Mercury Comet Differentials

Your One-Stop Shop For Trusted Mercury Comet Differentials

If you’re in search of Mercury Comet Differentials aftermarket or OEM parts, consider your search over! Advance Auto Parts carries 370 Differentials from top brands with prices ranging from $1.99 to $1,566.99.

Beyond great prices, we stock trusted brands manufacturing all types of Differentials for your Mercury Comet.

And don’t forget to read customer reviews across all Differentials categories in our catalog. Buy with confidence by leveraging past customer experiences of our aftermarket and OEM parts.

At Advance Auto Parts, we don’t think top quality Differentials have to cost top dollar, and we prove it. Browse our top Mercury Comet Differentials below, order online to ship to your home, or head into your nearest Advance Auto Parts location to get started.

Please Select your Vehicle to See Exact Fit Parts

Essential Mercury Comet Differentials

Powertrax – No-Slip Traction System (Part No.9206902800)

No-Slip Traction System

from

$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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    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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    Yukon Gear – Crush Sleeve (Part No.33085)

    Crush Sleeve

    from

    $9.99
    Crush Sleeve for Model 20, Ford 10.25″, 10.5″, 7.5″, 8.8″, 9 3/8″, 9″ & 9.75″. .480″ long.

    Product Features:
    • Crush sleeve for AMC Model 20, Ford 10.25″, 10.5″, 7.5″, 8.8″, 9″ and 9.75″
    • 0.480″ tall
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    Yukon Gear – One (1) Specialty Bearing Race To Adapt Small Bearing Journal Into A 3.250" Dropout (Part No.32157)

    One (1) Specialty Bearing Race To Adapt Small Bearing Journal Into A 3.250" Dropout

    from

    $51.99
    One (1) specialty bearing race to adapt small bearing journal into a 3.250″ dropout. This adapter allows the use of a 28 or 31 spline carrier, positraction or locker in a 3.250″ dropout. This is a perfect solution if you are currently running 28 or 31 spline axles but are looking to upgrade to 35 spline later, or are stepping down from 35 spline but don’t want to buy a new dropout.

    Product Features:
    • Carrier race
    • Fits Ford 9″
    • Conversion race to install small bearing carrier into 3.250″ dropout
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    USA Standard Gear – Master Overhaul Kit for the Ford 8" Differential (Part No.37028)

    Master Overhaul Kit for the Ford 8" Differential

    from

    $275.99
    USA Standard Master Overhaul kits let you finish your install with confidence. This kit uses Koyo bearings and races. Included are carrier bearings and races, pinion bearings and races, pinion seal, complete shim kit, ring gear bolts, pinion nut, crush sleeve (if applicable), oil baffles and slingers (if applicable), threading locking compound, marking compound with brush and gasket.

    Product Features:
    • Fits Ford 8″
    • Uses Koyo bearings and races
    • Included are carrier bearings and races, pinion bearings and races, pinion seal, complete shim kit, ring gear bolts, pinion nut, crush sleeve, thread locker, marking compound with brush and gasket.
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    Richmond Gear – Differential Cross Shaft (Part No.CSPF9)

    Differential Cross Shaft

    from

    $26.49
    Richmond Gear is the leading manufacturer of professional quality, high-performance drivetrain products. Our complete line of products ranges from high performance ring-and-pinion sets for serious street and racing applications to torque-hungry manual transmissions and components. Richmond Gear products have been winners both at the Daytona 500 and U.S. Nationals for decades. WINNERS RUN RICHMOND!

    Product Features:
    • For over 80-years, the Richmond Double-Diamond logo has represented some of the highest quality gears in the racing industry. Winners Run Richmond!
    • The superior quality of Richmond gearsets is a result of outstanding design, world class manufacturing and an extensive testing process that is performed on all products.
    • Richmond performance gearsets have been winners for decades at: NHRA, NMRA, NMCA, Daytona 500, WISSOTA and U.S. Nationals.
    • Richmond Gear is a leading manufacturer of high performance ring and pinion gearsets and drivetrain components, backed by a two year warranty.
    • Engineered to perform faster and be more reliable, Richmond performance drivetrain products are the result of a continuous research and development program combined with state-of-the-art manufacturing capabilities.
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    National – Tapered Roller Bearing Cone (Part No.HM89443)

    Tapered Roller Bearing Cone

    from

    $38.99
    Manufactured with premium-grade steel, National taper bearing cones feature crowned raceways and rollers to ensure even load distribution.

    Product Features:
    • PREMIUM MATERIALS – Precision manufactured using premium-grade steel for outstanding durability and performance
    • SMOOTH ROTATION – Crowned raceways and rollers for even load distribution
    • OE-STYLE DESIGN – Engineered to meet OE specifications
    • COMPREHENSIVE COVERAGE – Industry-leading coverage for domestic and import applications
    • RIGOROUS TESTING – Comprehensive testing throughout design and development processes by National engineers for quality you can count on
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    Yukon Gear – Pinion Nut (Part No.33154)

    Pinion Nut

    from

    $7.99
    Pinion nut for Ford 7.5″, 8″, 8.8″, 9 3/8″ & 9″. 1 1/6″ socket, 3/4″ x 20 thread.

    Product Features:
    • Pinion nut for Ford 7.5″, 8″ and 9″
    • 3/4″ x 20 thread
    • 1 1/6″ socket
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    Yukon Gear – The Carrier Bearing Puller (Part No.56072)

    The Carrier Bearing Puller

    from

    $883.99
    The Yukon carrier bearing Puller works with an impact gun to quickly and safely remove carrier bearings without damaging them. This unit comes with a handy bench top stand and works with up to one ton applications including Dana 70HD, Dana 80, 10.25″ & 10.5″ Ford, or GM & Chrysler 11.5″ differentials.

    Product Features:
    • Carrier bearing puller
    • Works with an impact gun to safely and easliy remove carrrier bearings
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    Schaeffler – Shaft Seal (Part No.SS2934)

    Shaft Seal

    from

    $21.79
    Our wheel seals are engineered using only the highest-quality materials to meet vehicle manufacturer specificatons. We work with suppliers to design seals that meet FAG’s quality standards. Seals are designed to protect wheel end components from contamination – such as dirt, dust, and moisture – and prevent the loss of grease over the life of the bearing. The specifications for wheel seals are very demanding, and the type required depends on the specific application, position and vehicle class.

    Product Features:
    • High-precision and High-quality components used in all KITs
    • Coverage of classic and new high-tech solutions for the best system coverage
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    Yukon Gear – Bearing Race Driver (Part No.56023)

    Bearing Race Driver

    from

    $219.99
    Bearing race driver. No return.

    Product Features:
    • Bearing race driver
    • Fits M88010 race
    • All steel construction
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    Motive Gear – Differential Gear Install Kit (Part No.F8IK)

    Differential Gear Install Kit

    from

    $44.49
    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!
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    Yukon Gear – Extra HD 3.250" Nodular Iron Dropout For Ford 9" With Load Bolt (Part No.32151)

    Extra HD 3.250" Nodular Iron Dropout For Ford 9" With Load Bolt

    from

    $877.99
    Yukon Extra HD 3.250″ nodular Iron dropout for Ford 9″ with load bolt. Yukon nodular iron dropouts feature a 5/8″ cap bolt and forged caps for maximum strength. Load bolt design prevents gear deflection under heavy loads. Rated up to 1400HP!

    Product Features:
    • Fits Ford 9″
    • 3.250″ carrier race diameter
    • Nodular iron for added strength
    • Load-bolt design reduces ring gear deflection under high horsepower
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    Yukon Gear – 3.062" Side Adjuster For Ford 9" (Part No.32139)

    3.062" Side Adjuster For Ford 9"

    from

    $94.99
    3.062″ side adjuster, Only Fits Yukon Ford 9″ Drop Out, new design ONLY.

    Product Features:
    • Side adjuster
    • Fits Ford 9″
    • 3.062″ designs only
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    Yukon Gear – Trac Loc Spring For Ford 9" & 8" (Part No.33518)

    Trac Loc Spring For Ford 9" & 8"

    from

    $8.99
    Product Features:
    • Trac Loc spring for Ford 8″ and 9″
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    Schaeffler – Cone (Part No.KL44649)

    Cone

    from

    $13.29
    With advanced load-carrying capacity and compact design, tapered roller bearings are used in wheel bearings, transmissions, differentials, transfer cases and other miscellanous applications. FAG manufacturers over 100 million tapered roller bearings annually.

    Product Features:
    • High-precision and High-quality components used in all KITs
    • Coverage of classic and new high-tech solutions for the best system coverage
    See More

    Yukon Gear – Standard Open Spider Gear Kit For 9" Ford With 31 Spline Axles And 2-Pinion Design (Part No.16033)

    Standard Open Spider Gear Kit For 9" Ford With 31 Spline Axles And 2-Pinion Design

    from

    $301.99
    Yukon standard open spider gear kit for 9″ Ford with 31 spline axles and 2-pinion design. Yukon uses higher quality materials and better techniques than OEM to ensure a longer lasting spider gear set. All components come with a one year warranty against manufacturing defects.

    Product Features:
    • Spider gear kit
    • Fits Ford 9″ open differential with 31 spline axles
    • Includes two side gears, two pinion gears, cross pin shaft, roll pin and spider gear thrust washers.
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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 – Purple Aluminum Pinion Support For 9" Ford Daytona (Part No.32036)

    Purple Aluminum Pinion Support For 9" Ford Daytona

    from

    $264.99
    Product Features:
    • Fits Ford 9″ with 28 spline pinion
    • Larger inner pinion bearing reduces gear deflection under high load
    • Races installed
    • 6061 aluminum
    • Annodized purple
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    Yukon Gear – Short Cross Pin Shaft Without Block For 9" Ford (Part No.33335)

    Short Cross Pin Shaft Without Block For 9" Ford

    from

    $11.99
    Short cross pin shaft without block for 9″ Ford.

    Product Features:
    • Cross pin shaft
    • Fits Ford 9″
    • Short design
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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 – Outer Oil Slinger For Ford 7.5", 8.8", 9", 10.25" (Part No.33022)

    Outer Oil Slinger For Ford 7.5", 8.8", 9", 10.25"

    from

    $8.99
    Replacement outer oil slinger for Ford 7.5″, 8.8″, 9″, 10.25″, Nissan Titan rear, Dana 44 Rubicon & 44 JK non-Rubicon.

    Product Features:
    • Outer oil slinger for Ford 10.25″, 7.5″, 8.8″ and 9″ also Jeep JK and Nissan Titan rear
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    Richmond Gear – Differential Spool (Part No.81-0928-1)

    Differential Spool

    from

    $259.99
    Richmond Gear is the leading manufacturer of professional quality, high-performance drivetrain products. Our complete line of products ranges from high performance ring-and-pinion sets for serious street and racing applications to torque-hungry manual transmissions and components. Richmond Gear products have been winners both at the Daytona 500 and U.S. Nationals for decades. WINNERS RUN RICHMOND!

    Product Features:
    • For over 80-years, the Richmond Double-Diamond logo has represented some of the highest quality gears in the racing industry. Winners Run Richmond!
    • The superior quality of Richmond gearsets is a result of outstanding design, world class manufacturing and an extensive testing process that is performed on all products.
    • Richmond performance gearsets have been winners for decades at: NHRA, NMRA, NMCA, Daytona 500, WISSOTA and U.S. Nationals.
    • Richmond Gear is a leading manufacturer of high performance ring and pinion gearsets and drivetrain components, backed by a two year warranty.
    • Engineered to perform faster and be more reliable, Richmond performance drivetrain products are the result of a continuous research and development program combined with state-of-the-art manufacturing capabilities.
    See More

    Yukon Gear – Pinion Install Kit For Ford Daytona 9" Differential (Part No.13049)

    Pinion Install Kit For Ford Daytona 9" Differential

    from

    $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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    Yukon Gear – Standard Open Carrier Case – Ford 9" (Part No.20078)

    Standard Open Carrier Case - Ford 9"

    from

    $264.99
    9″ standard Open case, bare, 28 & 31 spline, 2 or 4 pinion.

    Product Features:
    • Standard open carrier case
    • Fits Ford 9″ with 28 or 31 spline axles
    • Does not include spider gears
    See More

    Differentials Brands You Can Trust For Your Mercury Comet

    13 trusted brands of Differentials line our shelves, ready to help keep your Mercury Comet running smooth. Below are some of the most popular brands and their top Differentials offerings:

    Popular Felpro Differentials

    Felpro products for the Mercury Comet span several categories. Some of the highest-rated Felpro Differentials that will fit your Mercury Comet are:
    Differential Carrier Gasket Oval Shaped 10 Bolt Hole Gasket
    from $9.99
    (9)
    Differential Carrier Gasket Oval Shaped 10 Bolt Hole Gasket
    Automatic Transmission Differential Cover Gaskets

    Top Mercury Comet Differentials from National

    Your Mercury Comet will be purring again thanks to National brand Differentials available for online order or in-store pick up. Popular National parts include:
    Multi-Purpose Bearing
    from $16.99
    (25)
    Multi-Purpose Bearing
    Differential Bearings
    Multi-Purpose Seal
    from $12.99
    (2)
    Multi-Purpose Seal
    Differential Pinion Seals
    Shaft Repair Sleeve
    from $43.99
    (2)
    Shaft Repair Sleeve
    Differential Pinion Pilot Bearings

    Most Purchased Mercury Comet Differentials from Yukon Gear

    When you buy the most frequently purchased Yukon Gear brand Differentials, you can be confident it will be the right part for your Mercury Comet. Here are the Yukon Gear Differentials Advanced Auto customers buy the most:
    3 Qt - 80W90 Conventional Gear Oil With Posi Additive
    from $57.99
    This product is not rated
    3 Qt – 80W90 Conventional Gear Oil With Posi Additive
    Differential Oil
    Multi-Purpose Bearing
    from $16.99
    (25)
    Multi-Purpose Bearing
    Differential Bearings
    3 Qt - Penzoil 80W90 Conventional Gear Oil
    from $44.99
    This product is not rated
    3 Qt – Penzoil 80W90 Conventional Gear Oil
    Differential Oil

    FAQs for Mercury Comet Differentials

    What are the most purchased Differentials for the Mercury Comet?

    Out of 370 Differentials for the Mercury Comet, the most popular in our inventory are:
    Taper Bearing Cone
    from $15.49
    (5)
    Taper Bearing Cone
    Differential Bearings
    3 Qt - 80W90 Conventional Gear Oil With Posi Additive
    from $57.99
    This product is not rated
    3 Qt – 80W90 Conventional Gear Oil With Posi Additive
    Differential Oil
    3 Qt - Penzoil 80W90 Conventional Gear Oil
    from $44.99
    This product is not rated
    3 Qt – Penzoil 80W90 Conventional Gear Oil
    Differential Oil

    What are the top-rated Mercury Comet Differentials?

    Top-rated Differentials for your Mercury Comet based on customer reviews/ratings are:
    Tapered Roller Bearing Cone
    from $38.99
    (2)
    Tapered Roller Bearing Cone
    “nice finish and function. Should perform well.”
    No-Slip Traction System
    from $551.99
    (1)
    No-Slip Traction System
    “Installed, no issues, works great.”
    Differential Crush Sleeve
    from $2.79
    (1)
    Differential Crush Sleeve
    “High quality, would buy again”