1977 Chevrolet K20 Differentials

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Keep Your 1977 Chevrolet K20 in Top Shape with Quality Differentials

Whether you’re repairing or upgrading your Differential, using high-quality parts is key to keeping your 1977 Chevrolet K20 looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Rear Differential Cover Gaskets, Differential Bearings, 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, Motive Gear, and Richmond Gear. For example, National Differentials start at just $11.99 with an average 4.3 star rating. Motive Gear and Richmond Gear offer similar pricing and quality, backed by strong customer feedback. With over 1,595 reviews and a solid 4.4 star average, you can shop with confidence knowing other Chevrolet K20 owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1977 Chevrolet K20 Differential at Advance Auto Parts is around $217.81, with a range that starts at $0.91 and goes up to $1,302.99. With 387 options in stock from 16 trusted brands, finding the right fit is easy. Popular picks like Dorman – Help Differential Shaft Lock Bolt, 81048, Motive Gear Ring Gear Bolt, 14066913, and Yukon Gear 3 Qt – Penzoil 80W90 Conventional Gear Oil, 15002 start at just $2.99 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 1977 Chevrolet K20 in peak condition, inside and out.

Essential 1977 Chevrolet K20 Differentials

Mr. Gasket – Mr. Gasket Differential Cover Gasket, 84B (Part No.84B)

Mr. Gasket Differential Cover Gasket, 84B

from

$22.19
Mr. Gasket Axle Housing/Differential Cover or Rear End Gaskets are manufactured from a .047 inch thick cellulose/nitrile composite gasket material for excellent sealing and durability. They are precision die-cut for an excellent fit. Fits 1964-1970 Chevrolet 8.2 inch 10 bolt & 1970-1981 GM 8.5 inch ring gear.
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Yukon Gear – Yukon Gear Bearing Race Driver for Dana 25, 27, 30, 44, 50, and 53 Differentials, 56003 (Part No.56003)

Yukon Gear Bearing Race Driver for Dana 25, 27, 30, 44, 50, and 53 Differentials, 56003

from

$215.99
Yukon Gear & Axle offers a full line of top quality differential tools to save time and money.
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Yukon Gear – "Yukon Gear Replacement Front Axle Inner Seal Redi-Sleeve For Dana 44 & 8.5"" GM, 30219" (Part No.30219)

"Yukon Gear Replacement Front Axle Inner Seal Redi-Sleeve For Dana 44 & 8.5"" GM, 30219"

from

$83.99
“Replacement front axle inner seal redi-sleeve for Dana 44 & 8.5″” GM.Yukon Mighty seal.”
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Yukon Gear – Yukon Gear Pinion Setup Bearing for Popular GM, Ford, Dana, & Chrysler Differentials, 56045 (Part No.56045)

Yukon Gear Pinion Setup Bearing for Popular GM, Ford, Dana, & Chrysler Differentials, 56045

from

$153.99
Yukon Gear & Axle offers a full line of top quality differential tools to save time and money.
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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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Richmond Gear – Richmond Gear Differential Mini Spool, 78-1028-1 (Part No.78-1028-1)

Richmond Gear Differential Mini Spool, 78-1028-1

from

$124.99
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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Schaeffler – Schaeffler Shaft Seal, SS2776 (Part No.SS2776)

Schaeffler Shaft Seal, SS2776

from

$13.99
Our wheel seals are engineered using only the highest-quality materials to meet vehicle manufacturer specificatons. We work with suppliers to design seals that meet FAG’s quality standards. Seals are designed to protect wheel end components from contamination – such as dirt, dust, and moisture – and prevent the loss of grease over the life of the bearing. The specifications for wheel seals are very demanding, and the type required depends on the specific application, position and vehicle class.
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Yukon Gear – "Yukon Gear Chrome Cover for 8.5"" GM Front, 32016" (Part No.32016)

"Yukon Gear Chrome Cover for 8.5"" GM Front, 32016"

from

$44.99
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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Dorman – Help – Dorman – Help Pinion Crush Sleeves, 81057 (Part No.81057)

Dorman - Help Pinion Crush Sleeves, 81057

from

$5.99
This differential crush sleeve is designed to match the fit and function of the original sleeve on specified vehicles, and is engineered for durability and reliable performance.
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Motive Gear – Motive Gear Differential Master Bearing Kit – Timken, R12RMKT (Part No.R12RMKT)

Motive Gear Differential Master Bearing Kit - Timken, R12RMKT

from

$119.99
Motive Gear Differential Bearing Kits Include Front & Rear Pinion Bearing, Pinion Seal, Carrier Bearings, Pilot Bearing Where Applicable, Gear Marking Compound, Crush Sleeve, Pinion Nut, Brush, Thread Locking Compound And Cover Gasket Or Rtv
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Yukon Gear – Yukon Gear Master Overhaul Kit, Dana 44 Standard Rotation Front Diff, 30 Spline, 14021 (Part No.14021)

Yukon Gear Master Overhaul Kit, Dana 44 Standard Rotation Front Diff, 30 Spline, 14021

from

$369.99
Yukon Master Overhaul Kits give you all the high-quality parts you need to start and finish every differential job. Yukon offers more tailor-made kits than any other manufacturer in the industry to meet your specific installation needs. This kit uses Timken bearings and races along with high quality seals and small parts. Yukon Master Overhaul Kits are the most comprehensive and complete kits on the market because Yukon does extensive research to ensure that every kit has everything you need for your application.
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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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Yukon Gear – Yukon Gear Replacement Carrier Shim Kit For Dana Spicer 44, 30 Spline Axles, 55010 (Part No.55010)

Yukon Gear Replacement Carrier Shim Kit For Dana Spicer 44, 30 Spline Axles, 55010

from

$15.99
Yukon 1541H alloy replacement rear axle for Dana 80, 37 spline (34.0-36.5) Full float axle (8X3.96). Yukon 1541H alloy axles offer a strength increase over stock while retaining a low cost. Yukon 1541H alloy rear axles come with a one year warranty against manufacturing defects. This is a full-floating axle.
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Yukon Gear – Yukon Gear Dana 44 Carrier Installation Kit Replacement, 57003 (Part No.57003)

Yukon Gear Dana 44 Carrier Installation Kit Replacement, 57003

from

$128.99
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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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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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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Yukon Gear – "Yukon Gear Standard Open Spider Gear Kit, 33 Spline GM 9.25"" IFS and GM 9.5"" Axles, 16060" (Part No.16060)

"Yukon Gear Standard Open Spider Gear Kit, 33 Spline GM 9.25"" IFS and GM 9.5"" Axles, 16060"

from

$317.99
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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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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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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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 Mini Spool for GM 10.5"" 14 Bolt Truck, 32301" (Part No.32301)

"Yukon Gear Mini Spool for GM 10.5"" 14 Bolt Truck, 32301"

from

$287.99
Yukon Mini Spools are a low-cost traction option for vehicles looking for full-time lockup. The mini spool installs into a standard open carrier in place of the spider gears and delivers 100% power to both tires at all times. These units are not recommended for street-driven vehicles. Full spools are recommended for vehicles with large tires or high horsepower.
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Yukon Gear – "Yukon Gear Standard Open Side Gear Thrust Washer for 8.5"" GM, 33304" (Part No.33304)

"Yukon Gear Standard Open Side Gear Thrust Washer for 8.5"" GM, 33304"

from

$15.99
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 Seal Housing for Dana 44, Zip Locker, with O-Rings, 34013 (Part No.34013)

Yukon Gear Seal Housing for Dana 44, Zip Locker, with O-Rings, 34013

from

$83.99
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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Motive Gear – Motive Gear Differential Ring and Pinion, GM9.5-342 (Part No.GM9.5-342)

Motive Gear Differential Ring and Pinion, GM9.5-342

from

$261.99
Motive Gear Differential Ring and Pinion, GM9.5-342.
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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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Yukon Gear – "Yukon Gear Standard Open and Gov-Loc Cross Pin for 9.5"" GM, 33402" (Part No.33402)

"Yukon Gear Standard Open and Gov-Loc Cross Pin for 9.5"" GM, 33402"

from

$32.99
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 Dura Grip Spider Gear Set for Dana 44 Differential with 30 Spline Axles, 16168 (Part No.16168)

Yukon Gear Dura Grip Spider Gear Set for Dana 44 Differential with 30 Spline Axles, 16168

from

$399.99
Yukon Gear & Axle spider gear kits utilize the highest quality materials and best production techniques in the industry 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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Yukon Gear – "Yukon Gear Dana 30 & Dana 44 Power Lok Bolt, Left Hand, & 8.75"" Chrysler & 55P, 33234" (Part No.33234)

"Yukon Gear Dana 30 & Dana 44 Power Lok Bolt, Left Hand, & 8.75"" Chrysler & 55P, 33234"

from

$26.99
“Dana 30 & Dana 44 Power Lok bolt, left hand, & 8.75″” Chrysler & 55P.”
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Popular 1977 Chevrolet K20 Differentials Categories

Most Popular Rear Differential Cover Gaskets for 1977 Chevrolet K20s

Enhance your 1977 Chevrolet K20 with one of the 3 Rear Differential Cover Gaskets we have in stock, starting at just $11.99.

Mr. Gasket – Mr. Gasket Differential Cover Gasket, 84B (Part No.84B)

Mr. Gasket Differential Cover Gasket, 84B

from

$22.19
Mr. Gasket Axle Housing/Differential Cover or Rear End Gaskets are manufactured from a .047 inch thick cellulose/nitrile composite gasket material for excellent sealing and durability. They are precision die-cut for an excellent fit. Fits 1964-1970 Chevrolet 8.2 inch 10 bolt & 1970-1981 GM 8.5 inch ring gear.
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Felpro – Felpro Axle Housing Cover Gasket Oval Shaped 10 Bolt Hole Gasket, RDS 55028-1 (Part No.RDS 55028-1)

Felpro Axle Housing Cover Gasket Oval Shaped 10 Bolt Hole Gasket, RDS 55028-1

from

$11.99
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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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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Best-Selling 1977 Chevrolet K20 Differential Bearings

Upgrade your K20 with one of our 7 best-selling Differential Bearings, earning an average 4.75 stars rating across 9 reviews.

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 Tapered Roller Bearing Cone, LM104949 (Part No.LM104949)

National Tapered Roller Bearing Cone, LM104949

from

$24.29
Manufactured with premium-grade steel, National taper bearing cones feature crowned raceways and rollers 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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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 Wheel Bearing Kit, S-RA-321 (Part No.S-RA-321)

Driveworks Wheel Bearing Kit, S-RA-321

from

$141.99
Driveworks Wheel Bearing Kit, S-RA-321.
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Schaeffler – Schaeffler Bearing – TRB (Tapered Roller Bearing), KT45 (Part No.KT45)

Schaeffler Bearing - TRB (Tapered Roller Bearing), KT45

from

$21.99
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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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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Top-Quality Rear Housing Cover Gaskets for 1977 Chevrolet K20s

Choose a high-quality OEM or aftermarket Rear Housing Cover Gasket for Chevrolet K20s and enjoy top-notch performance from $7.99.

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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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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Top Picks for 1977 Chevrolet K20 Differential Oil

Invest in one of our 3 durable Differential Oil for your 1977 Chevrolet, knowing you’re getting trusted brands and expert craftsmanship.

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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Differential Covers for 1977 Chevrolet K20s

Make a smart move for your 1977 Chevrolet K20 with products all priced from $44.99 to $385.99.

Yukon Gear – Yukon Gear Replacement Chrome Cover for Dana 44, 32004 (Part No.32004)

Yukon Gear Replacement Chrome Cover for Dana 44, 32004

from

$67.99
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 Chrome Cover for 8.5"" GM Front, 32016" (Part No.32016)

"Yukon Gear Chrome Cover for 8.5"" GM Front, 32016"

from

$44.99
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 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 44 Standard Rotation, 32319 (Part No.32319)

Yukon Gear Steel Cover for Dana 44 Standard Rotation, 32319

from

$129.99
These Yukon replacement diff covers are a direct bolt-on.
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B & M – "B & M Cast Aluminum Differential Cover For Gm 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 Aluminum Girdle replacement Cover for Dana 44 TA HD, 32110 (Part No.32110)

Yukon Gear Aluminum Girdle replacement Cover for Dana 44 TA HD, 32110

from

$359.99
These Yukon replacement diff covers take your rig a step beyond the boring factory look. They are the stock OE design made from aluminum and polished to perfection.
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B & M – "B & M Cast Aluminum Differential Cover For Gm 8.875"" 12 Bolt Truck, 70504" (Part No.70504)

"B & M Cast Aluminum Differential Cover For Gm 8.875"" 12 Bolt Truck, 70504"

from

$334.99
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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Yukon Gear – "Yukon Gear Polished Aluminum Cover for 8.5"" GM, 32029" (Part No.32029)

"Yukon Gear Polished Aluminum Cover for 8.5"" GM, 32029"

from

$296.99
These Yukon replacement diff covers take your rig a step beyond the boring factory look. They are the stock OE design made from aluminum and polished to perfection.
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Top-Rated Differential Brands For Your 1977 Chevrolet K20

When it comes to finding the perfect Differential for your 1977 Chevrolet K20, 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 Richmond Gear, National, and Motive Gear, and more, all known for their exceptional customer ratings (average brand rating of 4.4 stars) and competitive prices, as low as $6.99. Purchasing a Differential from us here at Advance Auto Parts is a smart move for both you and your 1977 Chevrolet K20, providing peace of mind with parts that meet or exceed OEM standards.

Popular Richmond Gear 1977 Chevrolet K20 Differentials

If you’re looking for a top-quality Differential for your 1977 Chevrolet K20, Advance Auto Parts has exactly what you need with our selection of Richmond Gear Differentials. We have 3 Richmond Gear Differentials in stock for this fitment, all known for their durability and precision fit. With prices starting at just $342.99 and an average cost of $351.66, you’ll find the perfect Differential for your needs and budget. Richmond Gear Differentials for the 1977 Chevrolet K20 come highly rated, with over 26 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, 69-0298-1
from $360.99
(1)
Richmond Gear Differential Ring And Pinion, 69-0298-1
“Best ever!!!’nn”
Richmond Gear Differential Ring And Pinion, 49-0034-1
from $342.99
(23)
Richmond Gear Differential Ring And Pinion, 49-0034-1
“So far so good.”
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”

Top-Quality National 1977 Chevrolet K20 Differentials

For those in search of a high-quality Differential for their 1977 Chevrolet K20, 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 $11.99, with an average price of $18.99, giving you a range of options to suit your budget. Backed by over 9 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, LM501314
from $11.99
(2)
National Bearing Race, LM501314
“good quality & price”
National Shaft Repair Sleeve, 99138
from $30.99
(1)
National Shaft Repair Sleeve, 99138
“Perfect Fit. Product was exactly as described”
National Bearing Race, 382A
from $13.99
(6)
National Bearing Race, 382A
“Fit perfectly. No difficulty replacing my old ones.”

FAQs for 1977 Chevrolet K20 Differentials

What are the best-selling Differentials for 1977 Chevrolet K20s?

Out of 387 Differentials that fit 1977 Chevrolet K20s, the following parts are the top sellers:

What’s the price range for 1977 Chevrolet K20 Differentials?

The prices of Differentials for the 1977 Chevrolet K20 range from $0.91 up to $1,302.99 for the most premium parts.

What is the average price of a Differential for a 1977 Chevrolet K20?

The average price for Differentials for the 1977 Chevrolet K20 is $217.81. 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 other Chevrolet K20 model years?

Yes, we carry Differentials for 10 model years of Chevrolet K20s between 1975 and 1986. The following model years are the most popular for Differential purchases: 1986, 1985, 1984, 1983, 1982, 1981, 1980, 1979, and 1978.

What are the cheapest Differentials for my 1977 Chevrolet K20?

The cheapest 1977 Chevrolet K20 Differentials we carry are:

Does Advance Auto Parts sell Differentials for any other 1977 Chevrolet models?

Yes. We stock Differentials for 24 other popular 1977 Chevrolet models. Some of the most popular are 1977 Impala Differentials, 1977 Malibu Differentials, 1977 Camaro Differentials, 1977 Monte Carlo Differentials, and 1977 Corvette Differentials.

What types of Differentials do you sell for my 1977 Chevrolet K20?

As of 8/2/26, these are some of the most in-demand types of Differentials for a 1977 Chevrolet K20:

Can I get help with 1977 Chevrolet K20 Differential orders?

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

What is your return policy for Chevrolet K20 Differentials?

Advance Auto Parts keeps returns simple. For new Chevrolet K20 Differentials and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.