1966 Oldsmobile Cutlass Differentials

Keep Your 1966 Oldsmobile Cutlass in Top Shape with Quality Differentials

Whether you’re repairing or upgrading your Differential, using high-quality parts is key to keeping your 1966 Oldsmobile Cutlass looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Rear Differential Cover Gaskets, Differential Covers, and Differential Pinion Seals. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.

Top-Rated Differentials from Trusted Brands

Looking for a reliable Differential? We’ve got you covered with options from brands you know and trust like National, Valvoline, and DriveWorks. For example, National Differentials start at just $7.99 with an average 4.3 star rating. Valvoline and DriveWorks offer similar pricing and quality, backed by strong customer feedback. With over 44 reviews and a solid 4 star average, you can shop with confidence knowing other Oldsmobile Cutlass owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1966 Oldsmobile Cutlass Differential at Advance Auto Parts is around $166.77, with a range that starts at $4.49 and goes up to $929.99. With 58 options in stock from 11 trusted brands, finding the right fit is easy. Popular picks like DEXRON – VI ATF Full Synthetic Automatic Transmission Fluid, 1 Quart, Pinion Nut, and Pinion Seal start at just $4.99 and offer a great balance of form and function.

Explore Related Parts

While you’re upgrading or replacing your Differential, don’t forget to check out other key components like Drive Shafts and Axles and Universal Joints. At Advance Auto Parts, we’re here to help you keep your 1966 Oldsmobile Cutlass in peak condition, inside and out.

Essential 1966 Oldsmobile Cutlass Differentials

Yukon Gear – Ring Gear Bolt (Part No.33046)

Ring Gear Bolt

from

$6.99
Ring gear bolt for GM 12 bolt car & truck, 8.2″, 8.2″ for Buick/Olds/Pontiac, 63-79 Corvette & 55-62 GM Car & Truck. 3/8″ x 24.

Product Features:
  • Ring gear bolt for GM 12 bolt passenger car and truck, 1955-1964 passenger car and truck, GM 8.2″, 8.2″ Buick, Oldsmobile and Pontiac and 1963-1979 Corvette
  • 3/8″ x 24 thread
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Yukon Gear – Bearing Install Kit For GM 8.5" With HD Differential (Part No.11069)

Bearing Install Kit For GM 8.5" With HD Differential

from

$263.99
Yukon Bearing installation kits are perfect for shops & builders who have shims on the shelf and are looking to save cost over a Master Overhaul kit. This kit uses Timken bearings and races along with all high quality small parts. kit includes carrier bearings and races, pinion bearings and races, pinion seal, crush sleeve (if applicable), oil baffles and slingers (if applicable), marking compound and 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 ring & pinion set. This kit is used in 8.5″ differentials using a Yukon Dura Grip, Eaton posi, ValueTrac, True Trac, Pro-Series Auburn, Detroit Locker or standard carrier with large bearing journals.

Product Features:
  • Fits GM 8.5″ rear with aftermarket positraction
  • Included are carrier bearings and races, pinion bearings and races, pinion seal, crush sleeve , marking compound and brush.
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FAG US – Shaft Seal (Part No.SS2776)

Shaft Seal

from

$19.79
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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FAG US – Cup (Part No.M88010)

Cup

from

$11.29
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

Motive Gear – Differential Gear Install Kit (Part No.GM8.5PIK)

Differential Gear Install Kit

from

$59.99


Product Features:
  • 8.5 “P” AXLE MINI INSTALL KIT
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Yukon Gear – Standard Open Spider Gear Kit For Early 7.5" GM With 26 Spline Axles And Large Windows (Part No.16048)

Standard Open Spider Gear Kit For Early 7.5" GM With 26 Spline Axles And Large Windows

from

$149.99
Yukon standard open spider gear kit for early 7.5″ GM with 26 spline axles and large windows. 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 GM 7.5″ open differential with 26 spline axles
  • Includes two side gears, two pinion gears, cross pin shaft, cross pin bolt and spider gear thrust washers.
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Yukon Gear – Minor Install Kit For GM Early And Late 7.5" Differential (Part No.12050)

Minor Install Kit For GM Early And Late 7.5" Differential

from

$115.99
Yukon Minimum installation kits are a low cost solution for gear changes in newer vehicles where the bearings can be reused. This kit uses all high quality components to ensure a smooth set up. kit includes a pinion seal, crush sleeve (if applicable), complete shim kit, marking compound and brush.

Product Features:
  • Fits GM 7.5″ and 7.625″
  • Included are a pinion seal, crush sleeve, complete shim kit, marking compound and brush.
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Powertrax – No-Slip Traction System (Part No.9207822801)

No-Slip Traction System

from

$544.99
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!
  • See More

    Richmond Gear – RngPnn (Part No.79-0099-1)

    RngPnn

    from

    $558.99
    RngPnn

    Yukon Gear – Carrier Installation Kit For GM 8.5" Differential With HD Bearings (Part No.57009)

    Carrier Installation Kit For GM 8.5" Differential With HD Bearings

    from

    $148.99
    Yukon Carrier installation kits are great, low cost kit for carrier changes such as Positraction or locker upgrades. Carrier installation kit for GM 8.5″ differential with HD bearings for large journal carrier. This kit contains carrier bearings, races and shims. This kit is used in 8.5″ differentials using a Yukon Dura Grip, Eaton posi, ValueTrac, True Trac, Pro-Series Auburn, Detroit Locker or standard carrier with large bearing journals.

    Product Features:
    • Fits GM 8.5″ with aftermarket positraction
    • Works with Heavy Duty Bearings
    • Includes carrier bearings and races and “super” carrier shim kit
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    Yukon Gear – Steel Cover For GM 7.5" & 7.625" (Part No.32331)

    Steel Cover For GM 7.5" & 7.625"

    from

    $67.99
    Product Features:
    • Fits GM 7.5″ and 7.625″
    • Steel
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    Yukon Gear – Dura Grip Case, GM 7.5 & 7.625", 3.23 & Up (Part No.20106)

    Dura Grip Case, GM 7.5 & 7.625", 3.23 & Up

    from

    $399.99
    GM 7.5″ & 7.6″ DURA GRIP case, bare, 3.23 & up, 26spline & 28spline.

    Product Features:
    • Dura Grip positraction carrier case
    • Does not include spider gears
    • Fits GM 7.5″ and 7.625″
    • 3.23 and up ratios only
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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 – Bearing Race Driver (Part No.56020)

    Bearing Race Driver

    from

    $215.99
    Bearing race driver. No return.

    Product Features:
    • Bearing race driver
    • Fits M802011 race
    • All steel construction
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    Yukon Gear – Pinion Install Kit For GM 8.5" Differential (Part No.13069)

    Pinion Install Kit For GM 8.5" Differential

    from

    $173.99
    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 GM 8.5″ rear
    • Included are pinion bearings and races, pinion seal, crush sleeve , complete pinion shim kit, and marking compound with brush.
    See More

    National – Bearing Race (Part No.HM804810)

    Bearing Race

    from

    $24.99
    Manufactured with premium-grade steel, National taper bearing cups feature crowned raceways to ensure even load distribution.

    Product Features:
    • PREMIUM MATERIALS – Precision manufactured using premium-grade steel for outstanding durability and performance
    • SMOOTH ROTATION – Crowned raceways 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
    See More

    Yukon Gear – Redline Synthetic "Shock Proof" Oil With Positraction Additive – 4 Quarts (Part No.15005)

    Redline Synthetic "Shock Proof" Oil With Positraction Additive - 4 Quarts

    from

    $148.99
    Redline Synthetic “Shock Proof” Oil with positraction Additive. 4 Quarts.

    Product Features:
    • Includes four quarts of Redline Shockproof oil and one 4oz bottle of Yukon positraction additive
    See More

    Yukon Gear – Redi Sleeve For GM 8.5", 9.5" & 8.2" Bop Yokes (Part No.30229)

    Redi Sleeve For GM 8.5", 9.5" & 8.2" Bop Yokes

    from

    $57.99
    8.5, 9.5, & 8.2 Buick, Oldsmobile, Pontiac GM REDI sleeve yoke saver.Yukon Mighty seal.

    Product Features:
    • Pinion Redi-sleeve
    • Fits GM 8.5″, 9.5″ and 8.2″ Buick, Oldsmobile and Pontiac
    See More

    Yukon Gear – 8.2" & 8.5" Rear Cover Gasket (Part No.23020)

    8.2" & 8.5" Rear Cover Gasket

    from

    $10.99
    8.2″ & 8.5″ rear cover gasket.

    Product Features:
    • Cover gasket
    • Fits GM 8.2″, 8.5″ and 8.6″
    See More

    Motive Gear – Differential Pinion Shim Kit (Part No.1100)

    Differential Pinion Shim Kit

    from

    $7.99
    High-quality Differential Component Shim

    Product Features:
    • SHIM KIT FITS-8.25-F7.5-AMC20-GM0
    See More

    Yukon Gear – Yoke For 8.2" Bop Differential, Mech 3R U/Joint Size, U/Bolt Design (Part No.41185)

    Yoke For 8.2" Bop Differential, Mech 3R U/Joint Size, U/Bolt Design

    from

    $289.99
    Yukon yoke for 8.2″ BOP differential, Mech 3R u/joint size, u/bolt design. All Yukon yokes come with a one year warranty against manufacturing defects.

    Product Features:
    • Fits GM 8.2″ Buick, Oldsmobile and Pontiac
    • 27 spline
    • Mechanics 3R u-joint size
    • Inside snap ring design
    • 2.556″ snap ring span
    • 1.125″ cap diameter
    • Strap style
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    Yukon Gear – Positraction Shim Kit (18 Shims) For GM 8.2", GM 8.5", 12T, 12P, Ford 8.8" & Cast Iron ‘Vette (Part No.16042)

    Positraction Shim Kit (18 Shims) For GM 8.2", GM 8.5", 12T, 12P, Ford 8.8" & Cast Iron 'Vette

    from

    $41.99
    Product Features:
    • Shim kit
    • Fits Ford 8.8″, 1963-1979 Corvette, GM 12 bolt passenger car and truck, 8.2″, 8.5″ and 8.6″ Dura Grip positraction
    See More

    Yukon Gear – 3/8" Ring Gear Bolt Washer For GM 12 Bolt Car & Truck, 8.2 Bop & More (Part No.33347)

    3/8" Ring Gear Bolt Washer For GM 12 Bolt Car & Truck, 8.2 Bop & More

    from

    $4.99
    3/8″ ring gear bolt washer for GM 12 bolt car & truck, 8.2 BOP & more.

    Product Features:
    • Ring gear bolt washer for GM 12 bolt car and truck, 1955-1964 passenger car, 1963-1979 Corvette and 8.2″ Buick, Oldsmobile and Pontiac
    See More

    Dorman – Help – Pinion Crush Sleeves (Part No.81057)

    Pinion Crush Sleeves

    from

    $5.99
    This differential crush sleeve is designed to match the fit and function of the original sleeve on specified vehicles, and is engineered for durability and reliable performance.

    Product Features:
    • Direct replacement – this differential crush sleeve is designed to match the fit and function of the original sleeve on specified vehicles
    • Required replacement – when servicing the differential
    • Durable construction – this part is made from quality materials to ensure reliable performance and long service life
    • Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience
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    Yukon Gear – Crush Sleeve (Part No.33110)

    Crush Sleeve

    from

    $5.99
    Crush sleeve for GM 7.5″, 7.6″, 7.6″ IFS, 8.0″, 8.2″ & 8.2″ Buick/Olds/Pontiac. .625″ long.

    Product Features:
    • Crush sleeve for GM 7.5″, 7.625″, 7.6″ IFS, 8.2″ and 8.2″ Buick, Oldsmobile and Pontiac
    • 0.625″ tall
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    Yukon Gear – Pinion Nut (Part No.33150)

    Pinion Nut

    from

    $11.99
    Pinion nut for GM 12 bolt car & truck, 55-62 car & truck, 8.2″, 8.2″ Buick/Olds/Pontiac & 63-79 Corvette. 1 1/8″ socket, 7/8″ x 16 thread.

    Product Features:
    • Pinion nut for GM 12 bolt car and truck, 8.2″, 8.2″ Buick, Oldsmobile and Pontiac and 1963-1979 Corvette
    • 7/8″ x 16 thread
    • 1 1/8″ socket
    See More

    Yukon Gear – Pinion Nut (Part No.33152)

    Pinion Nut

    from

    $9.99
    Pinion nut for GM 7.2″ IFS, 7.5″, 7.6″, 7.6″ IFS, 8.0″, 8.25″, 8.5″, 8.6″, 9.25″ IFS, 9.5″ & Oldsmobile Dropouts. 1 1/4″ socket, 7/8″ x 14 thread.

    Product Features:
    • Pinion nut for GM 7.2″, 7.5″, 7.625″, 8.0″, 8.25″ IFS, 8.5″, 8.6″, 9.25″ IFS and 9.5″
    • 7/8″ x 14 thread
    • 1 1/4″ socket
    See More

    Motive Gear – Pinion Nut (Part No.1260823)

    Pinion Nut

    from

    $8.49
    Motive Gear offers some of the toughest drive train components on the market today. If you are looking for the largest line of performance ring and pinion gear options available with gear sets in a wide range of ratios for nearly every application, both on and off-road, check out Motive Gear. Motive Gear products can be found in the winner’s circle at racing events worldwide. The superior quality of Motive Gear components is the result of years of racing development, outstanding design and state-of-the-art manufacturing methods. Extensive testing is performed on all products by our in-house engineers.
    See More

    Most Popular Rear Differential Cover Gaskets for 1966 Oldsmobile Cutlasses

    Enhance your 1966 Oldsmobile Cutlass with one of the 2 Rear Differential Cover Gaskets we have in stock, starting at just $11.49.

    Felpro – Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket (Part No.RDS 13410)

    Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket

    from

    $11.49
    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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    Yukon Gear – 8.2" Buick, Oldsmobile, Pontiac Cover Gasket, 10 Bolt Holes (Part No.23019)

    8.2" Buick, Oldsmobile, Pontiac Cover Gasket, 10 Bolt Holes

    from

    $13.99
    8.2″ Buick, Oldsmobile, Pontiac cover gasket, 10 bolt holes.

    Product Features:
    • Cover gasket
    • Fits 8.2″ in Buick, Oldsmobile and Pontiac
    See More

    Best-Selling 1966 Oldsmobile Cutlass Differential Covers

    Upgrade your Cutlass with one of our 2 best-selling Differential Covers.

    Yukon Gear – Chrome Cover For 8.2" Buick, Oldsmobile, And Pontiac GM (Part No.32015)

    Chrome Cover For 8.2" Buick, Oldsmobile, And Pontiac GM

    from

    $74.99
    Product Features:
    • Fits 8.2″ Buick, Oldsmobile and Pontiac
    • Chrome
    See More

    Yukon Gear – Aluminum Girdle Cover For 8.2" Buick, Pontiac, Oldsmobile GM Ta HD (Part No.32120)

    Aluminum Girdle Cover For 8.2" Buick, Pontiac, Oldsmobile GM Ta HD

    from

    $334.99
    Aluminum Girdle cover for 8.2″ Buick, Pontiac, Oldsmobile GM TA HD.

    Product Features:
    • Fits 8.2″ Buick, Oldsmobile and Pontiac
    • Aluminum girdle cover
    See More

    Top-Quality Differential Pinion Seals for 1966 Oldsmobile Cutlasses

    Choose a high-quality OEM or aftermarket Differential Pinion Seal for Oldsmobile Cutlasses and enjoy top-notch performance from $4.99.

    Driveworks – Oil Seal (Part No.S-2043)

    Oil Seal

    from

    $7.99
    Value-priced seal meets all cataloged application requirements.

    Product Features:
    • Brand may vary by location
    See More

    Motive Gear – Pinion Seal (Part No.8610)

    Pinion Seal

    from

    $4.99
    Motive Gear offers some of the toughest drive train components on the market today. If you are looking for the largest line of performance ring and pinion gear options available with gear sets in a wide range of ratios for nearly every application, both on and off-road, check out Motive Gear. Motive Gear products can be found in the winner’s circle at racing events worldwide. The superior quality of Motive Gear components is the result of years of racing development, outstanding design and state-of-the-art manufacturing methods. Extensive testing is performed on all products by our in-house engineers.
    See More

    Yukon Gear – Pinion Seal For GM 8.5", 8.2", Buick, Oldsmobile, And Pontiac (Part No.30017)

    Pinion Seal For GM 8.5", 8.2", Buick, Oldsmobile, And Pontiac

    from

    $9.99
    Pinion seal for GM 8.5″, 8.2″, Buick, Oldsmobile, and Pontiac.Yukon Mighty seal.

    Product Features:
    • Pinion seal
    • Fits GM 8.5″ rear, 8.2″ and 8.2″ in Buick, Oldsmobile and Pontiac
    See More

    FAG US – Shaft Seal (Part No.SS2983)

    Shaft Seal

    from

    $14.29
    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
    See More

    Top Picks for 1966 Oldsmobile Cutlass Differential Bearings

    Invest in one of our 4 durable Differential Bearings for your 1966 Oldsmobile, knowing you’re getting trusted brands and expert craftsmanship.

    National – Multi-Purpose Bearing (Part No.A-36)

    Multi-Purpose Bearing

    from

    $27.99
    Product Features:
    • CONSISTENT PERFORMANCE: Matched cup and cone components ensure consistent performance
    • 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
    See More

    National – Bearing Race (Part No.LM67010)

    Bearing Race

    from

    $4.49
    National Oil Seals & Bearings offer a full line of premium oil seals and bearings.

    Product Features:
    • PREMIUM MATERIALS — Precision manufactured using premium-grade steel for outstanding durability and performance
    • SMOOTH ROTATION — Crowned raceways 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
    See More

    FAG US – Cone (Part No.KM86649)

    Cone

    from

    $24.29
    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

    FAG US – Cup (Part No.LM67010)

    Cup

    from

    $6.69
    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

    Top-Rated Differential Oil for 1966 Oldsmobile Cutlasses

    Make a smart move for your 1966 Oldsmobile Cutlass with products all priced from $14.49 to $148.99.

    Valvoline – DEXRON – VI ATF Full Synthetic Automatic Transmission Fluid, 1 Quart (Part No.822405)

    DEXRON - VI ATF Full Synthetic Automatic Transmission Fluid, 1 Quart

    from

    $14.49
    Valvoline DEXRON-VI/MERCON LV ATF is a full-synthetic transmission fluid formulated with advanced additive technology to meet and exceed the requirements of the General Motors DEXRON-VI specification. It is officially licensed and approved by GM and is fully back-serviceable and can be used wherever DEXRON-II and/or DEXRON-III are recommended. Recommended for use in the following applications: DEXRON-VI, DEXRON-III, DEXRON-II, and Allison C-4.

    Product Features:
    • Formulated with full-synthetic base stocks and advanced additive technology to meet the challenging demands of automatic transmissions
    • Enhanced anti-shudder protection for smooth shifting and maximum power transfer
    • Developed with anti-wear technology to help improve transmission durability
    • Engineered with a proprietary blend of base oils and advanced additives to provide better oil flow at low temperatures and greater film protection at higher temperatures
    See More

    Yukon Gear – Redline Synthetic "Shock Proof" Oil With Positraction Additive – 4 Quarts (Part No.15005)

    Redline Synthetic "Shock Proof" Oil With Positraction Additive - 4 Quarts

    from

    $148.99
    Redline Synthetic “Shock Proof” Oil with positraction Additive. 4 Quarts.

    Product Features:
    • Includes four quarts of Redline Shockproof oil and one 4oz bottle of Yukon positraction additive
    See More

    Yukon Gear – Redline Synthetic "Shock Proof" Oil – 3 Quarts (Part No.15000)

    Redline Synthetic "Shock Proof" Oil - 3 Quarts

    from

    $99.99
    Redline Synthetic “Shock Proof” Oil. 3 Quarts.

    Product Features:
    • Includes three quarts of Redline Shockproof oil
    See More

    Yukon Gear – Redline Synthetic "Shock Proof" Oil – 4 Quarts (Part No.15004)

    Redline Synthetic "Shock Proof" Oil - 4 Quarts

    from

    $137.99
    Redline Synthetic “Shock Proof” Oil. 4 Quarts.

    Product Features:
    • Includes four quarts of Redline Shockproof oil
    See More

    Top-Rated Differential Brands For Your 1966 Oldsmobile Cutlass

    When it comes to finding the perfect Differential for your 1966 Oldsmobile Cutlass, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 11 trusted brands. We carry the most popular Differential brands including Valvoline, National, and DriveWorks, and more, all known for their exceptional customer ratings (average brand rating of 4.8 stars) and competitive prices, as low as $7.99. Purchasing a Differential from us here at Advance Auto Parts is a smart move for both you and your 1966 Oldsmobile Cutlass, providing peace of mind with parts that meet or exceed OEM standards.

    Popular Valvoline 1966 Oldsmobile Cutlass Differentials

    If you’re looking for a top-quality Differential for your 1966 Oldsmobile Cutlass, Advance Auto Parts has exactly what you need with our selection of Valvoline Differentials. We have 1 Valvoline Differentials in stock for this fitment, all known for their durability and precision fit. With prices starting at just $14.49, you’ll find the perfect Differential for your needs and budget. Valvoline Differentials for the 1966 Oldsmobile Cutlass come highly rated, with over 2 customer reviews and an impressive average rating of 4.8 stars. Choosing a Valvoline Differential from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
    DEXRON - VI ATF Full Synthetic Automatic Transmission Fluid, 1 Quart
    from $14.49
    (2)
    DEXRON – VI ATF Full Synthetic Automatic Transmission Fluid, 1 Quart
    “I’ve used this in my 2005 2500HD since I bought the truck with 20k on it now at 280k changed every other year maybe 40k I’d put on in two years, I pu”

    Top-Quality National 1966 Oldsmobile Cutlass Differentials

    For those in search of a high-quality Differential for their 1966 Oldsmobile Cutlass, Advance Auto Parts offers a great selection of National Differentials. With 3 National Differentials in stock, you can trust you’re getting top-tier parts designed for durability and a perfect fit. Prices for these Differentials start at just $7.99, with an average price of $24.66, giving you a range of options to suit your budget. Backed by over 6 customer ratings and an average rating of 4.3 stars, National Differentials provide both reliability and excellent performance. Choosing a National Differential from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.
    Bearing Race
    from $7.99
    (4)
    Bearing Race
    “Goes with M88010 bearing cup. Application was the pinion bearing race for a Ford 9 Inch on a 1957 Ford F-100.”
    Multi-Purpose Bearing
    from $27.99
    (1)
    Multi-Purpose Bearing
    “great price”
    Shaft Repair Sleeve
    from $37.99
    (1)
    Shaft Repair Sleeve
    “Very delicate piece, but came shipped quite safely and not damaged. High quality.”

    FAQs for 1966 Oldsmobile Cutlass Differentials

    What are the best-selling Differentials for 1966 Oldsmobile Cutlasses?

    Out of 58 Differentials that fit 1966 Oldsmobile Cutlasses, the following parts are the top sellers:

    What’s the price range for 1966 Oldsmobile Cutlass Differentials?

    The prices of Differentials for the 1966 Oldsmobile Cutlass range from $4.49 up to $929.99 for the most premium parts.

    What is the average price of a Differential for a 1966 Oldsmobile Cutlass?

    The average price for Differentials for the 1966 Oldsmobile Cutlass is $166.77. Keep in mind the variety of part types within our Differential category, where you are likely to find a wide range of prices across a variety of parts and components.

    Does Advance Auto Parts sell Differentials for other Oldsmobile Cutlass model years?

    Yes, we carry Differentials for 25 model years of Oldsmobile Cutlasses between 1961 and 1999. The following model years are the most popular for Differential purchases: 1999, 1998, 1997, 1988, 1983, 1982, 1981, 1980, and 1979.

    What are the cheapest Differentials for my 1966 Oldsmobile Cutlass?

    The cheapest 1966 Oldsmobile Cutlass Differentials we carry are:

    Does Advance Auto Parts sell Differentials for any other 1966 Oldsmobile models?

    Yes. We stock Differentials for 8 other popular 1966 Oldsmobile models. Some of the most popular are 1966 98 Differentials, 1966 Delta 88 Differentials, 1966 Toronado Differentials, 1966 F85 Differentials, and 1966 Vista Cruiser Differentials.

    What are the top-rated Differentials that fit the 1966 Oldsmobile Cutlass?

    Based on 44 reviews by customers, our 1966 Oldsmobile Cutlass Differentials have an average customer rating of 4 stars. These are the highest-rated categories of Differentials for the 1966 Oldsmobile Cutlass and their top-rated products:

    What types of Differentials do you sell for my 1966 Oldsmobile Cutlass?

    As of 11/2/25, these are some of the most in-demand types of Differentials for a 1966 Oldsmobile Cutlass:

    Can I get help with 1966 Oldsmobile Cutlass Differential orders?

    Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Oldsmobile Differentials and more.

    What is your return policy for Oldsmobile Cutlass Differentials?

    Advance Auto Parts keeps returns simple. For new Oldsmobile Cutlass Differentials and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.