1978 GMC K35 Differentials

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Keep Your 1978 GMC K35 in Top Shape with Quality Differentials

Whether you’re repairing or upgrading your Differential, using high-quality parts is key to keeping your 1978 GMC K35 looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Differential Bearings, Differential Oil, 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, Felpro, and Motive Gear. For example, National Differentials start at just $13.99 with an average 4.3 star rating. Felpro and Motive Gear offer similar pricing and quality, backed by strong customer feedback. With over 78 reviews and a solid 4.4 star average, you can shop with confidence knowing other GMC K35 owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1978 GMC K35 Differential at Advance Auto Parts is around $303.23, with a range that starts at $4.99 and goes up to $1,487.99. With 279 options in stock from 16 trusted brands, finding the right fit is easy. Popular picks like Yukon Gear 3 Qt – Penzoil 80W90 Conventional Gear Oil, 15002, Yukon Gear Differential Cover B, 33572, and Yukon Gear Dana 60, Dana 70 & Dana 80 Cover Bolt, 33235 start at just $5.99 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 4WD Components and Universal Joints. At Advance Auto Parts, we’re here to help you keep your 1978 GMC K35 in peak condition, inside and out.

Essential 1978 GMC K35 Differentials

Driveworks – Driveworks Tapered Roller Bearing, S-A-46 (Part No.S-A-46)

Driveworks Tapered Roller Bearing, S-A-46

from

$19.99
Driveworks Tapered Roller Bearing, S-A-46.
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Yukon Gear – Yukon Gear Zip Locker Switch, 34015 (Part No.34015)

Yukon Gear Zip Locker Switch, 34015

from

$16.99
The Yukon Zip Locker is the latest in on-demand traction. Its air-operated design allows you to switch from an open differential to 100% lockup when you need it, giving you the ultimate in driver select ability.
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Yukon Gear – Yukon Gear Side Gear Thrust Washer for Dana 60, 70 & 80, 33532 (Part No.33532)

Yukon Gear Side Gear Thrust Washer for Dana 60, 70 & 80, 33532

from

$4.99
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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Yukon Gear – "Yukon Gear Pinion Depth Shims for 10.5"" GM 14 Bolt Truck, 55058" (Part No.55058)

"Yukon Gear Pinion Depth Shims for 10.5"" GM 14 Bolt Truck, 55058"

from

$37.99
Yukon shim kits are precision machined and tailored for each individual application to ensure you have the right shims for every set up.
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Yukon Gear – Yukon Gear Replacement Yoke for Dana 44-Hd, 60, and 70 with A 1310 U/Joint Size, 41023 (Part No.41023)

Yukon Gear Replacement Yoke for Dana 44-Hd, 60, and 70 with A 1310 U/Joint Size, 41023

from

$203.99
Yukon Gear and Axle manufactures a complete line of general replacement and performance series of pinion yokes for many street, racing, and heavy-duty off-road applications.
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Yukon Gear – Yukon Gear Seal Housing for Dana 60, Zip Locker, with O-Rings, 34039 (Part No.34039)

Yukon Gear Seal Housing for Dana 60, Zip Locker, with O-Rings, 34039

from

$79.99
The Yukon Zip Locker is the latest in on-demand traction. Its air-operated design allows you to switch from an open differential to 100% lockup when you need it, giving you the ultimate in driver select ability.
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Felpro – Felpro Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket, RDS 6095-1 (Part No.RDS 6095-1)

Felpro Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket, 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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Pro-King – Pro-King Differential Internal Nest Kit, 744A717 (Part No.744A717)

Pro-King Differential Internal Nest Kit, 744A717

from

$323.99
Pro-King is the leading supplier of transmission and driveline products in the aftermarket.
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USA Standard Gear – USA Standard Gear Differential Open Unit/Component, 17003 (Part No.17003)

USA Standard Gear Differential Open Unit/Component, 17003

from

$829.99
The Spartan Locker, by USA Standard Gear, provides reliable traction at a low cost. Give your vehicle great traction and save some cash. Choose a Spartan Locker for better traction. The Spartan locker by USA standard gear is a mechanical locker that replaces the spiders in a standard case. The Spartan locker’s design does not use the thrust washers and has a revolutionary spring and pin design that makes installation a snap! The couplers and drivers are made from 9310 steel, for added strength. Each Spartan locker carries a Limited warranty against defect.
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USA Standard Gear – USA Standard Gear Differential Rebuild Kit, 60016 (Part No.60016)

USA Standard Gear Differential Rebuild Kit, 60016

from

$275.99
USA Standard Master Overhaul kits let you finish your install with confidence. This kit uses Koyo bearings and races. Included are carrier bearings and races, pinion bearings and races, pinion seal, complete shim kit, ring gear bolts, pinion nut, crush sleeve (if applicable), oil baffles and slingers (if applicable), threading locking compound, marking compound with brush and gasket.
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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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National – National Shaft Repair Sleeve, 99138 (Part No.99138)

National Shaft Repair Sleeve, 99138

from

$30.99
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.
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Felpro – Felpro Axle Housing Cover Gasket: Irregular Shaped 14 Bolt Hole Gasket, RDS 55063 (Part No.RDS 55063)

Felpro Axle Housing Cover Gasket: Irregular Shaped 14 Bolt Hole Gasket, RDS 55063

from

$8.29
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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Yukon Gear – Yukon Gear Replacement Carrier Shim Kit for Dana 70 & 70HD, 55019 (Part No.55019)

Yukon Gear Replacement Carrier Shim Kit for Dana 70 & 70HD, 55019

from

$126.99
Yukon shim kits are precision machined and tailored for each individual application to ensure you have the right shims for every set up.
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Yukon Gear – Yukon Gear Differential, 26040 (Part No.26040)

Yukon Gear Differential, 26040

from

$939.99
Yukon Gear Differential, 26040. EXTERNAL SUPPLY>FDO>BACK ROOM-FDO>APPLICATION SPECIFIC from Yukon Gear
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Yukon Gear – "Yukon Gear Eaton-Type Positraction Carbon Clutch Kit with 14 Plates for GM 14T and 10.5"", 16112" (Part No.16112)

"Yukon Gear Eaton-Type Positraction Carbon Clutch Kit with 14 Plates for GM 14T and 10.5"", 16112"

from

$304.99
Yukon Gear & Axle clutch kits fit popular GM diffs outfitted with a Yukon Dura Grip positraction unit feature 14 advanced carbon clutch plates, ensuring total traction and long-lasting performance.
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Motive Gear – Motive Gear Differential Crush Sleeve, 3977355 (Part No.3977355)

Motive Gear Differential Crush Sleeve, 3977355

from

$11.99
Motive Gear Differential Crush Sleeve, 3977355.
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Powertrax – Powertrax Differential Lock Assembly, 9207053000 (Part No.9207053000)

Powertrax Differential Lock Assembly, 9207053000

from

$591.99
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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Yukon Gear – "Yukon Gear Eaton Positraction Shim Kit for 10.5"" GM 14 Bolt Truck, 16113" (Part No.16113)

"Yukon Gear Eaton Positraction Shim Kit for 10.5"" GM 14 Bolt Truck, 16113"

from

$78.99
This Yukon Gear & Axle shim kit is designed for GM 14T differentials outfitted with an Eaton positraction unit.
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Yukon Gear – "Yukon Gear Pilot Bearing for 10.5"" 14 Bolt Truck, 2.050"" O.D., 18041" (Part No.18041)

"Yukon Gear Pilot Bearing for 10.5"" 14 Bolt Truck, 2.050"" O.D., 18041"

from

$57.99
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 Ring and Pinion, GM10.5-410 (Part No.GM10.5-410)

Motive Gear Differential Ring and Pinion, GM10.5-410

from

$369.99
Motive Gear Differential Ring and Pinion, GM10.5-410.
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Yukon Gear – Yukon Gear Replacement Standard Open Spider Gear Kit, Dana 70/80, 35 Spline, 16093 (Part No.16093)

Yukon Gear Replacement Standard Open Spider Gear Kit, Dana 70/80, 35 Spline, 16093

from

$247.99
Yukon Gear & Axle spider gear kits feature higher quality materials and better manufacturing techniques than OEM to ensure a longer lasting spider gear set. Kit delivers everything needed for a complete and proper spider gear set replacement.
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Victor Reinz – Victor Reinz Differential Cover Gasket, 71-14868-00 (Part No.71-14868-00)

Victor Reinz Differential Cover Gasket, 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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Yukon Gear – "Yukon Gear 10.5"" GM 14 Bolt Truck Ring Gear Bolt, 33050" (Part No.33050)

"Yukon Gear 10.5"" GM 14 Bolt Truck Ring Gear Bolt, 33050"

from

$11.99
“10.5”” GM 14 bolt truck ring gear bolt 4.56 & up. 9/16″” x 18. 2.522″” overall length.”
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Yukon Gear – Yukon Gear Carrier Installation Kit for Dana 60 Differential, 57005 (Part No.57005)

Yukon Gear Carrier Installation Kit for Dana 60 Differential, 57005

from

$194.99
Yukon Carrier Installation Kits are a convenient and low-cost solution for carrier changes in cases where one is upgrading to a positraction limited slip differential, a mechanical locker, or an air operated locker. These kits contain carrier bearings and races and a carrier shim kit.
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Motive Gear – Motive Gear Differential Gear Install Kit, GM10.5IK-2 (Part No.GM10.5IK-2)

Motive Gear Differential Gear Install Kit, GM10.5IK-2

from

$44.49
All Motive Gear products are engineered for their specific application and manufactured in state of the art facilities. All of our products undergo rigid quality control processes to insure proper fit, performance and longevity. Motive Gear products can be found in the winners circle at NHRA, IHRA, NMRA, NMCA, SODA, SCORE, BITD, Ultra-4 and NASCAR events because we offer unmatched selection and quality demanded by racers and their crew chiefs – the same quality and selection demanded by DIY customers and top mechanics. With four warehouses strategically located across North America, most Motive Gear orders arrive within 2-4 days. Win with Motive Gear!
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Dorman – Dorman Premium Ring and Pinion Master Bearing and Installation Kit, 797-106 (Part No.797-106)

Dorman Premium Ring and Pinion Master Bearing and Installation Kit, 797-106

from

$354.99
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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Yukon Gear – Yukon Gear Differential, 26039 (Part No.26039)

Yukon Gear Differential, 26039

from

$869.99
Yukon Gear Differential, 26039. EXTERNAL SUPPLY>FDO>BACK ROOM-FDO>APPLICATION SPECIFIC from Yukon Gear
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Most Popular Differential Bearings for 1978 GMC K35s

Enhance your 1978 GMC K35 with one of the 5 Differential Bearings we have in stock, starting at just $13.49.

National – National Bearing Race, 382A (Part No.382A)

National Bearing Race, 382A

from

$13.99
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, 382S (Part No.382S)

National Bearing Race, 382S

from

$23.29
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-A-46 (Part No.S-A-46)

Driveworks Tapered Roller Bearing, S-A-46

from

$19.99
Driveworks Tapered Roller Bearing, S-A-46.
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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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Driveworks – Driveworks Spindle Bearing and Seal Kit, S-SBK-3 (Part No.S-SBK-3)

Driveworks Spindle Bearing and Seal Kit, S-SBK-3

from

$18.49
Driveworks Spindle Bearing and Seal Kit, S-SBK-3.
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Best-Selling 1978 GMC K35 Differential Oil

Upgrade your K35 with one of our 3 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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Valvoline – Valvoline Multi-Vehicle (ATF) Full Synthetic Automatic Transmission Fluid 1 GA, 904891 (Part No.904891)

Valvoline Multi-Vehicle (ATF) Full Synthetic Automatic Transmission Fluid 1 GA, 904891

from

$35.99
Choosing an automatic transmission fluid just got easier. Valvoline Full Synthetic MaxLife Multi-Vehicle ATF, the #1 ATF product, is suitable for use in 95% of ATF vehicles in operation with US registered light duty applications. And now, it€™s also recommended for most belt and chain-driven continuously variable transmissions (CVT). Featuring advanced additives to prevent the major causes of transmission breakdown, it€™s designed to help prevent leaks, reduce wear and tear, and maximize performance €“ all for much longer than conventional fluids. It has improved thermal stability for longer fluid life, better viscosity stability for consistent transmission operation, and frictional enhancements for smooth gear engagements. Whether your vehicle has a CVT or traditional automatic, Valvoline MaxLife Multi-Vehicle ATF is suitable for a broad range of transmissions including Ford, GM, Toyota, Honda, Nissan, Hyundai, Subaru, BMW, Mercedes, Volvo, VW and Audi vehicles. It€™s specifically recommended for use in the following applications: GM DEXRON-II, DEXRON-III, DEXRON-VI, and DEX-CVT; Ford MERCON LV; Toyota/Lexus Type T, T-II, T-IV, WS, CVTF FE, and CVTF TC. For the many miles ahead, trust your transmission with Valvoline, the #1 automatic transmission fluid brand.
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Top-Quality Rear Differential Cover Gaskets for 1978 GMC K35s

Choose a high-quality OEM or aftermarket Rear Differential Cover Gasket for GMC K35s and enjoy top-notch performance from $9.99.

Yukon Gear – Yukon Gear GM 10.5′ 14 Bolt Truck Cover Gasket, 23016 (Part No.23016)

Yukon Gear GM 10.5' 14 Bolt Truck Cover Gasket, 23016

from

$13.99
14T cover gasket. EXTERNAL SUPPLY>FDO>BACK ROOM-FDO>APPLICATION SPECIFIC from Yukon Gear
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Victor Reinz – Victor Reinz Differential Cover Gasket, 71-14868-00 (Part No.71-14868-00)

Victor Reinz Differential Cover Gasket, 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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Top Picks for 1978 GMC K35 Differential Covers

Invest in one of our 7 durable Differential Covers for your 1978 GMC, knowing you’re getting trusted brands and expert craftsmanship.

Yukon Gear – Yukon Gear Steel Cover for Dana 70, 32322 (Part No.32322)

Yukon Gear Steel Cover for Dana 70, 32322

from

$149.99
These Yukon replacement diff covers are a direct bolt-on.
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Yukon Gear – "Yukon Gear Steel Cover for GM 10.5"" 14 Bolt Truck, 32345" (Part No.32345)

"Yukon Gear Steel Cover for GM 10.5"" 14 Bolt Truck, 32345"

from

$92.99
These Yukon replacement diff covers are a direct bolt-on.
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Yukon Gear – "Yukon Gear Chrome Cover for 10.5"" GM 14 Bolt Truck, 32013" (Part No.32013)

"Yukon Gear Chrome Cover for 10.5"" GM 14 Bolt Truck, 32013"

from

$59.99
These Yukon replacement diff covers take your rig a step beyond the boring factory look. They are the stock OE design finished in chrome.
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Yukon Gear – Yukon Gear Steel Cover for Dana 60 Standard Rotation, 32321 (Part No.32321)

Yukon Gear Steel Cover for Dana 60 Standard Rotation, 32321

from

$114.99
These Yukon replacement diff covers are a direct bolt-on.
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B & M – "B & M Cast Aluminum Differential Cover For Gm 9.5"" 14 Bolt, 70505" (Part No.70505)

"B & M Cast Aluminum Differential Cover For Gm 9.5"" 14 Bolt, 70505"

from

$399.99
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 the gears and bearings. Additional features include a magnetic drain plug for catching ferrous metal particles, 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. Note: Gasket not included.
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B & M – "B & M Cast Aluminum Differential Cover For Gm 10.5"" 14 Bolt, 70501" (Part No.70501)

"B & M Cast Aluminum Differential Cover For Gm 10.5"" 14 Bolt, 70501"

from

$385.99
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 the gears and bearings. Additional features include a magnetic drain plug for catching ferrous metal particles, 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. Note: Does Not Include Gasket
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Yukon Gear – Yukon Gear Standard Rotation Dana 60 Chrome Differential Cover, 32005 (Part No.32005)

Yukon Gear Standard Rotation Dana 60 Chrome Differential Cover, 32005

from

$89.99
Chrome replacement cover for Dana 60 and 61(not reverse rotation!).
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Our Top-Rated Rear Housing Cover Gaskets for 1978 GMC K35s

Make a smart move for your 1978 GMC K35 with our Rear Housing Cover Gasket for $8.29.

Felpro – Felpro Axle Housing Cover Gasket: Irregular Shaped 14 Bolt Hole Gasket, RDS 55063 (Part No.RDS 55063)

Felpro Axle Housing Cover Gasket: Irregular Shaped 14 Bolt Hole Gasket, RDS 55063

from

$8.29
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-Rated Differential Brands For Your 1978 GMC K35

When it comes to finding the perfect Differential for your 1978 GMC K35, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 16 trusted brands. We carry the most popular Differential brands including Felpro, National, and Motive Gear, and more, all known for their exceptional customer ratings (average brand rating of 4.6 stars) and competitive prices, as low as $8.29. Purchasing a Differential from us here at Advance Auto Parts is a smart move for both you and your 1978 GMC K35, providing peace of mind with parts that meet or exceed OEM standards.

Popular Felpro 1978 GMC K35 Differentials

If you’re looking for a top-quality Differential for your 1978 GMC K35, Advance Auto Parts has exactly what you need with our selection of Felpro Differentials. We have 2 Felpro Differentials in stock for this fitment, all known for their durability and precision fit. With prices starting at just $8.29 and an average cost of $13.14, you’ll find the perfect Differential for your needs and budget. Felpro Differentials for the 1978 GMC K35 come highly rated, with over 14 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.
Felpro Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket, RDS 6014
from $17.99
(1)
Felpro Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket, RDS 6014
“OEM only uses silicone , the gasket set with a thin layer of silicone is a much better sealant method”

Top-Quality National 1978 GMC K35 Differentials

For those in search of a high-quality Differential for their 1978 GMC K35, Advance Auto Parts offers a great selection of National Differentials. With 2 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 $13.99, with an average price of $22.49, giving you a range of options to suit your budget. Backed by over 7 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 Bearing Race, 382A
from $13.99
(6)
National Bearing Race, 382A
“Fit perfectly. No difficulty replacing my old ones.”
National Shaft Repair Sleeve, 99138
from $30.99
(1)
National Shaft Repair Sleeve, 99138
“Perfect Fit. Product was exactly as described”

FAQs for 1978 GMC K35 Differentials

What are the best-selling Differentials for 1978 GMC K35s?

Out of 279 Differentials that fit 1978 GMC K35s, the following parts are the top sellers:

What’s the price range for 1978 GMC K35 Differentials?

The prices of Differentials for the 1978 GMC K35 range from $4.99 up to $1,487.99 for the most premium parts.

What is the average price of a Differential for a 1978 GMC K35?

The average price for Differentials for the 1978 GMC K35 is $303.23. 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 any other 1978 GMC models?

Yes. We stock Differentials for 12 other popular 1978 GMC models. Some of the most popular are 1978 Jimmy Differentials, 1978 Caballero Differentials, 1978 K25 Differentials, 1978 K15 Differentials, and 1978 G25 Differentials.

What types of Differentials do you sell for my 1978 GMC K35?

As of 8/2/26, these are some of the most in-demand types of Differentials for a 1978 GMC K35:

Can I get help with 1978 GMC K35 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 K35 Differentials?

Advance Auto Parts keeps returns simple. For new GMC K35 Differentials and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.