1991 Mercury Cougar Differentials

Essential 1991 Mercury Cougar Differentials

Yukon Gear – 8" Ford Pinion Seal (Part No.30180)

8" Ford Pinion Seal

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$24.99
8″ Ford pinion seal.Yukon Mighty seal.

Product Features:
  • Pinion seal
  • Fits Ford 8″
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Yukon Gear – Grizzly Locker, Ford 9" With 35 Splines, For Use With Load Bolt Dropout (Part No.28012)

Grizzly Locker, Ford 9" With 35 Splines, For Use With Load Bolt Dropout

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$993.99
The Yukon Grizzly Locker is the ultimate in locking differentials for street, off-road, & drag racing. Grizzly Lockers provide 100% power to both tires, while still allowing for disengagement while negotiating turns. The Yukon Grizzly locker is a mechanical locking differential. It features a forged case and 8620 internals for maximum strength. It’s patented design reduces common locker failures. All units assembled in the USA! This unit has been machined for use in dropouts with a load-bolt. All Grizzly Lockers are backed by the best warranty in the business! Yukon covers the replacement unit and covers any collaterally damaged parts and associated labor, up to $2,000! This locker also fits 9.5″ & 10″ dropouts.

Product Features:
  • Fits Ford 9″ with 35 spline axles and loadbolt housing
  • Patented internal design reduces common locker failures
  • 8620 internals for added strength
  • Assembled in the USA
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Dorman – Differential Clutch Kit (Part No.697-780)

Differential Clutch Kit

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$262.99
This differential disc kit is a low-cost, time-saving repair solution for the posi-traction function. They are designed to match the fit and performance of the original disc on specific vehicle years, makes and models.

Product Features:
  • Direct replacement – this differential clutch kit provides the necessary components for repairing the original equipment on specific vehicles.
  • Quality materials – all components are built for reliable longevity and performance.
  • Smart solution – provides original equipment fit and function for a competitive price compared to original manufacturer
  • Trustworthy quality – backed by team of designers and engineers in the United States
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Yukon Gear – Bearing Race Driver (Part No.56019)

Bearing Race Driver

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$219.99
Bearing race driver. No return.

Product Features:
  • Bearing race driver
  • Fits LM104911 race
  • All steel construction
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Yukon Gear – Pinion Install Kit For Ford Daytona 9" Differential (Part No.13049)

Pinion Install Kit For Ford Daytona 9" Differential

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$225.99
Yukon Pinion installation kits are a terrific solution for gear installation on lower mileage vehicles where the carrier bearings & races can be reused. This kit uses Timken bearings and races along with a high quality pinion seal and small parts. Included in this kit are the pinion bearings and races, pilot bearing (if applicable), crush sleeve (if applicable), complete pinion shim kit, pinion nut, thread locker, and marking compound with brush. Yukon does extensive research for each application to make sure your kit will arrive with all the correct parts you need to install your pinion gear.

Product Features:
  • Fits Ford 9″ with Daytona pinion support
  • Included are pinion bearings and races, pinion seal, crush sleeve eliminator , complete pinion shim kit, and marking compound with brush.
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Pro-King – Differential Internal Nest Kit (Part No.761A717)

Differential Internal Nest Kit

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$309.99
Pro-King is the leading supplier of transmission and driveline products in the aftermarket.

Product Features:
  • All products are designed to meet or exceed OE quality, form, fit and funtion.
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Yukon Gear – Cover Bolt For Ford 7.5", 8.8" & 9.75" (Part No.33554)

Cover Bolt For Ford 7.5", 8.8" & 9.75"

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$6.99
Yukon 1541H alloy replacement rear axle for Dana 60, 70, and 80, 35 spline. (40″ to 43.5″) Full float axle (8×3.96″ ). Yukon 1541H alloy axles offer a strength increase over stock while retaining a low cost. Yukon 1541H alloy rear axles come with a one year warranty against manufacturing defects. This is a full-floating axle.

Product Features:
  • 35 spline
  • 8 x 3.96″ bolt pattern
  • Cut to length design fits 40″-43.5″ applications
  • Fits Dana Spicer 60, 70 and 80
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National – Shaft Repair Sleeve (Part No.99157)

Shaft Repair Sleeve

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$37.49
National® has built a reputation as one of the most respected names in the industry. We have offered premium sealing solutions for more than 75 years. Our design team keeps pace with the industry and provides advanced solutions for today’s vehicles.

Product Features:
  • Designed to repair damaged, grooved or worn shafts
  • Durable stainless steel construction for corrosion-free sealing surface that surpasses most original shaft specifications
  • Ideal for a shaft where indications of seal wear, such as tracks or grooves have developed
  • Ultra-thin construction (0.01/0.25mm wall thickness) allows original seal size to be used with minimal additional lip loading
  • Easy to install with removable flange and installation tool
  • Installation tool reduces sleeve distortion and allows for installation without removal from the shaft
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ARP Auto Racing – For Use With Ford 8.8 And 9" Using 3/4"Socket, 0.75"L Under Head, 7/16"-20 (Part No.250-3003)

For Use With Ford 8.8 And 9" Using 3/4"Socket, 0.75"L Under Head, 7/16"-20

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$34.99
The tremendous shock loads generated at launch by most any drag racing vehicle equipped with today sticky tire compounds or the acceleration and deceleration of oval track cars put considerable strain on the ring gear. For this reason, the fastener experts at ARP have developed the Pro Series ring gear bolts. they are forged from premium grade 8740 chrome moly steel and are heat treated to a nominal rating of 200,000 PSI tensile strength. Specially hardened, precision ground washers are included where required. Available to fit most any ring gear setup ranging from popular 9 Inch Ford GM 10 and 12 bolt rear ends to the beefy strange differentials found in top fuel and funny car applications.

Product Features:
  • Forged From Premium Grade 8740 Chrome Moly Steel
  • Heat Treated
  • Nominally Rated At 200,000 Psi Tensile Strength
  • Specially Hardened, Precision Ground Washers
  • 0.75″ Underhead Length
  • 200,000 PSI
  • Sold As A Set
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Pro-King – Differential Cross Shaft (Part No.742G930)

Differential Cross Shaft

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$2.79
Pro-King is the leading supplier of transmission and driveline products in the aftermarket.

Product Features:
  • All products are designed to meet or exceed OE quality, form, fit and funtion.
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Powertrax – No-Slip Traction System (Part No.9206902800)

No-Slip Traction System

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$551.99
For vehicles that are driven daily, the Powertrax No-Slip Traction System is the latest design in quiet traction-adding differential technology. It combines the automatic street-friendly smooth operation of a limited-slip differential with the traction performance of a locking differential. The Powertrax No-Slip locker easily installs in to your differential carrier using basic tools and without affecting your ring and pinion settings. Powertrax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Powertrax Grip-Pro and Grip-LS performance limited slips offer smooth dependable torque transfer and traction for the best of both worlds!The Powertrax® Lock-Right Locker provides outstanding traction for off-road machines and race vehicles. Powertrax No-Slip Traction Systems deliver excellent performance to street-driven cars and trucks.
  • Powertrax® lockers range from the original, Lock-Right for serious straight-line performance, to the No-Slip traction system for street-able vehicles.
  • Powertrax® offers three levels of GRIP locking differentials, ranging from the clutch-type GRIP LS with a forged steel case, the gear-driven GRIP PRO and finally the GRIP LOK for extreme traction.
  • Powertrax® = Extreme Traction Systems!
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    Motive Gear – Differential Pinion Shim Kit (Part No.WAA4663)

    Differential Pinion Shim Kit

    from

    $15.99
    All Motive Gear products are engineered for their specific application and manufactured in state of the art facilities. All of our products undergo rigid quality control processes to insure proper fit, performance and longevity. Motive Gear products can be found in the winners circle at NHRA, IHRA, NMRA, NMCA, SODA, SCORE, BITD, Ultra-4 and NASCAR events because we offer unmatched selection and quality demanded by racers and their crew chiefs – the same quality and selection demanded by DIY customers and top mechanics. With four warehouses strategically located across North America, most Motive Gear orders arrive within 2-4 days. Win with Motive Gear!
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    Yukon Gear – 8.5" & 8.2" GM Carrier Installation Kit (Part No.57008)

    8.5" & 8.2" GM Carrier Installation Kit

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    $109.99
    Yukon Carrier installation kits are great, low cost kit for carrier changes such as Positraction or locker upgrades. Carrier installation kit for GM 8.2″ & 8.5″ differential. This kit contains carrier bearings, races and shims.

    Product Features:
    • Fits GM 7.5″, 7.625″ 8.2″ and 8.5″
    • Includes carrier bearings and races and “super” carrier shim kit
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    Motive Gear – Performance Differential Ring and Pinion (Part No.F890300)

    Performance Differential Ring and Pinion

    from

    $262.99


    Product Features:
    • FRD 9″ R & P 3:00 RATIO
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    Felpro – Differential Cover Gasket (Part No.RDS 55081)

    Differential Cover Gasket

    from

    $15.79
    Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

    Product Features:
    • Meets or exceeds all original equipment specifications
    • Application specific design to ensure a perfect fit
    • Unsurpassed quality you can trust
    • Validated for fit, form and function
    • Each Fel-Pro gasket, no matter how small, is engineered to exacting standards with proprietary design, engineering and manufacturing processes
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    Powertrax – Lock Right Locker (Part No.1830-LR)

    Lock Right Locker

    from

    $444.99
    The Powertrax Lock-Right ultra-strength alloy locker’s straight-line performance is equal to a solid spool, but automatically unlocks in turns. Best suited for extreme off-road to severe on-road use, Powertrax Lock Right lockers replace the spider gears in your open differential carrier using basic tools and without affecting your ring and pinion settings. The whole job can be done in your driveway in a couple of hours, pin included! Powertrax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Powertrax Grip-Pro and Grip-LS performance limited slips offer smooth dependable torque transfer and traction for the best of both worlds!The Powertrax® Lock-Right Locker provides outstanding traction for off-road machines and race vehicles. Powertrax No-Slip Traction Systems deliver excellent performance to street-driven cars and trucks.
  • Powertrax® lockers range from the original, Lock-Right for serious straight-line performance, to the No-Slip traction system for street-able vehicles.
  • Powertrax® offers three levels of GRIP locking differentials, ranging from the clutch-type GRIP LS with a forged steel case, the gear-driven GRIP PRO and finally the GRIP LOK for extreme traction.
  • Powertrax® = Extreme Traction Systems!
  • See More

    Motive Gear – Differential Bearing Kit – Timken (Part No.RA310RAT)

    Differential Bearing Kit - Timken

    from

    $106.99
    Motive Gear Differential Bearing Kits Include Front & Rear Pinion Bearing, Pinion Seal, Carrier Bearings, Pilot Bearing Where Applicable, Gear Marking Compound, Crush Sleeve, Pinion Nut, Brush, Thread Locking Compound And Cover Gasket Or Rtv

    Product Features:
    • FORD 8″ BRG.KIT W/AUBURN & TRUETRAC TIMEKEN
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    USA Standard Gear – Standard Spider Gear Set For Ford 9", 31 Spline, 4-Pinion Design (Part No.39018)

    Standard Spider Gear Set For Ford 9", 31 Spline, 4-Pinion Design

    from

    $249.99
    Product Features:
    • Spider gear kit
    • Fits Ford 9″ 31 spline open differential
    • Includes two side gears, four pinion gears, cross pin shaft, roll pins and spider gear thrust washers.
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    Yukon Gear – Steel Cover For Ford 8.8" (Part No.32328)

    Steel Cover For Ford 8.8"

    from

    $99.99
    Yukon outer stub axle for Chrysler 9.25″ front. This axle uses a 1485 u/joint and has 33 splines.

    Product Features:
    • Fits Ford 8.8″
    • Steel
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    Yukon Gear – 7.5" Ford Notched Cross Pin Shaft (Part No.33430)

    7.5" Ford Notched Cross Pin Shaft

    from

    $84.99
    7.5″ Ford notched cross pin shaft. Not Auburn gear. This cross pin shaft is not compatible with Powertrax Lock Rights or Spartan Lockers.

    Product Features:
    • Notched cross pin shaft for Ford 7.5″
    • 3.73 and up ratios
    • Not compatible with Spartan Locker or Powertrax Lock Right
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    Motive Gear – Differential Pinion Nut (Part No.379570S)

    Differential Pinion Nut

    from

    $6.49
    All Motive Gear products are engineered for their specific application and manufactured in state of the art facilities. All of our products undergo rigid quality control processes to insure proper fit, performance and longevity. Motive Gear products can be found in the winners circle at NHRA, IHRA, NMRA, NMCA, SODA, SCORE, BITD, Ultra-4 and NASCAR events because we offer unmatched selection and quality demanded by racers and their crew chiefs – the same quality and selection demanded by DIY customers and top mechanics. With four warehouses strategically located across North America, most Motive Gear orders arrive within 2-4 days. Win with Motive Gear!
    See More

    Yukon Gear – 8" & 9" Ford 5-Tab Clutches (Part No.16028)

    8" & 9" Ford 5-Tab Clutches

    from

    $374.99
    8″ & 9″ Ford 5-Tab clutches (early Equalock).

    Product Features:
    • Clutch kit
    • Fit Ford 9″ Equa Loc positraction
    • 5 outer tabs
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    Yukon Gear – Super Carrier Shim Kit For Ford 7.5", GM 7.5", 8.2" & 8.5" (Part No.55001)

    Super Carrier Shim Kit For Ford 7.5", GM 7.5", 8.2" & 8.5"

    from

    $59.99
    Product Features:
    • Super carrier shim kit for Ford 7.5″, GM 7.5″, 7.625″, 7.6″ IFS, 7.6″ IRS, 7.75″, 8.2″, 8.2″ Buick, Oldsmobile and Pontiac and GM 8.5″ front and rear
    • Interlocking design makes installation much easier
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    Yukon Gear – 8" Ford Pilot Bearing Retainer (Part No.33254)

    8" Ford Pilot Bearing Retainer

    from

    $13.99
    8″ Ford pilot bearing retainer.

    Product Features:
    • Pilot bearing retainer for Ford 8″
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    USA Standard Gear – Standard Spider Gear Set For Ford 8.8", 28 Spline (Part No.39015)

    Standard Spider Gear Set For Ford 8.8", 28 Spline

    from

    $209.99
    Product Features:
    • Spider gear kit
    • Fits Ford 8.8″ 28 spline open differential
    • Includes two side gears, two pinion gears, cross pin shaft, cross pin bolt and spider gear thrust washers.
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    Yukon Gear – Pinion Gear And Thrust Washer For 8" And 9" Ford, Model 20, And 7.25" Chrysler (Part No.33301)

    Pinion Gear And Thrust Washer For 8" And 9" Ford, Model 20, And 7.25" Chrysler

    from

    $4.99
    Pinion gear thrust washer for 8″ and 9″ Ford, Model 20, and 7.25″ Chrysler.

    Product Features:
    • Pinion gear thrust washer for Ford 8″, Ford 9″ and Chrysler 7.25″
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    Yukon Gear – Side Gear And Thrust Washer (0.750" Shaft) For 8.8" Ford (Part No.33298)

    Side Gear And Thrust Washer (0.750" Shaft) For 8.8" Ford

    from

    $6.99
    Side gear thrust washer (0.750″ shaft) for 8.8″ Ford.

    Product Features:
    • Side gear thrust washer for Ford 8.8″
    • 0.750″ diameter cross pin shaft applications only
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    Pro-King – Differential Cover Gasket (Part No.762B303)

    Differential Cover Gasket

    from

    $3.99
    Pro-King is the leading supplier of transmission and driveline products in the aftermarket.

    Product Features:
    • All products are designed to meet or exceed OE quality, form, fit and funtion.
    See More

    1991 Mercury Cougar Differentials

    Maybe you’re in the middle of a full rebuild of that 1991 Mercury Cougar. Maybe you just need a couple of Differentials. Either way, Advance Auto Parts has 156 different Differentials in our inventory ranging from $0.99 to $1,566.99. That means you can find the exact parts or products you need to keep that 1991 Mercury Cougar running smoothly.

    Differentials are only as good as their brand. We stock 14 different brands to make sure you have plenty of trusted parts to choose from for your 1991 Mercury Cougar. Royal Purple, Valvoline, and Yukon Gear are just some of the brands we stock. Search for brands you know or compare prices and reviews to help you decide!

    We know you’ll find the perfect Differentials for your 1991 Mercury Cougar, but don’t take our word for it – read our customer ratings and reviews and buy with confidence. Out of the 1,698 reviews in this category, some of the top rated parts include Differential Shaft Lock Bolt with 4.0 stars and Differential Master Bearing Kit – Timken with 4.0 stars.

    So if you’re in the market for aftermarket Differentials to keep your 1991 Mercury Cougar rolling for years to come, look no further. Shop online and have your products shipped direct to your door, or pick up at the nearest Advance Auto Parts location today!

    Differentials Brands To Make Your 1991 Mercury Cougar Last

    Simple repair, complete replacement, or a full rebuild. No matter the job, your 1991 Mercury Cougar demands trusted brand parts and products to keep it running. Many trusted brands of Differentials make up Advance Auto Parts’ inventory, and all are ready to help make your Cougar the best it can be. Be sure to browse some of our top Differentials brands and parts.

    Popular Powertrax Differentials

    We carry Powertrax parts in our stock across Complete Differentials categories, plus more. For a 1991 Mercury Cougar, our most popular Powertrax Differentials include:
    Lock Right Locker
    from $444.99
    (1)
    Lock Right Locker
    Complete Differentials

    FAQs for 1991 Mercury Cougar Differentials

    What are the most purchased Differentials for the 1991 Mercury Cougar?

    Out of 156 Differentials for the 1991 Mercury Cougar, the most popular in our inventory are:
    Flex Fill Transmission & Differential Gear Oil: Full Synthetic 75W-140, 1 Quart
    from $19.99
    This product is not rated
    Flex Fill Transmission & Differential Gear Oil: Full Synthetic 75W-140, 1 Quart
    Differential Oil

    What are the top-rated 1991 Mercury Cougar Differentials?

    Top-rated Differentials for your 1991 Mercury Cougar based on customer reviews/ratings are:
    Differential Shaft Lock Bolt
    from $5.99
    (11)
    Differential Shaft Lock Bolt
    “great”
    Differential Master Bearing Kit - Timken
    from $137.99
    (8)
    Differential Master Bearing Kit – Timken
    “These Timken bearings work great in my 10 second drag car.”
    Bearings
    from $23.99
    (7)
    Bearings
    “Good price”