1991 Ford Mustang Differentials & Components

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    • (1 review)
      # 111380093
      Ford Mustang with Ford Series Axle 1991, Rear Ring and Pinion Gear Set by USA Standard Gear®. USA Standard ring and pinion sets are the right choice to add confidence to your install. USA Standard Gear offers a full line of ring &...
      Direct-fit OE-quality replacement for your factory partHelps restore the proper functionality of your vehicle
      $186.37 - $261.39
    • (0 reviews)
      # 531052640
      Ford Mustang 1991, Rear Differential Ring and Pinion by Dorman®. The gears of Dorman’s Differential Ring and Pinion are engineered to effectively transfer torque from the driveshaft to the axles. It's robust steel construction ensures...
      Replacement eliminates driveline grinding and whining soundsDirect replacement for a proper fit
      $117.67 - $191.95
    • (0 reviews)
      # 294376106
      Ford Mustang with Ford Series Axle 1991, Differential Case by American Axle®. AAM differential cases are machined and assembled to the high quality standards and tolerances that OEM's require. All case and case assemblies are designed...
      Dependable solution for driveline and drivetrain systemsHighly engineered for top quality and operational excellence
      $157.82 - $339.13
    • (1 review)
      # 68573555
      Ford Mustang with Ford Series Axle 1991, Rear Master Overhaul Bearing Kit by USA Standard Gear®. USA Standard Master Overhaul kits let you finish your install with confidence. This kit uses Koyo bearings and races. When it comes to a...
      Uses Koyo bearings and racesExpertly crafted from premium materials
      $132.91 - $133.70
    • (1 review)
      # 531080460
      Ford Mustang 1991, Rear Axle Differential Bearing and Seal Kit by Timken®. Get optimum vehicle performance with Timken bearings. Timken manufactures ball bearings, cylindrical roller bearings, and tapered roller bearings, and all...
      Designed to effectively reduce frictionUltimate load handling capability
      $63.80 - $84.13
    • (0 reviews)
      # 531056286
      Ford Mustang 1991, Rear Differential Bearing Kit by Dorman®. Dorman’s Differential Bearing Kit allows you to keep all the necessary components for installation of the Differential Ring and Pinion readily on hand. The kit includes...
      Replacement eliminates driveline grinding and whining soundsRobust steel construction ensures durability for years of service
      $106.95 - $109.95
    • (0 reviews)
      # mpn739976600
      Ford Mustang with 8.8" Ring Gear with Ford Series Axle with 28 Spline 1991, Rear Differential Bearing Kit by USA Standard Gear®. This kit uses Koyo bearings and races along with all high quality small parts. USA Standard Gear does...
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $101.99
    • (0 reviews)
      # mpn739977058
      Ford Mustang with 8.8" Ring Gear with Ford Series Axle with 28 Spline 1991, Rear Pinion Installation Kit by USA Standard Gear®. USA Standard ring and pinion sets are the right choice to add confidence to your install. USA Standard Gear...
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $68.52
    • (0 reviews)
      # 68573660
      Ford Mustang with Ford Series Axle with 28 Spline 1991, Spider Gear Set by USA Standard Gear®. USA Standard gear sets are the right choice to add confidence to your install. USA Standard Gear offers a full line of gear sets for a...
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $102.61 - $132.42
    • (0 reviews)
      # 212831915
      Ford Mustang with General Motors Series Axle 1991, Basic Series Differential Kit by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding performance and easy use which makes it the perfect deal...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $15.44 - $16.82
    • (0 reviews)
      # 212831925
      Ford Mustang with General Motors Series Axle 1991, Complete Series™ Differential Kit by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding performance and easy use which makes it the perfect...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $75.39 - $82.35
    • (0 reviews)
      # 212831947
      Ford Mustang with General Motors Series Axle 1991, Differential Installation Kit by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding performance and easy use which makes it the perfect deal...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $34.26 - $39.80
    • (0 reviews)
      # 531057350
      Ford Mustang 1991, Rear Differential Bearing by Timken®. Get optimum vehicle performance with Timken bearings. Timken manufactures ball bearings, cylindrical roller bearings, and tapered roller bearings, and all feature premium design,...
      Designed to effectively reduce frictionUltimate load handling capability
      $7.11 - $10.54
    • (0 reviews)
      # mpn2035566
      Ford Mustang with 8.8" Ring Gear 1991, Rear Differential Bearing Set by Timken®. Get optimum vehicle performance with Timken bearings. Timken manufactures ball bearings, cylindrical roller bearings, and tapered roller bearings, and all...
      Designed to effectively reduce frictionUltimate load handling capability
      $11.93
    • (0 reviews)
      # 531053752
      Ford Mustang 1991, Rear Differential Race by Timken®. Precision manufactured using premium materials and made by the company that is trusted by many carmakers, the Timken race is the right choice if you opt for a highly durable part...
      OE quality fit, performance, and reliabilityCost-effective friction management solution
      $4.21 - $5.55
    • (0 reviews)
      # mpn2054355
      Ford Mustang with 7.5" Ring Gear / with 8.8" Ring Gear 1991, Rear Outer Differential Pinion Seal by Timken®. Timken offers the right seal to keep your vehicle running optimally. Timken seals provide ultimate protection from contaminants...
      Machined rubber sealing edge provides greater accuracy and consistency and a better sealing surfaceAn extra dust lip helps keep harmful contaminants out and protects against rust and corrosion
      $10.47
    • (0 reviews)
      # mpn2006952
      Ford Mustang with 7.5" Ring Gear / with 8.8" Ring Gear 1991, Rear Outer Optional Differential Pinion Repair Sleeve by Timken®. Repair sleeves restore the sealing surface on yokes and shafts, avoiding expensive components replacement....
      Restores the sealing surface on worn shafts and yokesEliminates the need to replace expensive components that are otherwise serviceable
      $19.52
    • (0 reviews)
      # mpn2371034
      Ford Mustang 1991, Differential Crush Sleeves by Dorman®. A necessary item to replace when servicing the differential, Dorman’s Differential Crush Sleeve is durably built to retain optimal pressure when the pinion gear nut is...
      Direct replacement for a proper fit every timeDesigned specifically for rear-wheel drive vehicles
      $3.04
    • (0 reviews)
      # mpn2377088
      Ford Mustang with 7.5" Ring Gear / with 8.8" Ring Gear 1991, Rear Differential Pinion Shaft Lock Bolt by Dorman®. Engineered from high-quality metal, Dorman’s Differential Pinion Shaft Lock Bolt effectively retains the pinion shaft to...
      Replacement restores drivabilityDirect replacement for a proper fit
      $1.74
    • (0 reviews)
      # mpn2889949607
      Ford Mustang 1991, Advantage™ Rear Differential Bearing by ACDelco®. Don’t be “indifferent” toward your differential. It plays a vital role in moving your vehicle and ensuring a smooth ride. Designed utilizing the latest...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $8.15
    • (0 reviews)
      # mpn3065960247
      Ford Mustang with 6.75" Ring Gear / with 7.5" Ring Gear 1991, Advantage™ Rear Differential Carrier Bearing Race With 1.7812" ID by ACDelco®. Don’t be “indifferent” toward your differential. It plays a vital role in moving your...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $7.29
    • (0 reviews)
      # 531085499
      Ford Mustang with Ford Series Axle 1991, Rear Axle Differential Bearing by National®. This bearing is manufactured from high quality steel and constructed utilizing state-of-the-art computer controlled heat treatment technology to...
      Premium bearing design matches OEM specificationsPrecision manufactured using premium-grade steel for outstanding durability and performance
      $7.78 - $11.44
    • (0 reviews)
      # mpn1074425
      Ford Mustang with 7.5" Ring Gear with Ford Transmission 1991, Rear Axle Differential Bearing Race by National®. This part is manufactured by one of the most trusted names in the automotive industry to keep your vehicle perform...
      Premium bearing design matches OEM specificationsPrecision manufactured using premium-grade steel for outstanding durability and performance
      $4.16
    • (0 reviews)
      # 531079261
      Ford Mustang with 8.8" Ring Gear with Ford Series Axle 1991, Rear Axle Differential Bearing and Seal Kit by National®. This bearing is manufactured from high quality steel and constructed utilizing state-of-the-art computer controlled...
      Spindle bearing and seal kitIncludes all components required to complete the repair
      $72.90 - $82.61
    • (0 reviews)
      # 531105955
      Ford Mustang with 7.5" Ring Gear / with 8.8" Ring Gear with Ford Series Axle 1991, Rear Differential Pinion Bearing by National®. This bearing is manufactured from high quality steel and constructed utilizing state-of-the-art computer...
      Premium bearing design matches OEM specificationsPrecision manufactured using premium-grade steel for outstanding durability and performance
      $8.07 - $10.74
    • (0 reviews)
      # 531050111
      Ford Mustang with 7.5" Ring Gear / with 8.8" Ring Gear with Ford Series Axle 1991, Rear Differential Pinion Race by National®. This part is manufactured by one of the most trusted names in the automotive industry to keep your vehicle...
      Premium bearing design matches OEM specificationsPrecision manufactured using premium-grade steel for outstanding durability and performance
      $4.34 - $5.68
    • (0 reviews)
      # mpn1179151
      Ford Mustang with 7.5" Ring Gear / with 8.8" Ring Gear with Ford Transmission 1991, Rear Outer Differential Pinion Repair Sleeve by National®. This part is manufactured by one of the most trusted names in the automotive industry to keep...
      National Redi-Sleeves are precision stainless steel wear sleeves designed to quickly repair damaged, grooved or worn shaftsStrong, durable stainless steel construction provides a corrosion-free sealing surface that surpasses most original shaft specifications
      $19.44
    • (0 reviews)
      # mpn1307887
      Ford Mustang with 7.5" Ring Gear / with 8.8" Ring Gear with Ford Series Axle 1991, Rear Outer Differential Pinion Seal by National®. This product is made of high-quality materials to serve you for years to come. Designed using...
      National oil seals are recognized worldwide for their quality and reliable performance for every type of repair.Design Type: Spring Loaded; Multi-Lip
      $9.47
    • (0 reviews)
      # mpn1579934491
      Ford Mustang with 8.8" Ring Gear with Ford Series Axle 1991, Pinion Shaft Lock Bolt by American Axle®. Designed with precision and functionality in mind, this accessory ensures outstanding performance and easy use which makes it the...
      Dependable solution for driveline and drivetrain systemsHighly engineered for top quality and operational excellence
      $4.81
    • (0 reviews)
      # 212831931
      Ford Mustang with General Motors Series Axle 1991, Crush Sleeve by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding performance and easy use which makes it the perfect deal for your ultimate...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $2.92
    • (0 reviews)
      # mpn358588579
      Ford Mustang LX with 7.5" Ring Gear with General Motors Series Axle with 27 Spline 1991, Differential Bearing Kit With Pinion 10-Bolt by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $54.97
    • (0 reviews)
      # mpn358588627
      Ford Mustang LX with 7.5" Ring Gear with General Motors Series Axle 1991, Differential Bearing Spacer With Shim Pack by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding performance and easy...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $12.60
    • (0 reviews)
      # 212831936
      Ford Mustang with General Motors Series Axle 1991, Differential Carrier Bearing Set by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding performance and easy use which makes it the perfect...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $23.31 - $26.50
    • (0 reviews)
      # 212831933
      Ford Mustang GT / LX with 8.8" Ring Gear with General Motors Series Axle 1991, Differential Pinion Bearing by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding performance and easy use which...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $11.88 - $47.49
    • (0 reviews)
      # 212831951
      Ford Mustang with General Motors Series Axle 1991, Differential Pinion Nut by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding performance and easy use which makes it the perfect deal for...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $3.44
    • (0 reviews)
      # 212831961
      Ford Mustang with General Motors Series Axle 1991, Differential Pinion Seal by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding performance and easy use which makes it the perfect deal for...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $6.92
    • (0 reviews)
      # 212831953
      Ford Mustang with General Motors Series Axle 1991, Differrential Carrier Shim Set by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding performance and easy use which makes it the perfect deal...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $13.73 - $23.80
    • (0 reviews)
      # mpn358588439
      Ford Mustang LX with 7.5" Ring Gear with General Motors Series Axle 1991, Pinion Shim Set by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding performance and easy use which makes it the...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $9.52
    • (0 reviews)
      # 212831959
      Ford Mustang with General Motors Series Axle 1991, Ring Gear Bolt Set by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding performance and easy use which makes it the perfect deal for your...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $7.55
    • (0 reviews)
      # 212831964
      Ford Mustang with General Motors Series Axle 1991, Smart Sleeve Crush Sleeve by Ratech®. Designed with precision and functionality in mind, this accessory ensures outstanding performance and easy use which makes it the perfect deal for...
      OEM design and manufacturing ensure top qualityCrafted from prime materials for long-term service
      $9.61
    • (0 reviews)
      # 742452474
      Ford Mustang with 10 Bolt 1991, Rear Differential Carrier by Motive Gear®. Location: Rear. All Motive Gear products are engineered for their specific application and manufactured in state of the art facilities. All of company products...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $87.53 - $289.17
    • (0 reviews)
      # 503356419
      Ford Mustang with 10 Bolt 1991, Rear Performance Ring and Pinion Gear Set by Motive Gear®. Location: Rear. Motive Gear Performance ring and pinions are perfect for dedicated racing or off-road vehicle. Gear sets are made from first-run...
      Central contact patternCNC start to finish
      $203.94 - $275.47
    • (0 reviews)
      # 503697815
      Ford Mustang with 10 Bolt 1991, Rear Ring and Pinion Gear Set by Motive Gear®. Location: Rear. Motive Gear stock performance ring and pinions are excellent replacements for OE. Experienced installers prefer ring and pinions for easy...
      Quiet operationComputer controlled heat treatment
      $212.10 - $232.42
    • (0 reviews)
      # 97194598
      Ford Mustang with Ford 8.8" Series Axle 1991, Ring and Pinion Gear Set by Alloy USA®. Mounting larger diameter wheels and tires requires a gear ratio change to maintain the same performance. But even if you're not getting new skins,...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $308.33 - $399.00
    • (0 reviews)
      # mpn4517169806
      Ford Mustang with 4.56 Gear Ratio / with 4.88 Gear Ratio / with 5.13 Gear Ratio with GM 8.8" Series Axle with 10 Bolt with 1.20" Axle Shaft Diameter 1991, Detroit Locker™ Rear Differential by Eaton®. Location: Rear. The Detroit Locker...
      100% automatic locking - no driver action neededProvides maximum amount of traction to both wheel ends
      $823.62
    • (0 reviews)
      # 1029170519
      Ford Mustang 1991, Detroit Truetrac™ Rear Differential by Eaton®. Location: Rear. The Detroit Truetrac is a helical-gear style performance differential that maximizes wheel traction and enhances driving and handling characteristics....
      Helical-style pinion gearsLimited-slip operation
      $554.99 - $636.60
    • (0 reviews)
      # mpn4517170778
      Ford Mustang with GM 8.8" Series Axle with 10 Bolt with 1.32" Axle Shaft Diameter 1991, ELocker™ Rear Differential by Eaton®. Location: Rear. The Eaton ELocker is an electronic, selectable differential designed for drivers that need...
      Selectable 'push-button' operationPositive-electronic locking mechanism
      $941.79
    • (0 reviews)
      # 1029250603
      Ford Mustang with GM 8.8" Series Axle with 10 Bolt 1991, Posi™ Rear Differential by Eaton®. Location: Rear. The Eaton Posi limited-slip differential prevents wheel slip before it can get started. To do that, carbon disc clutch packs,...
      Superior rebuildable designRace-bred carbon friction discs
      $513.42 - $547.67
    • (0 reviews)
      # 1029270618
      Ford Mustang with 28 Spline with Ford 8.8" Series Axle 1991, Rear Dura Grip Carrier Case by Yukon Gear & Axle®. Without Spider Gears. Location: Rear. Dominate the track or hit the trails with confidence by fine tuning your vehicle for...
      Enables you to keep your engine in the powerband for more giddy-up and high speedAllows for getting superior traction on just about any brutal terrain
      $254.96
    • (0 reviews)
      # 503522349
      Ford Mustang 1991, Rear Dura Grip Positraction by Yukon Gear & Axle®. Location: Rear. The Yukon Dura Grip an example of the popular clutch plate limited slips that appeared as OE equipment. Steel clutch plates, half of which are covered...
      Provides aggressive yet smooth traction to give you the confidence and performance you needFully rebuildable 4 spring design with composite clutches
      $486.52 - $524.49
    • (0 reviews)
      # 1029097593
      Ford Mustang with 28 Spline with Ford 8.8" Series Axle 1991, Rear Grizzly Locker by Yukon Gear & Axle®. Location: Rear. The Yukon Grizzly Locker is the ultimate in mechanical locking differentials for street, off-road, and drag racing....
      Available for many popular off-road & performance applicationsPatent pending design reduces common failures
      $715.77 - $722.85
    • (0 reviews)
      # 503687300
      Ford Mustang 1991, Rear High Performance Ring and Pinion Gear Set by Yukon Gear & Axle®. Location: Rear. Yukon Ring and Pinion sets give you the confidence of knowing you’re running gears designed for the harshest of conditions....
      Smooth finishEasy Set-Up
      $232.54 - $414.33
    • (0 reviews)
      # 503427530
      Ford Mustang 1991, Rear Standard Open Carrier Case by Yukon Gear & Axle®. Without Spider Gears. Location: Rear. Dominate the track or hit the trails with confidence by fine tuning your vehicle for neck-breaking speed and performance...
      Enables you to keep your engine in the powerband for more giddy-up and high speedAllows for getting superior traction on just about any brutal terrain
      $253.82 - $327.02
    • (0 reviews)
      # mpn4517169545
      Ford Mustang with Ford 8.8" Series Axle 1991, Performance Series™ Rear Ring and Pinion Gear Set by G2 Axle & Gear®. Location: Rear. G2’s line of Performance Series ring and pinions are engineered and manufactured to handle the...
      Forged 8620 SteelPrecision-machined for exact fit
      $224.99
    • (0 reviews)
      # mpn4517170837
      Ford Mustang with 31 Spline with Ford 8.8" Series Axle with 10 Bolt 1991, Rear Differential Carrier Case by G2 Axle & Gear®. Location: Rear. Dominate the track or hit the trails with confidence by fine tuning your vehicle for...
      Enables you to keep your engine in the powerband for more giddy-up and high speedAllows for getting superior traction on just about any brutal terrain
      $139.99
    • (0 reviews)
      # mpn4517168182
      Ford Mustang with 31 Spline with Ford 8.8" Series Axle with 10 Bolt 1991, Rear Posi Limited Slip Differential by G2 Axle & Gear®. Location: Rear. G2 limited slip differentials deliver increased traction over conventional open...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $349.99
    • (0 reviews)
      # 1029050490
      Ford Mustang GT / LX with Ford 8.8" Series Axle with 10 Bolt 1991, ECTED Max™ Rear Limited Slip Differential by Auburn Gear®. With Selectable Full Locker. Location: Rear. The ECTED Max is a selectable traction device; an on/off switch...
      Gearing is made from aircraft quality, 9310 heat treated billet steel to make it tough, durable and reliableSwitch the locker on or off "on-the-fly," at moderate road speeds with all 4 wheels on the ground
      $740.21
    • (0 reviews)
      # 1029258634
      Ford Mustang with 10 Bolt 1991, HP™ Rear Limited Slip Differential by Auburn Gear®. Location: Rear. High Performance. Auburn Gear’s flagship limited-slip differential gives you smooth torque-sensing operation with the correct bias...
      Expertly crafted from superior materialsProvides exceptional reliability
      $416.16 - $434.52
    • (0 reviews)
      # 1029362519
      Ford Mustang 1991, MAX Lock™ Rear Open Mechanical Locker Differential by Auburn Gear®. Location: Rear. New is an automatic full locker, giving both 4 Wheel Drives and 2 Wheel Drives optimized traction all the time–even in the most...
      Enables you to keep your engine in the powerband for more giddy-up and high speedAllows for getting superior traction on just about any brutal terrain
      $309.83 - $349.35
    • (1 review)
      # 1029029601
      Ford Mustang with 10 Bolt 1991, Pro™ Rear Limited Slip Differential by Auburn Gear®. Location: Rear. Turns your torque up another notch, offering an even higher bias ratio and faster sensing reaction than HP for the very best in...
      Expertly crafted from superior materialsProvides exceptional reliability
      $474.91 - $506.74




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