1991 Mercury Cougar Differentials & Components

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    • (1 review)
      # 111376531
      Mercury Cougar with Independent Rear Suspension 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...
      Direct-fit OE-quality replacement for your factory partHelps restore the proper functionality of your vehicle
      $186.37 - $261.39
    • (0 reviews)
      # 531071538
      Mercury Cougar 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...
      Replacement eliminates driveline grinding and whining soundsDirect replacement for a proper fit
      $113.52 - $191.95
    • (1 review)
      # 531120599
      Mercury Cougar 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
      $61.59 - $84.86
    • (0 reviews)
      # 531047661
      Mercury Cougar 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)
      # 531203259
      Mercury Cougar 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...
      Designed to effectively reduce frictionUltimate load handling capability
      $6.86 - $10.17
    • (0 reviews)
      # mpn2035566
      Mercury Cougar 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...
      Designed to effectively reduce frictionUltimate load handling capability
      $11.53
    • (0 reviews)
      # mpn2054355
      Mercury Cougar with 7.5" Ring Gear / with 8.8" Ring Gear 1991, Rear Differential Pinion Seal by Timken®. Timken offers the right seal to keep your vehicle running optimally. Timken seals provide ultimate protection from contaminants and...
      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
      $10.10
    • (0 reviews)
      # 531187033
      Mercury Cougar 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
      $4.08 - $5.38
    • (0 reviews)
      # mpn2371034
      Mercury Cougar 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
      $2.93
    • (0 reviews)
      # mpn2377088
      Mercury Cougar 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...
      Replacement restores drivabilityDirect replacement for a proper fit
      $1.68
    • (0 reviews)
      # 531085850
      Mercury Cougar with Independent Rear Suspension 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...
      Premium bearing design matches OEM specificationsPrecision manufactured using premium-grade steel for outstanding durability and performance
      $7.78 - $11.44
    • (0 reviews)
      # mpn1074425
      Mercury Cougar with 7.5" Ring Gear with Independent Rear Suspension 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...
      Premium bearing design matches OEM specificationsPrecision manufactured using premium-grade steel for outstanding durability and performance
      $4.16
    • (0 reviews)
      # mpn1848337397
      Mercury Cougar with 8.8" Ring Gear with Independent Rear Suspension with Ford Series Axle 1991, Rear Axle Standard Differential Bearing and Seal Kit by National®. This bearing is manufactured from high quality steel and constructed...
      Spindle bearing and seal kitIncludes all components required to complete the repair
      $72.90
    • (0 reviews)
      # 531080162
      Mercury Cougar with 7.5" Ring Gear / with 8.8" Ring Gear with Independent Rear Suspension with Ford Series Axle 1991, Rear Differential Pinion Bearing by National®. This bearing is manufactured from high quality steel and constructed...
      Premium bearing design matches OEM specificationsPrecision manufactured using premium-grade steel for outstanding durability and performance
      $8.07 - $10.74
    • (0 reviews)
      # 531146639
      Mercury Cougar with 7.5" Ring Gear / with 8.8" Ring Gear with Independent Rear Suspension with Ford Series Axle 1991, Rear Differential Pinion Race by National®. This part is manufactured by one of the most trusted names in the...
      Premium bearing design matches OEM specificationsPrecision manufactured using premium-grade steel for outstanding durability and performance
      $4.34 - $5.81
    • (0 reviews)
      # mpn1179151
      Mercury Cougar with 7.5" Ring Gear / with 8.8" Ring Gear with Independent Rear Suspension with Ford Transmission 1991, Rear Outer Differential Pinion Repair Sleeve by National®. This part is manufactured by one of the most trusted names...
      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
      Mercury Cougar with 7.5" Ring Gear / with 8.8" Ring Gear with Independent Rear Suspension with Ford Series Axle 1991, Rear Outer Differential Pinion Seal by National®. This product is made of high-quality materials to serve you for...
      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)
      # 503639321
      Mercury Cougar with Ford 7.5" Series Axle 1991, 12 Point Ring Gear Bolt Kit by ARP®. The tremendous shock loads generated at launch by most any drag racing vehicle equipped with today’s sticky tire compounds or the acceleration and...
      Designed to unlock more performance out of your vehicleDeliver a reasonable balance of strength and durability
      $40.89 - $65.36
    • (0 reviews)
      # mpn4515297019
      Mercury Cougar with Ford 8.8" Series Axle / with Ford 9" Series Axle 1991, Differential Cross Pin by AllStar Performance®. Designed utilizing the latest technology, this product by AllStar Performance features premium quality and will...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $14.99
    • (0 reviews)
      # mpn4515291619
      Mercury Cougar with Ford 8.8" Series Axle / with Ford 9" Series Axle 1991, Differential Pinion Nut by AllStar Performance®. Designed utilizing the latest technology, this product by AllStar Performance features premium quality and will...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $4.99
    • (0 reviews)
      # mpn4515297149
      Mercury Cougar with Ford 9" Series Axle 1991, Differential Pinion Seal by AllStar Performance®. Designed utilizing the latest technology, this product by AllStar Performance features premium quality and will perform better than...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $7.99
    • (0 reviews)
      # mpn4515290613
      Mercury Cougar with Ford 8.8" Series Axle with 10 Bolt 1991, Mini Spool by AllStar Performance®. Designed utilizing the latest technology, this product by AllStar Performance features premium quality and will perform better than...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $96.99
    • (0 reviews)
      # 1041005185
      Mercury Cougar 1991, Ring and Pinion Installation Bearing Kit by AllStar Performance®. Designed utilizing the latest technology, this product by AllStar Performance features premium quality and will perform better than advertised....
      Precise manufacturing and high-grade materialsExceptional performance at a competitive price
      $98.99 - $128.99
    • (0 reviews)
      # mpn4515295194
      Mercury Cougar with Ford 8.8" Series Axle with 10 Bolt 1991, Ring and Pinion Installation Shim Kit by AllStar Performance®.
      Precise manufacturing and high-grade materialsExceptional performance at a competitive price
      $44.99
    • (0 reviews)
      # mpn4515297068
      Mercury Cougar with Ford 9" Series Axle 1991, Ring and Pinion Installation Shim Kit with Crush Sleeve by AllStar Performance®.
      Precise manufacturing and high-grade materialsExceptional performance at a competitive price
      $27.99
    • (0 reviews)
      # mpn4515297067
      Mercury Cougar with Ford 9" Series Axle 1991, Ring and Pinion Installation Shim Kit with Solid Spacer by AllStar Performance®.
      Precise manufacturing and high-grade materialsExceptional performance at a competitive price
      $37.99
    • (0 reviews)
      # 1016946479
      Mercury Cougar with Ford 9" Series Axle 1991, Spool by AllStar Performance®.
      $137.99 - $204.99
    • (0 reviews)
      # 1017015827
      Mercury Cougar with Ford 9" Series Axle 1991, with Installed Races Differential Pinion Suppport by AllStar Performance®. Designed utilizing the latest technology, this product by AllStar Performance features premium quality and will...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $119.99 - $148.99
    • (0 reviews)
      # 1029070615
      Mercury Cougar LS / XR-7 with Ford 8.8" Series Axle with 10 Bolt 1991, ECTED Max™ Rear Limited Slip Differential by Auburn Gear®. With Selectable Full Locker. The ECTED Max is a selectable traction device; an on/off switch is mounted...
      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
      $761.88
    • (0 reviews)
      # 1028890964
      Mercury Cougar LS / XR-7 with Ford 8.8" Series Axle with 10 Bolt 1991, HP™ Rear Limited Slip Differential by Auburn Gear®. High Performance. Auburn Gear’s flagship limited-slip differential gives you smooth torque-sensing operation...
      Expertly crafted from superior materialsProvides exceptional reliability
      $428.40
    • (0 reviews)
      # 1029341646
      Mercury Cougar LS / XR-7 with Ford 8.8" Series Axle with 10 Bolt 1991, Pro™ Rear Limited Slip Differential by Auburn Gear®. Turns your torque up another notch, offering an even higher bias ratio and faster sensing reaction than HP for...
      Expertly crafted from superior materialsProvides exceptional reliability
      $493.27 - $512.86
    • (0 reviews)
      # mpn4517168496
      Mercury Cougar with Ford 7.5" Series Axle 1991, Rear Differential Cross Pin by Auburn Gear®. Dominate the track or hit the trails with condidence by fine tuning your vehicle for neck-breaking speed and performance with this premium...
      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
      $49.01
    • (0 reviews)
      # 503368505
      Mercury Cougar LS / XR-7 with Ford 8.8" Series Axle with 10 Bolt 1991, Rear Differential Spring Retainer Service Kit by Auburn Gear®. Dominate the track or hit the trails with confidence by fine tuning your vehicle for neck-breaking...
      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
      $111.63
    • (0 reviews)
      # mpn4517170296
      Mercury Cougar with Ford 7.5" Series Axle 1991, Rear Spider Gear Kit by Auburn Gear®. Dominate the track or hit the trails with condidence by fine tuning your vehicle for neck-breaking speed and performance with this premium...
      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
      $80.78
    • (0 reviews)
      # mpn4517168158
      Mercury Cougar LS / XR-7 with 28 Spline with Ford 8.8" Series Axle with 10 Bolt 1991, Road Race™ Rear Limited Slip Differential by Auburn Gear®. Auburn Gear, LLC. Has developed a performance limited-slip differential specifically for...
      Expertly crafted from superior materialsProvides exceptional reliability
      $498.17
    • (0 reviews)
      # mpn4517168048
      Mercury Cougar with 27 Spline with Toyota 7.5" Series Axle with 1.30" Axle Shaft Diameter 1991, Detroit Truetrac™ Rear Differential by Eaton®. The Detroit Truetrac is a helical-gear style performance differential that maximizes wheel...
      Helical-style pinion gearsLimited-slip operation
      $532.37
    • (0 reviews)
      # mpn4517171223
      Mercury Cougar with Ford 7.5" Series Axle 1991, Rear Pinion Solid Spacer by G2 Axle & Gear®. Designed utilizing the latest technology, this product by G2 Axle & Gear features premium quality and will perform better than advertised....
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $21.99
    • (0 reviews)
      # 1029004619
      Mercury Cougar 1991, Differential Carrier Gear Kit by Motive Gear®. Dominate the track or hit the trails with confidence by fine tuning your vehicle for neck-breaking speed and performance with this premium differential component that...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $120.22 - $249.55
    • (0 reviews)
      # 1029225495
      Mercury Cougar 1991, Differential Carrier Shim Kit by Motive Gear®. All Motive Gear products are engineered for their specific application and manufactured in state of the art facilities. All of company products undergo rigid quality...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $17.31 - $21.36
    • (0 reviews)
      # mpn4517166249
      Mercury Cougar with 7.5" Series Axle with 10 Bolt 1991, Differential Crush Sleeve by Motive Gear®. All Motive Gear products are engineered for their specific application and manufactured in state of the art facilities. All of company...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $2.45
    • (0 reviews)
      # 503570999
      Mercury Cougar 1991, Differential Gear Installation Kit by Motive Gear®. All Motive Gear products are engineered for their specific application and manufactured in state of the art facilities. All of company products undergo rigid...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $31.82
    • (0 reviews)
      # 503650000
      Mercury Cougar with 10 Bolt 1991, Differential Master Bearing Kit by Motive Gear®. All Motive Gear products are engineered for their specific application and manufactured in state of the art facilities. All of company products undergo...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $80.43 - $91.89
    • (0 reviews)
      # mpn4517168192
      Mercury Cougar with 8.8" Series Axle with 10 Bolt 1991, Differential Pinion Nut by Motive Gear®. Dominate the track or hit the trails with confidence by fine tuning your vehicle for neck-breaking speed and performance with this premium...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $4.00
    • (0 reviews)
      # mpn4517170049
      Mercury Cougar with 7.5" Series Axle / with 8.8" Series Axle / with 9" Series Axle / with 9.75" Series Axle 1991, Differential Pinion Seal by Motive Gear®. Dominate the track or hit the trails with confidence by fine tuning your vehicle...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $3.94
    • (0 reviews)
      # 126499954
      Mercury Cougar 1991, Differential Pinion Shaft by Motive Gear®. Dominate the track or hit the trails with confidence by fine tuning your vehicle for neck-breaking speed and performance with this premium differential component that...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $19.20 - $20.27
    • (0 reviews)
      # mpn4517166248
      Mercury Cougar with Chrysler 8" Series Axle / with Chrysler 8.25" Series Axle / with Chrysler 8.375" Series Axle / with Dana 44 Series Axle / with Ford 7.5" Series Axle / with Ford 8.8" Series Axle / with GM 8" Series Axle / with GM 8.5"...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $8.10
    • (0 reviews)
      # 126509672
      Mercury Cougar 1991, Differential Ring Gear Bolt by Motive Gear®. Dominate the track or hit the trails with confidence by fine tuning your vehicle for neck-breaking speed and performance with this premium differential component that...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $2.31 - $11.95
    • (0 reviews)
      # 503613364
      Mercury Cougar with 10 Bolt 1991, Rear Differential Bearing Kit by Motive Gear®. All Motive Gear products are engineered for their specific application and manufactured in state of the art facilities. All of company products undergo...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $71.31 - $78.74
    • (0 reviews)
      # 503525981
      Mercury Cougar with 10 Bolt 1991, Rear Differential Carrier by Motive Gear®. All Motive Gear products are engineered for their specific application and manufactured in state of the art facilities. All of company products undergo rigid...
      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)
      # mpn4517169708
      Mercury Cougar with Ford 8.8" Series Axle with 10 Bolt 1991, Rear Differential Clutch Pack by Motive Gear®. All Motive Gear products are engineered for their specific application and manufactured in state of the art facilities. All of...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $75.35
    • (0 reviews)
      # 503320089
      Mercury Cougar with 10 Bolt 1991, Rear Differential Super Bearing Kit by Motive Gear®. Dominate the track or hit the trails with confidence by fine tuning your vehicle for neck-breaking speed and performance with this premium...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $106.76 - $119.58
    • (0 reviews)
      # 126509683
      Mercury Cougar with Open Differential with 8.8" Series Axle with 10 Bolt 1991, Rear Mini Spool by Motive Gear®. Dominate the track or hit the trails with confidence by fine tuning your vehicle for neck-breaking speed and performance...
      Motive Gear uses the highest quality standards of manufacturingFrom machining and finishing to heat treatment company demand the best
      $81.49
    • (0 reviews)
      # 503489984
      Mercury Cougar with 10 Bolt 1991, Rear Performance Ring and Pinion Gear Set by Motive Gear®. Motive Gear Performance ring and pinions are perfect for dedicated racing or off-road vehicle. Gear sets are made from first-run steel, we...
      Central contact patternCNC start to finish
      $203.94 - $275.47
    • (0 reviews)
      # 503292188
      Mercury Cougar with 10 Bolt 1991, Rear Ring and Pinion Gear Set by Motive Gear®. Motive Gear stock performance ring and pinions are excellent replacements for OE. Experienced installers prefer ring and pinions for easy setup, superior...
      Quiet operationComputer controlled heat treatment
      $212.10 - $232.42
    • (0 reviews)
      # 1145636345
      Mercury Cougar with 31 Shaft Spline with 2.73 and Up Gear Ratio with Ford 8.8" Series Axle 1991, Differential Locker by OX Off Road®. OX Lockers can instantly lock differentials and allow you to tackle the toughest off-road terrain. The...
      Easy clean cabin friendly installation with no setup adjustmentsStandard system uses no electric for a higher level of dependability
      $859.00 - $994.00
    • (0 reviews)
      # mpn4517169367
      Mercury Cougar with Ford 8.8" Series Axle 1991, Differential Pinion Shaft by Powertrax®. These hardened cross shafts are specifically designed for use with your Powertrax Lock Right locker. Powertrax Grip-Lok, Lock-Right Lockers and...
      High quality at an affordable priceExpertly made from premium materials
      $25.58
    • (0 reviews)
      # 503660015
      Mercury Cougar with Open Differential 1991, Lock Right Locker by Powertrax®. Powertrax Lock-Right performance lockers’ straight-line performance is equal to a solid spool axle, yet they automatically unlock during turns. When extreme...
      Brute force devices for rugged applicationsReplacement of differential case not required
      $339.07 - $405.19
    • (0 reviews)
      # 503586350
      Mercury Cougar with Ford 8.8" Series Axle 1991, No-Slip Traction System by Powertrax®. For vehicles that are driven daily, the Powertrax No-Slip Traction System is the latest design in quiet traction-adding differential technology. It...
      Extreme Traction PerformanceEnables a 2 Wheel Drive to outperform a 4 Wheel Drive in poor traction conditions
      $427.08 - $468.14
    • (0 reviews)
      # 503554068
      Mercury Cougar 1991, Differential Bearing Kit by Richmond®. Dominate the track or hit the trails with confidence by fine tuning your vehicle for neck-breaking speed and performance with this premium differential component that delivers...
      Outstanding design and state of the art manufacturing techniquesExtensive testing ensures uncompromising reliability
      $131.97 - $141.78
    • (0 reviews)
      # 503543011
      Mercury Cougar 1991, Differential Gear Installation Kit by Richmond®. Dominate the track or hit the trails with confidence by fine tuning your vehicle for neck-breaking speed and performance with this premium differential gear...
      Outstanding design and state of the art manufacturing techniquesExtensive testing ensures uncompromising reliability
      $30.28 - $32.62




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