow.

Research last verified 2026-07-29.

1. Ford — how do i find the axle ratio and limited slipOpen source
2. Ford Service Information — 14musom1eOpen source
3. Ford Service Information — 11mussg1eOpen source
4. Ford Service Information — 12mussg1eOpen source
5. Performanceparts ford — M 4204 MBOpen source
6. Fordpartsgiant — rear axleOpen source
7. Fordpartsgiant — rear axleOpen source
8. Fordpartsgiant — components rear axle differential carrierOpen source
9. Charm — Parts InformationOpen source
10. S197 lima City — indexfdc1Open source