1966 GMC 2500 Differentials
Keep Your 1966 GMC 2500 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 2500 looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Differential Bearings, Differential Bearing Kits, and Differential Oil. 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. For example, National Differentials start at just $9.99 with an average 4.3 star rating. With over 12 reviews and a solid 3.8 star average, you can shop with confidence knowing other GMC 2500 owners approve.
Competitive Prices and Extensive Inventory
The average price for a 1966 GMC 2500 Differential at Advance Auto Parts is around $77.73, with a range that starts at $9.49 and goes up to $229.99. With 8 options in stock from 5 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 6095-1, and National Multi-Purpose Bearing, KD-11786-Y start at just $9.49 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 2500 in peak condition, inside and out.
Essential 1966 GMC 2500 Differentials
USA Standard Gear – USA Standard Gear Differential Bearing Kit, 58042 (Part No.58042)
from
$229.99
This kit uses Koyo 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. USA Standard Gear 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.
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National – National Multi-Purpose Bearing, KD-11786-Y (Part No.KD-11786-Y)
from
$81.49
Manufactured with premium-grade steel, National taper bearing sets feature crowned raceways and rollers to ensure even load distribution.
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National – National Taper Bearing Cup, 15245 (Part No.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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USA Standard Gear – USA Standard Gear Differential Rebuild Kit, 60017 (Part No.60017)
National – National Bearing Race, 02420 (Part No.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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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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Felpro – Felpro Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket, RDS 6095-1 (Part No.RDS 6095-1)
from
$9.49
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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Victor Reinz – Victor Reinz Differential Cover Gasket, 71-14868-00 (Part No.71-14868-00)
from
$9.99
With Victor Reinz gaskets, you can be sure you are getting sealing solutions that deliver OE quality gasket technology and engineering. That is because Victor Reinz is an original equipment supplier and the trusted choice of manufacturers the world over, offering broad coverage for foreign and domestic cars and trucks. In Victor Reinz gasket sets, you get the right combination of components needed for fast, long-lasting repairs.
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Popular 1966 GMC 2500 Differentials Categories
Most Popular Differential Bearings for 1966 GMC 2500s
Enhance your 1966 GMC 2500 with one of the 2 Differential Bearings we have in stock, starting at just $9.99.
National – National Taper Bearing Cup, 15245 (Part No.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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National – National Multi-Purpose Bearing, KD-11786-Y (Part No.KD-11786-Y)
from
$81.49
Manufactured with premium-grade steel, National taper bearing sets feature crowned raceways and rollers to ensure even load distribution.
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Best-Selling 1966 GMC 2500 Differential Bearing Kit
Upgrade your 2500 with our best-selling Differential Bearing Kit.
USA Standard Gear – USA Standard Gear Differential Bearing Kit, 58042 (Part No.58042)
from
$229.99
This kit uses Koyo 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. USA Standard Gear 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.
See More
Top-Quality Differential Oil for 1966 GMC 2500s
Choose a high-quality OEM or aftermarket Differential Oil for GMC 2500s and enjoy top-notch performance from $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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Our Top Pick for a 1966 GMC 2500 Rear Differential Cover Gasket
Invest in a
durable Rear Differential Cover Gasket for your 1966 GMC, knowing you’re getting trusted brands and expert craftsmanship.
Victor Reinz – Victor Reinz Differential Cover Gasket, 71-14868-00 (Part No.71-14868-00)
from
$9.99
With Victor Reinz gaskets, you can be sure you are getting sealing solutions that deliver OE quality gasket technology and engineering. That is because Victor Reinz is an original equipment supplier and the trusted choice of manufacturers the world over, offering broad coverage for foreign and domestic cars and trucks. In Victor Reinz gasket sets, you get the right combination of components needed for fast, long-lasting repairs.
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Our Front Differential Pinion Bearings for 1966 GMC 2500s
Make a smart move for your 1966 GMC 2500 with our Front Differential Pinion Bearing for $9.89.
National – National Bearing Race, 02420 (Part No.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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Top-Rated Differential Brands For Your 1966 GMC 2500
When it comes to finding the perfect Differential for your 1966 GMC 2500, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 5 trusted brands. We carry the most popular Differential brands including National, and more, all known for their exceptional customer ratings (average brand rating of 4.3 stars) and competitive prices, as low as $9.99. Purchasing a Differential from us here at Advance Auto Parts is a smart move for both you and your 1966 GMC 2500, providing peace of mind with parts that meet or exceed OEM standards.
Popular National 1966 GMC 2500 Differentials
If you’re looking for a top-quality Differential for your 1966 GMC 2500, Advance Auto Parts has exactly what you need with our selection of National Differentials. We have 1 National Differentials in stock for this fitment, all known for their durability and precision fit. With prices starting at just $9.99, you’ll find the perfect Differential for your needs and budget. National Differentials for the 1966 GMC 2500 come highly rated, with over 8 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.
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.”
FAQs for 1966 GMC 2500 Differentials
What are the best-selling Differentials for 1966 GMC 2500s?
Out of 8 Differentials that fit 1966 GMC 2500s, the following parts are the top sellers:
- Yukon Gear 3 Qt – Penzoil 80W90 Conventional Gear Oil, 15002 (11644279) – $44.99
- Felpro Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket, RDS 6095-1 (5189276) – $9.49
- National Multi-Purpose Bearing, KD-11786-Y (3277216) – $81.49
What’s the price range for 1966 GMC 2500 Differentials?
The prices of Differentials for the 1966 GMC 2500 range from $9.49 up to $229.99 for the most premium parts.
What is the average price of a Differential for a 1966 GMC 2500?
The average price for Differentials for the 1966 GMC 2500 is $77.73. 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 2500?
The cheapest 1966 GMC 2500 Differentials we carry are:
- Felpro Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket, RDS 6095-1 (5189276) – $9.49
- National Bearing Race, 02420 (18440006) – $9.89
- National Taper Bearing Cup, 15245 (3272400) – $9.99
- Victor Reinz Differential Cover Gasket, 71-14868-00 (12547604) – $9.99
- Yukon Gear 3 Qt – Penzoil 80W90 Conventional Gear Oil, 15002 (11644279) – $44.99
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 2500?
As of 8/2/26, these are some of the most in-demand types of Differentials for a 1966 GMC 2500:
Can I get help with 1966 GMC 2500 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 2500 Differentials?
Advance Auto Parts keeps returns simple. For new GMC 2500 Differentials and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.