1966 Chrysler 300 Differentials

Please Select your Vehicle to See Exact Fit Parts

Keep Your 1966 Chrysler 300 in Top Shape with Quality Differentials

Whether you’re repairing or upgrading your Differential, using high-quality parts is key to keeping your 1966 Chrysler 300 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 Oil, 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, Motive Gear, and Driveworks. For example, National Differentials start at just $14.99 with an average 4.3 star rating. Motive Gear and Driveworks offer similar pricing and quality, backed by strong customer feedback. With over 282 reviews and a solid 4.1 star average, you can shop with confidence knowing other Chrysler 300 owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1966 Chrysler 300 Differential at Advance Auto Parts is around $144.60, with a range that starts at $2.99 and goes up to $579.99. With 50 options in stock from 9 trusted brands, finding the right fit is easy. Popular picks like Yukon Gear 3 Qt – Penzoil 80W90 Conventional Gear Oil, 15002, Motive Gear Differential Pinion Nut, 1260823, and Motive Gear Differential Crush Sleeve, 3507575 start at just $2.99 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 Spindles and Transfer Cases. At Advance Auto Parts, we’re here to help you keep your 1966 Chrysler 300 in peak condition, inside and out.

Essential 1966 Chrysler 300 Differentials

Driveworks – Driveworks Taper Bearing Set, S-A-6 (Part No.S-A-6)

Driveworks Taper Bearing Set, S-A-6

from

$11.99
Value-priced bearing meets all cataloged application requirements.
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Mr. Gasket – Mr. Gasket Differential Cover Gasket, 81 (Part No.81)

Mr. Gasket Differential Cover Gasket, 81

from

$23.69
Mr. Gasket Axle Housing/Differential Cover or Rear End Gaskets are manufactured from a .047 inch thick cellulose/nitrile composite gasket material for excellent sealing and durability. They are precision die-cut for an excellent fit.
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National – National Bearing Race, HM89410 (Part No.HM89410)

National Bearing Race, HM89410

from

$11.49
Manufactured with premium-grade steel, National taper bearing cups feature crowned raceways to ensure even load distribution.
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Motive Gear – Motive Gear Differential Crush Sleeve, 3507575 (Part No.3507575)

Motive Gear Differential Crush Sleeve, 3507575

from

$2.99
Motive Gear Differential Crush Sleeve, 3507575.
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Powertrax – Powertrax Differential Lock Assembly, 9203923105 (Part No.9203923105)

Powertrax Differential Lock Assembly, 9203923105

from

$557.99
For vehicles that are driven daily, the Power Trax 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 Power Trax No-Slip locker easily installs in to your differential carrier using basic tools and without affecting your ring and pinion settings. Power Trax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Power Trax Grip-Pro and Grip-LS performance limited slips offer smooth dependable torque transfer and traction for the best of both worlds.
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Driveworks – Driveworks Tapered Roller Bearing, S-M-802048 (Part No.S-M-802048)

Driveworks Tapered Roller Bearing, S-M-802048

from

$17.99
Driveworks Tapered Roller Bearing, S-M-802048.
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Richmond Gear – Richmond Gear RngPnn, 69-0046-1 (Part No.69-0046-1)

Richmond Gear RngPnn, 69-0046-1

from

$342.99
Richmond Gear RngPnn, 69-0046-1. DRIVELINE – TRANSMISSION PARTS>DIFFERENTIAL PARTS>RING AND PINION KITS>RING AND PINION KITS from Richmond Gear
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Motive Gear – Motive Gear Differential Internal Carrier Gear Kit, C7.25BI (Part No.C7.25BI)

Motive Gear Differential Internal Carrier Gear Kit, C7.25BI

from

$119.99
Motive Gear Differential Internal Carrier Gear Kit, C7.25BI.
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Motive Gear – "Motive Gear Differential Master Bearing Kit, 8.75"", R8.75ERSMKT" (Part No.R8.75ERSMKT)

"Motive Gear Differential Master Bearing Kit, 8.75"", R8.75ERSMKT"

from

$151.99
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
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Royal Purple – Royal Purple MaxGear SAE 75W140 High Performance Gear Oil w/Friction Modifier Additive, 1 QT, 01301 (Part No.01301)

Royal Purple MaxGear SAE 75W140 High Performance Gear Oil w/Friction Modifier Additive, 1 QT, 01301

from

$28.49
Max Gear is recommended for truck and automotive differentials, outboard motor lower units or in rear axles or manual transmissions requiring an API fluid. Max Gear is a high performance automotive gear oil designed to provide maximum protection to heavily loaded gears while increasing power throughput through the drive train. Max Gear virtually eliminates both gear and bearing wear-even under severe squeeze film conditions caused by extremely high loads, sudden shock loads or low RPMs. Slippery, synthetic molecules not only reduce wear and friction but significantly increase Max Gear’s cold weather fluidity and lubricity, making it the ideal choice for vehicles operating in cold climates. Gears run smoother, quieter, cooler and longer without overhauls. It is noncorrosive to both ferrous and nonferrous metals.
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Motive Gear – Motive Gear Differential Pinion Nut, 1260823 (Part No.1260823)

Motive Gear Differential Pinion Nut, 1260823

from

$10.99
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.
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Motive Gear – Motive Gear Ring And Pinion Installation Kit, C8.75IKE (Part No.C8.75IKE)

Motive Gear Ring And Pinion Installation Kit, C8.75IKE

from

$52.99
Motive Gear Ring And Pinion Installation Kit, C8.75IKE.
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Motive Gear – Motive Gear Competition Yoke, MG1350-8759 (Part No.MG1350-8759)

Motive Gear Competition Yoke, MG1350-8759

from

$254.99
Motive Gear Competition Yoke, MG1350-8759.
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B & M – "B & M Cast Aluminum Differential Cover For Chrysler 9.25"", 10306" (Part No.10306)

"B & M Cast Aluminum Differential Cover For Chrysler 9.25"", 10306"

from

$311.99
Our engineers designed the line of Hi-Tek differential covers to not only look good but address a number of weaknesses of the factory-stamped steel covers. First, they started by constructing the covers of thick A356.0-T6 aluminum, which dissipates heat much faster than the factory steel unit keeping the fluid temperature lower under high-stress loads vs. a steel cover. Then for added durability, we added a reinforced center bar for extra strength along with load bolts to help prevent bearing cap deflection under severe loads. The internal shape of the cover retains the smooth round back internally to help keep the fluid flow going over the ring gear to properly lubricate and cool the bearings and ring & pinion gears. Additional features include a magnetic drain plug for catching ferrous metal particles, a machined B&M logo, and all necessary hardware and easy-to-follow detailed instructions for a quick and simple installation you can do at home.
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Powertrax – Powertrax Differential Lock Assembly, 9203822705 (Part No.9203822705)

Powertrax Differential Lock Assembly, 9203822705

from

$527.99
For vehicles that are driven daily, the Power Trax 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 Power Trax No-Slip locker easily installs in to your differential carrier using basic tools and without affecting your ring and pinion settings. Power Trax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Power Trax Grip-Pro and Grip-LS performance limited slips offer smooth dependable torque transfer and traction for the best of both worlds.
See More

National – National Multi-Purpose Bearing, A-18 (Part No.A-18)

National Multi-Purpose Bearing, A-18

from

$18.29
Manufactured with premium-grade steel, National taper bearing sets feature crowned raceways and rollers to ensure even load distribution.
See More

Powertrax – Powertrax Differential Lock Assembly, 9203923125 (Part No.9203923125)

Powertrax Differential Lock Assembly, 9203923125

from

$579.99
For vehicles that are driven daily, the Power Trax 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 Power Trax No-Slip locker easily installs in to your differential carrier using basic tools and without affecting your ring and pinion settings. Power Trax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Power Trax Grip-Pro and Grip-LS performance limited slips offer smooth dependable torque transfer and traction for the best of both worlds.
See More

Motive Gear – Motive Gear Ring Gear Bolt, 1304 (Part No.1304)

Motive Gear Ring Gear Bolt, 1304

from

$7.99
Motive Gear Ring Gear Bolt, 1304. DRIVELINE – TRANSMISSION PARTS>DIFFERENTIAL PARTS>DIFFERENTIAL PARTS – MISC>DIFFERENTIAL PARTS – MISC from Motive Gear
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Yukon Gear – "Yukon Gear Bolt/Screw for Adjuster Lock for Chrysler 7.25"", 8.25"", 8.75"", 9.25"", 33233" (Part No.33233)

"Yukon Gear Bolt/Screw for Adjuster Lock for Chrysler 7.25"", 8.25"", 8.75"", 9.25"", 33233"

from

$15.99
Yukon Gear & Axle manufactures a full line of top quality small parts to complete any job including ring gear bolts, crush sleeves, pinion nuts and washers, axle studs, thrust washers and much, much more. For all your differential small parts needs, look no further than Yukon.
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Motive Gear – Motive Gear Differential Pinion Seal, 7216 (Part No.7216)

Motive Gear Differential Pinion Seal, 7216

from

$30.99
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

Motive Gear – Motive Gear Differential Pinion Seal, 8516N (Part No.8516N)

Motive Gear Differential Pinion Seal, 8516N

from

$14.99
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

Motive Gear – Motive Gear Differential Pinion Shim Kit, 1104 (Part No.1104)

Motive Gear Differential Pinion Shim Kit, 1104

from

$12.99
Motive Gear Differential Pinion Shim Kit, 1104.
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Motive Gear – Motive Gear Differential Pinion Shim Kit, 1109 (Part No.1109)

Motive Gear Differential Pinion Shim Kit, 1109

from

$13.49
Motive Gear Differential Pinion Shim Kit, 1109.
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Powertrax – Powertrax Grip LS Traction System, LS308229 (Part No.LS308229)

Powertrax Grip LS Traction System, LS308229

from

$505.99
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!
See More

Powertrax – Powertrax Differential Lock Assembly, 1240-LR (Part No.1240-LR)

Powertrax Differential Lock Assembly, 1240-LR

from

$456.99
For vehicles that are driven daily, the Power Trax 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 Power Trax No-Slip locker easily installs in to your differential carrier using basic tools and without affecting your ring and pinion settings. Power Trax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Power Trax Grip-Pro and Grip-LS performance limited slips offer smooth dependable torque transfer and traction for the best of both worlds.
See More

USA Standard Gear – USA Standard Gear Differential Spider Gear Kits, 39034 (Part No.39034)

USA Standard Gear Differential Spider Gear Kits, 39034

from

$239.99
“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.”
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Most Popular Rear Differential Cover Gasket for 1966 Chrysler 300s

Enhance your 1966 Chrysler 300 with this popular Rear Differential Cover Gasket we have in stock, for $23.69.

Mr. Gasket – Mr. Gasket Differential Cover Gasket, 81 (Part No.81)

Mr. Gasket Differential Cover Gasket, 81

from

$23.69
Mr. Gasket Axle Housing/Differential Cover or Rear End Gaskets are manufactured from a .047 inch thick cellulose/nitrile composite gasket material for excellent sealing and durability. They are precision die-cut for an excellent fit.
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Best-Selling 1966 Chrysler 300 Differential Oil

Upgrade your 300 with one of our 2 best-selling Differential Oil.

Yukon Gear – Yukon Gear 3 Qt – Penzoil 80W90 Conventional Gear Oil, 15002 (Part No.15002)

Yukon Gear 3 Qt - Penzoil 80W90 Conventional Gear Oil, 15002

from

$44.99
Union 76 gear oil is a conventional non-synthetic 80W90 formulation designed for all types of differentials.
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Yukon Gear – "Yukon Gear Redline Synthetic ""Shock Proof"" Oil – 4 Quarts, 15004" (Part No.15004)

"Yukon Gear Redline Synthetic ""Shock Proof"" Oil - 4 Quarts, 15004"

from

$137.99
Redline Heavy Shockproof Gear Oil is formulated to provide lasting protection.
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Top-Quality Differential Pinion Seals for 1966 Chrysler 300s

Choose a high-quality OEM or aftermarket Differential Pinion Seal for Chrysler 300s and enjoy top-notch performance from $10.99.

Motive Gear – Motive Gear Differential Pinion Seal, 5126B (Part No.5126B)

Motive Gear Differential Pinion Seal, 5126B

from

$10.99
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

Motive Gear – Motive Gear Differential Pinion Seal, 7216 (Part No.7216)

Motive Gear Differential Pinion Seal, 7216

from

$30.99
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

Motive Gear – Motive Gear Differential Pinion Seal, 8516N (Part No.8516N)

Motive Gear Differential Pinion Seal, 8516N

from

$14.99
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

Our Top Pick for a 1966 Chrysler 300 Differential Cover

Invest in a durable Differential Cover for your 1966 Chrysler, knowing you’re getting trusted brands and expert craftsmanship.

B & M – "B & M Cast Aluminum Differential Cover For Chrysler 9.25"", 10306" (Part No.10306)

"B & M Cast Aluminum Differential Cover For Chrysler 9.25"", 10306"

from

$311.99
Our engineers designed the line of Hi-Tek differential covers to not only look good but address a number of weaknesses of the factory-stamped steel covers. First, they started by constructing the covers of thick A356.0-T6 aluminum, which dissipates heat much faster than the factory steel unit keeping the fluid temperature lower under high-stress loads vs. a steel cover. Then for added durability, we added a reinforced center bar for extra strength along with load bolts to help prevent bearing cap deflection under severe loads. The internal shape of the cover retains the smooth round back internally to help keep the fluid flow going over the ring gear to properly lubricate and cool the bearings and ring & pinion gears. Additional features include a magnetic drain plug for catching ferrous metal particles, a machined B&M logo, and all necessary hardware and easy-to-follow detailed instructions for a quick and simple installation you can do at home.
See More

Top-Rated Differential Bearings for 1966 Chrysler 300s

Make a smart move for your 1966 Chrysler 300 with products all priced from $13.49 to $24.29.

National – National Bearing Race, LM104912 (Part No.LM104912)

National Bearing Race, LM104912

from

$14.99
Manufactured with premium-grade steel, National taper bearing cups feature crowned raceways to ensure even load distribution.
See More

National – National Tapered Roller Bearing Cone, LM104949 (Part No.LM104949)

National Tapered Roller Bearing Cone, LM104949

from

$24.29
Manufactured with premium-grade steel, National taper bearing cones feature crowned raceways and rollers to ensure even load distribution.
See More

Driveworks – Driveworks Tapered Roller Bearing, S-HM-803110 (Part No.S-HM-803110)

Driveworks Tapered Roller Bearing, S-HM-803110

from

$13.49
Driveworks Tapered Roller Bearing, S-HM-803110.
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Top-Rated Differential Brands For Your 1966 Chrysler 300

When it comes to finding the perfect Differential for your 1966 Chrysler 300, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 9 trusted brands. We carry the most popular Differential brands including National, Driveworks, and Motive Gear, and more, all known for their exceptional customer ratings (average brand rating of 4.3 stars) and competitive prices, as low as $2.99. Purchasing a Differential from us here at Advance Auto Parts is a smart move for both you and your 1966 Chrysler 300, providing peace of mind with parts that meet or exceed OEM standards.

Popular National 1966 Chrysler 300 Differentials

If you’re looking for a top-quality Differential for your 1966 Chrysler 300, Advance Auto Parts has exactly what you need with our selection of National Differentials. We have 3 National Differentials in stock for this fitment, all known for their durability and precision fit. With prices starting at just $14.99 and an average cost of $26.26, you’ll find the perfect Differential for your needs and budget. National Differentials for the 1966 Chrysler 300 come highly rated, with over 6 customer reviews and an impressive average rating of 4.3 stars. Choosing a National Differential from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
National Tapered Roller Bearing Cone, LM104949
from $24.29
(3)
National Tapered Roller Bearing Cone, LM104949
“Needed an inner bearing when doing brakes on an old hunting truck.I prefer quality parts over those made in other countries and the price difference w”
National Bearing Race, LM104912
from $14.99
(1)
National Bearing Race, LM104912
“As always, these bearings did the job and last forever. Just happy I found them in stock.”
National Tapered Roller Bearing Cone, HM89443
from $39.49
(2)
National Tapered Roller Bearing Cone, HM89443
“nice finish and function. Should perform well.”

Top-Quality Driveworks 1966 Chrysler 300 Differentials

For those in search of a high-quality Differential for their 1966 Chrysler 300, Advance Auto Parts offers a great selection of Driveworks Differentials. With 1 Driveworks 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 $11.99, giving you a range of options to suit your budget. Backed by over 38 customer ratings and an average rating of 4.2 stars, Driveworks Differentials provide both reliability and excellent performance. Choosing a Driveworks Differential from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.
Driveworks Taper Bearing Set, S-A-6
from $11.99
(38)
Driveworks Taper Bearing Set, S-A-6
“HELPFUL ASSOCIATE”

FAQs for 1966 Chrysler 300 Differentials

What are the best-selling Differentials for 1966 Chrysler 300s?

Out of 50 Differentials that fit 1966 Chrysler 300s, the following parts are the top sellers:

What’s the price range for 1966 Chrysler 300 Differentials?

The prices of Differentials for the 1966 Chrysler 300 range from $2.99 up to $579.99 for the most premium parts.

What is the average price of a Differential for a 1966 Chrysler 300?

The average price for Differentials for the 1966 Chrysler 300 is $144.60. 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 Chrysler 300 model years?

Yes, we carry Differentials for 34 model years of Chrysler 300s between 1955 and 2023. The following model years are the most popular for Differential purchases: 2021, 2020, 2019, 2018, 2017, 2016, 2015, 2014, and 2013.

What are the cheapest Differentials for my 1966 Chrysler 300?

The cheapest 1966 Chrysler 300 Differentials we carry are:

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

Yes. We stock Differentials for 3 other popular 1966 Chrysler models. Some of the most popular are 1966 Town & Country Differentials, 1966 New Yorker Differentials, 1966 Imperial Differentials, and 1966 Newport Differentials.

What types of Differentials do you sell for my 1966 Chrysler 300?

As of 8/2/26, these are some of the most in-demand types of Differentials for a 1966 Chrysler 300:

Can I get help with 1966 Chrysler 300 Differential orders?

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

What is your return policy for Chrysler 300 Differentials?

Advance Auto Parts keeps returns simple. For new Chrysler 300 Differentials and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.