1966 GMC K1000 Pickup Differentials

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Keep Your 1966 GMC K1000 Pickup in Top Shape with Quality Differentials

Whether you’re repairing or upgrading your Differential, using high-quality parts is key to keeping your 1966 GMC K1000 Pickup looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Differential Oil, Differential Pinion Seals, and Rear Housing Cover Gaskets. 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, Richmond Gear, and Driveworks. For example, National Differentials start at just $9.99 with an average 4.3 star rating. Richmond Gear and Driveworks offer similar pricing and quality, backed by strong customer feedback. With over 230 reviews and a solid 4.4 star average, you can shop with confidence knowing other GMC K1000 Pickup owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1966 GMC K1000 Pickup Differential at Advance Auto Parts is around $118.41, with a range that starts at $5.99 and goes up to $658.99. With 75 options in stock from 10 trusted brands, finding the right fit is easy. Popular picks like Yukon Gear 3 Qt – Penzoil 80W90 Conventional Gear Oil, 15002, Felpro Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket, RDS 6629, and Driveworks Oil Seal, S-5778 start at just $7.99 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 GMC K1000 Pickup in peak condition, inside and out.

Essential 1966 GMC K1000 Pickup Differentials

Motive Gear – Motive Gear Differential Ring and Pinion, D44-456 (Part No.D44-456)

Motive Gear Differential Ring and Pinion, D44-456

from

$185.99
Motive Gear Differential Ring and Pinion, D44-456.
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Richmond Gear – Richmond Gear Differential Pinion Shaft, CSPD44 (Part No.CSPD44)

Richmond Gear Differential Pinion Shaft, CSPD44

from

$26.99
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.
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Powertrax – Powertrax Differential Lock Assembly, 9207883005 (Part No.9207883005)

Powertrax Differential Lock Assembly, 9207883005

from

$551.99
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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Dorman – Dorman Premium Ring and Pinion Master Bearing and Installation Kit, 797-105 (Part No.797-105)

Dorman Premium Ring and Pinion Master Bearing and Installation Kit, 797-105

from

$249.99
If you’re repairing or rebuilding a front or rear differential and want the best performance and longevity from the bearings being replaced, choose this premium differential kit. It includes high-precision bearings manufactured to tighter tolerances and engineered to last longer than common lower-grade bearings that have more backlash when subjected to the torque generated within the differential. This convenient kit also saves the time needed to source individual components. Check the product attributes and fitment details to select the correct premium differential kit for your application.
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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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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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Spicer – Spicer Differential End Yoke, 2-4-8091X (Part No.2-4-8091X)

Spicer Differential End Yoke, 2-4-8091X

from

$104.99
Demand genuine Spicer. Dana design, engineering, testing and manufacturing processes all work in conjunction with one another to ensure unparalleled performance that non-genuine parts simply cannot deliver.
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Felpro – Felpro Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket, RDS 6629 (Part No.RDS 6629)

Felpro Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket, RDS 6629

from

$7.99
Fel-Pro® gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.
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Motive Gear – Motive Gear Differential Ring and Pinion, GM12-373X (Part No.GM12-373X)

Motive Gear Differential Ring and Pinion, GM12-373X

from

$226.99
Motive Gear Differential Ring and Pinion, GM12-373X.
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Motive Gear – Motive Gear Differential Carrier Shim Kit, 1101 (Part No.1101)

Motive Gear Differential Carrier Shim Kit, 1101

from

$8.99
High-quality Differential Carrier Shim Kit
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National – National Bearing Race, 02820 (Part No.02820)

National Bearing Race, 02820

from

$13.49
National Oil Seals & Bearings offer a full line of premium oil seals and bearings.
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Driveworks – Driveworks Tapered Roller Bearing, S-2820 (Part No.S-2820)

Driveworks Tapered Roller Bearing, S-2820

from

$18.49
Driveworks Tapered Roller Bearing, S-2820.
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National – National Bearing Race, 25523 (Part No.25523)

National Bearing Race, 25523

from

$20.29
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, 3954482 (Part No.3954482)

Motive Gear Differential Crush Sleeve, 3954482

from

$5.99
Motive Gear Differential Crush Sleeve, 3954482.
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Motive Gear – Motive Gear Differential Gear Install Kit, GM12IK (Part No.GM12IK)

Motive Gear Differential Gear Install Kit, GM12IK

from

$69.99
Motive Gear Differential Gear Install Kit, GM12IK.
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Powertrax – Powertrax Grip LOK Traction System, LK444430 (Part No.LK444430)

Powertrax Grip LOK Traction System, LK444430

from

$658.99
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, 2413-LR (Part No.2413-LR)

Powertrax Differential Lock Assembly, 2413-LR

from

$442.99
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

Felpro – Felpro Differential Carrier Gasket Round Shaped 10 Bolt Hole Gasket, RDS 4305 (Part No.RDS 4305)

Felpro Differential Carrier Gasket Round Shaped 10 Bolt Hole Gasket, RDS 4305

from

$8.99
Fel-Pro® gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.
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Driveworks – Driveworks Oil Seal, S-8460N (Part No.S-8460N)

Driveworks Oil Seal, S-8460N

from

$8.99
Value-priced seal meets all cataloged application requirements.
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National – National Bearing Race, 02420 (Part No.02420)

National Bearing Race, 02420

from

$9.89
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 Mini Spool, MS12C (Part No.MS12C)

Motive Gear Differential Mini Spool, MS12C

from

$108.99
Motive Gear Differential Mini Spool, MS12C.
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National – National Shaft Repair Sleeve, 99170 (Part No.99170)

National Shaft Repair Sleeve, 99170

from

$47.49
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.
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National – National Shaft Repair Sleeve, 99155 (Part No.99155)

National Shaft Repair Sleeve, 99155

from

$39.49
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.
See More

Motive Gear – Motive Gear Differential Carrier Shim Kit, 1115 (Part No.1115)

Motive Gear Differential Carrier Shim Kit, 1115

from

$18.99
Motive Gear Differential Carrier Shim Kit, 1115.
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Spicer – Spicer Axle Shaft, Dana 44, 620200 (Part No.620200)

Spicer Axle Shaft, Dana 44, 620200

from

$159.99
Genuine Spicer light vehicle axle products are manufactured to the same high standards as original equipment (OE) parts because they are OE parts. That means when an automotive axle part is replaced with a genuine Spicer part, you are getting the same performance and reliability you have come to expect. And because Dana is constantly revolutionizing the technology behind its Dana axles and Spicer products, the replacement car axle or component you purchase today may even exceed the standards set for the original equipment part that you are replacing.
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Richmond Gear – Richmond Gear Differential Pinion Shaft, 80-0269-1 (Part No.80-0269-1)

Richmond Gear Differential Pinion Shaft, 80-0269-1

from

$64.99
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.
See More

Most Popular Differential Oil for 1966 GMC K1000 Pickups

Enhance your 1966 GMC K1000 Pickup with this popular Differential Oil we have in stock, for $44.99.

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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Best-Selling 1966 GMC K1000 Pickup Differential Pinion Seals

Upgrade your K1000 Pickup with one of our 4 best-selling Differential Pinion Seals, earning an average 4.67 stars rating across 8 reviews.

Driveworks – Driveworks Oil Seal, S-8460N (Part No.S-8460N)

Driveworks Oil Seal, S-8460N

from

$8.99
Value-priced seal meets all cataloged application requirements.
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National – National Differential Pinion Seal, 5778 (Part No.5778)

National Differential Pinion Seal, 5778

from

$23.79
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.
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Driveworks – Driveworks Oil Seal, S-5778 (Part No.S-5778)

Driveworks Oil Seal, S-5778

from

$13.99
Value-priced seal meets all cataloged application requirements.
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Motive Gear – Motive Gear Differential Pinion Seal, 5778V (Part No.5778V)

Motive Gear Differential Pinion Seal, 5778V

from

$18.49
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.
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Top-Quality Rear Housing Cover Gaskets for 1966 GMC K1000 Pickups

Choose a high-quality OEM or aftermarket Rear Housing Cover Gasket for GMC K1000 Pickups and enjoy top-notch performance from $7.99.

Felpro – Felpro Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket, RDS 6629 (Part No.RDS 6629)

Felpro Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket, RDS 6629

from

$7.99
Fel-Pro® gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.
See More

Top Picks for 1966 GMC K1000 Pickup Differential Axle Shafts

Invest in one of our 2 durable Differential Axle Shafts for your 1966 GMC, knowing you’re getting trusted brands and expert craftsmanship.

Spicer – Spicer Axle Shaft, Dana 44, 620200 (Part No.620200)

Spicer Axle Shaft, Dana 44, 620200

from

$159.99
Genuine Spicer light vehicle axle products are manufactured to the same high standards as original equipment (OE) parts because they are OE parts. That means when an automotive axle part is replaced with a genuine Spicer part, you are getting the same performance and reliability you have come to expect. And because Dana is constantly revolutionizing the technology behind its Dana axles and Spicer products, the replacement car axle or component you purchase today may even exceed the standards set for the original equipment part that you are replacing.
See More

Richmond Gear – Richmond Gear Differential Pinion Shaft, 80-0269-1 (Part No.80-0269-1)

Richmond Gear Differential Pinion Shaft, 80-0269-1

from

$64.99
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.
See More

Top-Rated Differential Bearings for 1966 GMC K1000 Pickups

Make a smart move for your 1966 GMC K1000 Pickup with products all priced from $7.99 to $33.49.

National – National Taper Bearing Cup, 15245 (Part No.15245)

National Taper Bearing Cup, 15245

from

$9.99
Manufactured with premium-grade steel, National® taper bearing cups feature crowned raceways to ensure even load distribution.
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Driveworks – Driveworks Tapered Roller Bearing, S-LM-603012 (Part No.S-LM-603012)

Driveworks Tapered Roller Bearing, S-LM-603012

from

$7.99
Driveworks Tapered Roller Bearing, S-LM-603012.
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National – National Tapered Roller Bearing Cone, 25577 (Part No.25577)

National Tapered Roller Bearing Cone, 25577

from

$33.49
Manufactured with premium-grade steel, National taper bearing cones feature crowned raceways and rollers to ensure even load distribution.
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National – National Bearing Race, 25523 (Part No.25523)

National Bearing Race, 25523

from

$20.29
Manufactured with premium-grade steel, National taper bearing cups feature crowned raceways to ensure even load distribution.
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Schaeffler – Schaeffler Cup, 15245 (Part No.15245)

Schaeffler Cup, 15245

from

$7.99
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.
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Top-Rated Differential Brands For Your 1966 GMC K1000 Pickup

When it comes to finding the perfect Differential for your 1966 GMC K1000 Pickup, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 10 trusted brands. We carry the most popular Differential brands including Richmond Gear, National, and Driveworks, and more, all known for their exceptional customer ratings (average brand rating of 4.4 stars) and competitive prices, as low as $8.99. Purchasing a Differential from us here at Advance Auto Parts is a smart move for both you and your 1966 GMC K1000 Pickup, providing peace of mind with parts that meet or exceed OEM standards.

Popular Richmond Gear 1966 GMC K1000 Pickup Differentials

If you’re looking for a top-quality Differential for your 1966 GMC K1000 Pickup, Advance Auto Parts has exactly what you need with our selection of Richmond Gear Differentials. We have 2 Richmond Gear Differentials in stock for this fitment, all known for their durability and precision fit. With prices starting at just $350.99 and an average cost of $355.99, you’ll find the perfect Differential for your needs and budget. Richmond Gear Differentials for the 1966 GMC K1000 Pickup come highly rated, with over 3 customer reviews and an impressive average rating of 4.4 stars. Choosing a Richmond Gear Differential from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
Richmond Gear Differential Ring And Pinion, 49-0072-1
from $350.99
(2)
Richmond Gear Differential Ring And Pinion, 49-0072-1
“I have a Chevy Impala 07 that runs on 3 cylinders when not needing the power of 6, and the new plugs have significantly provided an inexpensive tuneup”
Richmond Gear Differential Ring And Pinion, 69-0298-1
from $360.99
(1)
Richmond Gear Differential Ring And Pinion, 69-0298-1
“Best ever!!!’nn”

Top-Quality National 1966 GMC K1000 Pickup Differentials

For those in search of a high-quality Differential for their 1966 GMC K1000 Pickup, 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 $9.99, with an average price of $19.76, giving you a range of options to suit your budget. Backed by over 13 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.
National Tapered Roller Bearing Cone, HM89449
from $25.49
(1)
National Tapered Roller Bearing Cone, HM89449
“This Is The One That Fit My 1971 CHEVY TRUCK 12 BOLT PINION REAR BACK BEARING”
National Taper Bearing Cup, 15245
from $9.99
(8)
National Taper Bearing Cup, 15245
“It fits in Ford. I drove only few hundred miles can’t say much about it.”
National Differential Pinion Seal, 5778
from $23.79
(4)
National Differential Pinion Seal, 5778
“Works well fit right in. Love national seals”

FAQs for 1966 GMC K1000 Pickup Differentials

What are the best-selling Differentials for 1966 GMC K1000 Pickups?

Out of 75 Differentials that fit 1966 GMC K1000 Pickups, the following parts are the top sellers:

What’s the price range for 1966 GMC K1000 Pickup Differentials?

The prices of Differentials for the 1966 GMC K1000 Pickup range from $5.99 up to $658.99 for the most premium parts.

What is the average price of a Differential for a 1966 GMC K1000 Pickup?

The average price for Differentials for the 1966 GMC K1000 Pickup is $118.41. 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.

What are the cheapest Differentials for my 1966 GMC K1000 Pickup?

The cheapest 1966 GMC K1000 Pickup Differentials we carry are:

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

Yes. We stock Differentials for 19 other popular 1966 GMC models. Some of the most popular are 1966 K15/K1500 Pickup Differentials, 1966 Suburban Differentials, 1966 G1000 Series Differentials, 1966 PB1000 Series Differentials, and 1966 I1500 Differentials.

What types of Differentials do you sell for my 1966 GMC K1000 Pickup?

As of 8/2/26, these are some of the most in-demand types of Differentials for a 1966 GMC K1000 Pickup:

Can I get help with 1966 GMC K1000 Pickup Differential orders?

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

What is your return policy for GMC K1000 Pickup Differentials?

Advance Auto Parts keeps returns simple. For new GMC K1000 Pickup Differentials and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.