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 Bearing Kits, Differential Pinion Pilot Bearings, and Rear Differential 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. For example, National Differentials start at just $9.99 with an average 4.3 star rating. With over 13 reviews and a solid 4 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 $87.91, with a range that starts at $9.49 and goes up to $229.99. With 6 options in stock from 4 trusted brands, finding the right fit is easy. Popular picks like Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket, Differential Rebuild Kit, and Differential Bearing Kit 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
National – Bearings (Part No.15245)
from
$9.99
National Oil Seals & Bearings offer a full line of premium oil seals and bearings.
Product Features:
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Product Features:
- Premium bearing design matches OEM specifications
- Precision manufactured using premium-grade steel for outstanding durability and performance
- Crowned raceways and rollers to ensure even load distribution for maximum life
- Industry leading coverage
- Professional technicians know they can depend on National
National – Shaft Repair Sleeve (Part No.99199)
from
$41.99
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.
Product Features:
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Product Features:
- Designed to repair damaged, grooved or worn shafts
- Durable stainless steel construction for corrosion-free sealing surface that surpasses most original shaft specifications
- Ideal for a shaft where indications of seal wear, such as tracks or grooves have developed
- Ultra-thin construction (0.01/0.25mm wall thickness) allows original seal size to be used with minimal additional lip loading
- Easy to install with removable flange and installation tool
Felpro – Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket (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.
Product Features:
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Product Features:
- Meets or exceeds all original equipment specifications
- Application specific design to ensure a perfect fit
- Engineered for the sealing repair environment
- Validated for fit, form and function
- Unsurpassed quality you can trust
USA Standard Gear – Differential Rebuild Kit (Part No.60017)
from
$225.99
Product Features:
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- Fits Dana Spicer 60 rear
- Uses Koyo bearings and races
- Included are pinion bearings and races, pinion seal, pinion nut, crush sleeve, marking compound and brush.
Victor Reinz – Differential Cover Gasket (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.
Product Features:
See More
Product Features:
- Choosing Victor Reinz assures getting OE quality parts in gaskets sets that have the coverage, contents, packaging and electronic cataloging to best meet the needs of the aftermarket.
- Dana engineering-approved for fit, form and function
- Meets or exceeds OE specifications.
USA Standard Gear – Differential Bearing Kit (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.
Product Features:
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Product Features:
- Fits Dana Spicer 60 rear
- Uses Koyo bearings and races
- Included are carrier bearings and races, pinion bearings and races, pinion seal, pinion nut, crush sleeve, marking compound and brush.
Popular 1966 GMC 2500 Differentials Categories
Most Popular Differential Bearing Kit for 1966 GMC 2500s
Enhance your 1966 GMC 2500 with this popular Differential Bearing Kit we have in stock, for $229.99.
USA Standard Gear – Differential Bearing Kit (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.
Product Features:
See More
Product Features:
- Fits Dana Spicer 60 rear
- Uses Koyo bearings and races
- Included are carrier bearings and races, pinion bearings and races, pinion seal, pinion nut, crush sleeve, marking compound and brush.
Best-Selling 1966 GMC 2500 Differential Pinion Pilot Bearing
Upgrade your 2500 with our best-selling Differential Pinion Pilot Bearing with a 5 Starts rating across 1 review.
National – Shaft Repair Sleeve (Part No.99199)
from
$41.99
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.
Product Features:
See More
Product Features:
- Designed to repair damaged, grooved or worn shafts
- Durable stainless steel construction for corrosion-free sealing surface that surpasses most original shaft specifications
- Ideal for a shaft where indications of seal wear, such as tracks or grooves have developed
- Ultra-thin construction (0.01/0.25mm wall thickness) allows original seal size to be used with minimal additional lip loading
- Easy to install with removable flange and installation tool
Top-Quality Rear Differential Cover Gaskets for 1966 GMC 2500s
Choose a high-quality OEM or aftermarket Rear Differential Cover Gasket for GMC 2500s and enjoy top-notch performance from $9.99.
Victor Reinz – Differential Cover Gasket (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.
Product Features:
See More
Product Features:
- Choosing Victor Reinz assures getting OE quality parts in gaskets sets that have the coverage, contents, packaging and electronic cataloging to best meet the needs of the aftermarket.
- Dana engineering-approved for fit, form and function
- Meets or exceeds OE specifications.
Our Top Pick for a 1966 GMC 2500 Front Housing Cover Gasket
Invest in a
durable Front Housing Cover Gasket for your 1966 GMC, knowing you’re getting trusted brands and expert craftsmanship.
Felpro – Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket (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.
Product Features:
See More
Product Features:
- Meets or exceeds all original equipment specifications
- Application specific design to ensure a perfect fit
- Engineered for the sealing repair environment
- Validated for fit, form and function
- Unsurpassed quality you can trust
Our Top-Rated Front Differential Pinion Bearings for 1966 GMC 2500s
Make a smart move for your 1966 GMC 2500 with our Front Differential Pinion Bearing for $9.99.
National – Bearings (Part No.15245)
from
$9.99
National Oil Seals & Bearings offer a full line of premium oil seals and bearings.
Product Features:
See More
Product Features:
- Premium bearing design matches OEM specifications
- Precision manufactured using premium-grade steel for outstanding durability and performance
- Crowned raceways and rollers to ensure even load distribution for maximum life
- Industry leading coverage
- Professional technicians know they can depend on National
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 4 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 2 National Differentials in stock for this fitment, all known for their durability and precision fit. With prices starting at just $9.99 and an average cost of $25.99, you’ll find the perfect Differential for your needs and budget. National Differentials for the 1966 GMC 2500 come highly rated, with over 9 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
$41.99
(1)
Shaft Repair Sleeve
“Very delicate piece, but came shipped quite safely and not damaged. High quality.”
FAQs for 1966 GMC 2500 Differentials
What are the best-selling Differentials for 1966 GMC 2500s?
Out of 6 Differentials that fit 1966 GMC 2500s, the following parts are the top sellers:
- Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket (5189276) – $9.49
- Differential Rebuild Kit (11645350) – $225.99
- Differential Bearing Kit (11643912) – $229.99
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 $87.91. 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:
- Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket (5189276) – $9.49
- Bearings (3272400) – $9.99
- Differential Cover Gasket (12547604) – $9.99
- Shaft Repair Sleeve (3271773) – $41.99
- Differential Rebuild Kit (11645350) – $225.99
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 are the top-rated Differentials that fit the 1966 GMC 2500?
The one 1966 GMC 2500 Differential we have in stock is the Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket. It is rated 3 stars and costs $9.49.
What types of Differentials do you sell for my 1966 GMC 2500?
As of 6/2/26, 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.