1966 GMC I1500 Differentials
Keep Your 1966 GMC I1500 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 I1500 looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Differential Oil, Rear Housing Cover Gaskets, and Differential Bearings. 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 Driveworks, Felpro, and National. For example, Driveworks Differentials start at just $13.99 with an average 4.2 star rating. Felpro and National offer similar pricing and quality, backed by strong customer feedback. With over 17 reviews and a solid 4.5 star average, you can shop with confidence knowing other GMC I1500 owners approve.
Competitive Prices and Extensive Inventory
The average price for a 1966 GMC I1500 Differential at Advance Auto Parts is around $23.06, with a range that starts at $7.99 and goes up to $44.99. With 13 options in stock from 4 trusted brands, finding the right fit is easy. Popular picks like Yukon Gear 3 Qt – Penzoil 80W90 Conventional Gear Oil, 15002, National Differential Pinion Seal, 5778, and National Tapered Roller Bearing Cone, 02872 start at just $23.79 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 Transfer Cases. At Advance Auto Parts, we’re here to help you keep your 1966 GMC I1500 in peak condition, inside and out.
Find Your Specific 1966 GMC I1500 Differentials
Looking for the perfect Differential for your 1966 GMC I1500? You’re in the right place. Below, you’ll find links to various types of Differentials that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Differentials, ensuring durability and a precise fit for your GMC I1500. Whether you’re driving a 1966 model or another popular model year like
1965, we’ve got you covered. Purchasing Differentials from Advance Auto Parts is a smart choice, giving you access to trusted brands and parts built to perform. Below, you’ll find links to various types of Differentials that fit your vehicle.
Essential 1966 GMC I1500 Differentials
National – National Shaft Repair Sleeve, 99155 (Part No.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.
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National – National Differential Pinion Seal, 5778 (Part No.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)
Felpro – Felpro Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket, RDS 6629 (Part No.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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National – National Bearing Race, 02820 (Part No.02820)
from
$13.49
National Oil Seals & Bearings offer a full line of premium oil seals and bearings.
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National – National Taper Bearing Cup, 31520 (Part No.31520)
from
$13.79
Manufactured with premium-grade steel, National taper bearing cups feature crowned raceways to ensure even load distribution.
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National – National Bearing Race, 25523 (Part No.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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Driveworks – Driveworks Tapered Roller Bearing, S-2820 (Part No.S-2820)
Yukon Gear – Yukon Gear 3 Qt – Penzoil 80W90 Conventional Gear Oil, 15002 (Part No.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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Driveworks – Driveworks Tapered Roller Bearing, S-2872 (Part No.S-2872)
National – National Tapered Roller Bearing Cone, 02872 (Part No.02872)
from
$24.99
National Oil Seals & Bearings offer a full line of premium oil seals and bearings.
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Driveworks – Driveworks Tapered Roller Bearing, S-31594 (Part No.S-31594)
National – National Tapered Roller Bearing Cone, 31594 (Part No.31594)
from
$34.49
Manufactured with premium-grade steel, National taper bearing cones feature crowned raceways and rollers to ensure even load distribution.
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Popular 1966 GMC I1500 Differentials Categories
Most Popular Differential Oil for 1966 GMC I1500s
Enhance your 1966 GMC I1500 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)
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 I1500 Rear Housing Cover Gasket
Upgrade your I1500 with our best-selling Rear Housing Cover Gasket with a 4.5 Starts rating across 10 reviews.
Felpro – Felpro Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket, RDS 6629 (Part No.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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Top-Quality Differential Bearings for 1966 GMC I1500s
Choose a high-quality OEM or aftermarket Differential Bearing for GMC I1500s and enjoy top-notch performance from $20.29.
National – National Bearing Race, 25523 (Part No.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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Top Picks for 1966 GMC I1500 Front Differential Pinion Bearings
Invest in one of our 4 durable Front Differential Pinion Bearings for your 1966 GMC, knowing you’re getting trusted brands and expert craftsmanship.
National – National Tapered Roller Bearing Cone, 02872 (Part No.02872)
from
$24.99
National Oil Seals & Bearings offer a full line of premium oil seals and bearings.
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National – National Tapered Roller Bearing Cone, 31594 (Part No.31594)
from
$34.49
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-2872 (Part No.S-2872)
Driveworks – Driveworks Tapered Roller Bearing, S-31594 (Part No.S-31594)
Top-Rated Differential Pinion Seals for 1966 GMC I1500s
Make a smart move for your 1966 GMC I1500 with products all priced from $13.99 to $23.79.
National – National Differential Pinion Seal, 5778 (Part No.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.
See More
Driveworks – Driveworks Oil Seal, S-5778 (Part No.S-5778)
Top-Rated Differential Brands For Your 1966 GMC I1500
When it comes to finding the perfect Differential for your 1966 GMC I1500, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 4 trusted brands. We carry the most popular Differential brands including Felpro, National, and Driveworks, and more, all known for their exceptional customer ratings (average brand rating of 4.6 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 GMC I1500, providing peace of mind with parts that meet or exceed OEM standards.
Popular Felpro 1966 GMC I1500 Differentials
If you’re looking for a top-quality Differential for your 1966 GMC I1500, Advance Auto Parts has exactly what you need with our selection of Felpro Differentials. We have 1 Felpro Differentials in stock for this fitment, all known for their durability and precision fit. With prices starting at just $7.99, you’ll find the perfect Differential for your needs and budget. Felpro Differentials for the 1966 GMC I1500 come highly rated, with over 10 customer reviews and an impressive average rating of 4.6 stars. Choosing a Felpro Differential from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
from
$7.99
(10)
Felpro Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket, RDS 6629
“Fit perfect”
Top-Quality National 1966 GMC I1500 Differentials
For those in search of a high-quality Differential for their 1966 GMC I1500, Advance Auto Parts offers a great selection of National Differentials. With 1 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 $23.79, giving you a range of options to suit your budget. Backed by over 4 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.
from
$23.79
(4)
National Differential Pinion Seal, 5778
“Works well fit right in. Love national seals”
FAQs for 1966 GMC I1500 Differentials
What are the best-selling Differentials for 1966 GMC I1500s?
Out of 13 Differentials that fit 1966 GMC I1500s, the following parts are the top sellers:
- Yukon Gear 3 Qt – Penzoil 80W90 Conventional Gear Oil, 15002 (11644279) – $44.99
- National Differential Pinion Seal, 5778 (3270688) – $23.79
- National Tapered Roller Bearing Cone, 02872 (3271935) – $24.99
What’s the price range for 1966 GMC I1500 Differentials?
The prices of Differentials for the 1966 GMC I1500 range from $7.99 up to $44.99 for the most premium parts.
What is the average price of a Differential for a 1966 GMC I1500?
The average price for Differentials for the 1966 GMC I1500 is $23.06. 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 I1500?
The cheapest 1966 GMC I1500 Differentials we carry are:
- Felpro Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket, RDS 6629 (5185793) – $7.99
- National Bearing Race, 02820 (3271927) – $13.49
- National Taper Bearing Cup, 31520 (3273903) – $13.79
- Driveworks Oil Seal, S-5778 (5440041) – $13.99
- Driveworks Tapered Roller Bearing, S-2820 (11494018) – $18.49
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 PB15 Series Differentials.
What are the top-rated Differentials that fit the 1966 GMC I1500?
The one 1966 GMC I1500 Differential we have in stock is the Felpro Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket, RDS 6629. It is rated 4.5 stars and costs $7.99.
What types of Differentials do you sell for my 1966 GMC I1500?
As of 8/2/26, these are some of the most in-demand types of Differentials for a 1966 GMC I1500:
Can I get help with 1966 GMC I1500 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 I1500 Differentials?
Advance Auto Parts keeps returns simple. For new GMC I1500 Differentials and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.