1978 Chevrolet K20 Differentials

Essential 1978 Chevrolet K20 Differentials

Felpro – DIFFERENTIAL GASKET (Part No.RDS 55075)

DIFFERENTIAL GASKET

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$8.29
Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design to ensure a perfect fit
  • Unsurpassed quality you can trust
  • Validated for fit, form and function
  • Each Fel-Pro gasket, no matter how small, is engineered to exacting standards with proprietary design, engineering and manufacturing processes
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Yukon Gear – Powr Lok Flat Drive Plate For Dana 44 (Part No.16172)

Powr Lok Flat Drive Plate For Dana 44

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$31.99
Product Features:
  • Flat drive plate
  • Fits Dana Spicer 44 Powr Lok
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Yukon Gear – GM 9.5" Ring Gear Bolt (Part No.33047)

GM 9.5" Ring Gear Bolt

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$12.99
GM 9.5″ ring gear bolt. 12mm x 1.5.

Product Features:
  • Ring gear bolt for GM 9.2″
  • 12mm x 1.5
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Driveworks – Cylindrical Bearing (Part No.S-R1561TV)

Cylindrical Bearing

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$31.99
Value-priced bearing meets all cataloged application requirements.

Product Features:
  • Brand may vary by location
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FAG US – CONE (Part No.KJLM506849-A)

CONE

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$51.99
CONE

Yukon Gear – Master Overhaul Kit For GM ’88 And Older 14T Differential (Part No.14070)

Master Overhaul Kit For GM '88 And Older 14T Differential

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$429.99
Yukon Master Overhaul kits give you all the high quality parts you need to start & 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. Included in this kit are carrier bearings and races, pinion bearings and races, pinion seal, complete shim kit, pinion nut, crush sleeve (if applicable), oil baffles and slingers (if applicable), Thread locking compound, marking compound with brush, and gasket. Yukon’s Master Overhaul kits are the most comprehensive and complete kits on the market. They do extensive research to ensure that every kit is specially tailored to your application. This kit does not include ring gear bolts.

Product Features:
  • Fits 1988 and down GM 10.5″ 14 bolt truck
  • Included are Timken bearings and races, pinion bearings and races, pilot bearing, pinion seal, complete shim kit, pinion nut, crush sleeve , thread locker, marking compound with brush, and gasket.
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Yukon Gear – Aluminum Girdle Replacement Cover For Dana 44 Ta HD (Part No.32110)

Aluminum Girdle Replacement Cover For Dana 44 Ta HD

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$359.99
Aluminum Girdle replacement cover for Dana 44 TA HD.

Product Features:
  • Fits standard rotation Dana Spicer 44
  • Aluminum girdle cover
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Yukon Gear – Front 4340 Axle Kit For Dana 44’69-’80 GM Truck And Blazer, Dana 44 With 19/30 Splines (Part No.21413)

Front 4340 Axle Kit For Dana 44'69-'80 GM Truck And Blazer, Dana 44 With 19/30 Splines

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$1065.00
Yukon front 4340 Chrome-Moly replacement axle kit for Dana 44’69-’80 GM truck and Blazer, Dana 44 with 19/30 splines. Yukon 4340 Chrome-Moly axles provide up to 50% increased strength over stock axles for use in extreme performance applications with large tires and high horsepower. Yukon’s 4340 axles are manufactured using the latest technologies and the highest quality materials to ensure high strength and long life. This kit comes with inner & outer axles for both left and right sides along with Spicer universal joints. Limited Lifetime warranty covers manufacturing defects and axle breakage for as long as you own the vehicle. This warranty is not transferable to another party. “No Questions Asked” replacement for first warranty return, however Yukon reserves the right to either replace axle or refund original purchase price after the first warranty claim. Yukon (through Randy’s ring & pinion) makes final determination on warranty considerations.

Product Features:
  • Front axle kit
  • Fits 1969-1980 GM half ton front with Dana Spicer 44
  • 4340 Chromoly axles
  • 30 spline inner axles
  • Includes inner and outer axle shafts with Spicer u-joints
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Yukon Gear – Positraction Clutch Guide (Part No.33352)

Positraction Clutch Guide

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$8.99
Positraction clutch guide.

Product Features:
  • Clutch guide for Chrysler 9.25″, Dana Spicer 44, Dana Spicer 50, Ford 8.8″, GM 12 bolt passenger car, GM 8.2″, 8.5″ and 8.6″, 1963-1979 Corvette and Nissan Titan
  • Compatible with Dura Grip positractions only
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Yukon Gear – Bearing Race Driver (Part No.56011)

Bearing Race Driver

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$215.99
Bearing race driver for Dana 60 front, Dana 70U rear, Chrysler 8.75″ with 42 housing, and ’88 and older GM 14T. No return.

Product Features:
  • Bearing race driver
  • Fits HM803110 race
  • All steel construction
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Yukon Gear – Pinion Install Kit For Dana 44 Differential (Part No.13020)

Pinion Install Kit For Dana 44 Differential

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$264.99
Yukon Pinion installation kits are a terrific solution for gear installation on lower mileage vehicles where the carrier bearings & races can be reused. This kit uses Timken bearings and races along with a high quality pinion seal and small parts. Included in this kit are the pinion bearings and races, pilot bearing (if applicable), crush sleeve (if applicable), complete pinion shim kit, pinion nut, thread locker, and marking compound with brush. Yukon does extensive research for each application to make sure your kit will arrive with all the correct parts you need to install your pinion gear.

Product Features:
  • Fits standard rotation Dana Spicer 44 front
  • Included are pinion bearings and races, pinion seal, complete pinion shim kit, and marking compound with brush.
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Yukon Gear – Positraction Internals For 8.5" GM With 28 Spline Axles (Part No.16052)

Positraction Internals For 8.5" GM With 28 Spline Axles

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$336.99
Yukon positraction internals (0.795″ diameter) for 8.5″ GM with 28 spline axles. Yukon uses higher quality materials and better techniques than OEM to ensure a longer lasting spider gear set. This kit does not include clutches. All components come with a one year warranty against manufacturing defects. This kit is compatible with Yukon Dura Grip or Eaton positractions. It will not fit a factory Gov-Loc positraction.

Product Features:
  • Spider gear kit
  • Fits GM 8.5″ with 28 spline Dura Grip positraction
  • Includes two side gears, four pinion gears, cross pin shaft, roll pin and spider gear thrust washers.
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Yukon Gear – Dana 30 & Dana 44 Power Lok Bolt, Left Hand, & 8.75" Chrysler & 55P (Part No.33234)

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

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$26.99
Dana 30 & Dana 44 Power Lok bolt, left hand, & 8.75″ Chrysler & 55P.

Product Features:
  • Power Lok case bolt for Dana Spicer 30, Dana Spicer 44, Chrysler 8.75″ and 1955-1964 GM passenger car
  • Left hand thread
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Yukon Gear – Replacement Oil Baffle For Dana 44 (Part No.33000)

Replacement Oil Baffle For Dana 44

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$6.99
Product Features:
  • Oil baffle for Dana Spicer 44
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USA Standard Gear – Mini Spool For Dana 44 With 30 Spline Axles (Part No.59021)

Mini Spool For Dana 44 With 30 Spline Axles

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$149.99
Product Features:
  • Fits Dana Spicer 44 with 30 spline axles
  • Installs into a standard open carrier case
  • Provides 100% traction to both wheels at all times
  • Not recommended for street driven vehicles
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Yukon Gear – Dana 30 / 44 Roll Pin Replacement (Part No.33312)

Dana 30 / 44 Roll Pin Replacement

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$12.99
Dana 30 & Dana 44 roll PIN, 0.235″ DIA, for cross pin shaft.

Product Features:
  • Roll pin for Dana Spicer 30 and Dana Spicer 44
  • 0.235″ diameter
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Yukon Gear – Dura Grip Positraction For GM 8.5" & 8.6" With 30 Spline Axles (Part No.26016)

Dura Grip Positraction For GM 8.5" & 8.6" With 30 Spline Axles

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$929.99
The Yukon Dura Grip provides aggressive yet smooth traction to give you the confidence & performance you need. Get longer life and better traction with the heavy duty Yukon Dura Grip Positraction. The Yukon Dura Grip uses a nodular case and forged 4320 internals for added strength along with composite clutches for high performance and long life. All units are Rebuildable and many offer upgrades to increase aggressiveness for racing applications. Each unit carries a one year warranty against defects. This unit has larger bearing journals for added strength & uses heavy-duty carrier bearings & races.

Product Features:
  • Fits GM 8.5″ and 8.6″ with 30 spline axles
  • 2.73 ratio and up only
  • 4-spring, clutch style positraction
  • Internal gears are manufactured using forged 4320 steel and cut to provide stronger teeth
  • Fully rebuildable
  • Assembled in the USA
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Yukon Gear – Minor Install Kit For GM 9.5" Differential (Part No.12061)

Minor Install Kit For GM 9.5" Differential

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$138.99
Yukon Minimum installation kits are a low cost solution for gear changes in newer vehicles where the bearings can be reused. This kit uses all high quality components to ensure a smooth set up. kit includes a pinion seal, crush sleeve (if applicable), complete shim kit, marking compound and brush.

Product Features:
  • Fits 1997 and down GM 9.5″
  • Included are a pinion seal, crush sleeve, complete shim kit, marking compound and brush.
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Yukon Gear – O-Ring For Toyota & Dana 44 Zip Locker Seal Housing (Part No.34004)

O-Ring For Toyota & Dana 44 Zip Locker Seal Housing

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$11.29
Product Features:
  • O-ring for seal housing
  • Fits Dana Spicer 44 and Toyota 8″ and V6
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Pro-King – Differential Bearing Cone (Part No.742G255)

Differential Bearing Cone

from

$19.79
Pro-King is the leading supplier of transmission and driveline products in the aftermarket.

Product Features:
  • All products are designed to meet or exceed OE quality, form, fit and funtion.
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Yukon Gear – Carrier Installation Kit For GM 8.5" Differential With HD Bearings (Part No.57009)

Carrier Installation Kit For GM 8.5" Differential With HD Bearings

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$148.99
Yukon Carrier installation kits are great, low cost kit for carrier changes such as Positraction or locker upgrades. Carrier installation kit for GM 8.5″ differential with HD bearings for large journal carrier. This kit contains carrier bearings, races and shims. This kit is used in 8.5″ differentials using a Yukon Dura Grip, Eaton posi, ValueTrac, True Trac, Pro-Series Auburn, Detroit Locker or standard carrier with large bearing journals.

Product Features:
  • Fits GM 8.5″ with aftermarket positraction
  • Works with Heavy Duty Bearings
  • Includes carrier bearings and races and “super” carrier shim kit
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Yukon Gear – Replacement Carrier Shim Kit For Dana Spicer 44, 30 Spline Axles (Part No.55010)

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

from

$15.99
Product Features:
  • Carrier shim kit for Dana Spicer 30 with 30 spline axles
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Felpro – Axle Housing Cover Gasket (Part No.RDS 6629)

Axle Housing Cover Gasket

from

$6.49
Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design to ensure a perfect fit
  • Unsurpassed quality you can trust
  • Validated for fit, form and function
  • Each Fel-Pro gasket, no matter how small, is engineered to exacting standards with proprietary design, engineering and manufacturing processes
See More

Yukon Gear – 3 Qt – 80W90 Conventional Gear Oil With Posi Additive (Part No.15003)

3 Qt - 80W90 Conventional Gear Oil With Posi Additive

from

$57.99
3 Qt. Penzoil 80W90 conventional gear Oil. W/ bottle of Posi additive.

Product Features:
  • Includes three quarts of conventional oil and one 4oz bottle of Yukon positraction additive
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Yukon Gear – Dana 44 Grizzly Locker Replacement (Part No.28001)

Dana 44 Grizzly Locker Replacement

from

$998.99
The Yukon Grizzly Locker is the ultimate in locking differentials for street, off-road, & drag racing. Grizzly Lockers provide 100% power to both tires, while still allowing for disengagement while negotiating turns. The Yukon Grizzly locker is a mechanical locking differential. It features a forged case and 8620 internals for maximum strength. It’s patented design reduces common locker failures. All units assembled in the USA! All Grizzly Lockers are backed by the best warranty in the business! Yukon covers the replacement unit and covers any collaterally damaged parts and associated labor, up to $2,000!

Product Features:
  • Fits Dana Spicer 44 with 30 spline axles
  • 3.92 and up ratio only
  • Patented internal design reduces common locker failures
  • 8620 internals for added strength
  • Assembled in the USA
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Pro-King – Differential Internal Nest Kit (Part No.743B717)

Differential Internal Nest Kit

from

$221.99
Pro-King is the leading supplier of transmission and driveline products in the aftermarket.

Product Features:
  • All products are designed to meet or exceed OE quality, form, fit and funtion.
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Yukon Gear – Zip Locker Front Switch Cover (Part No.34009)

Zip Locker Front Switch Cover

from

$7.99
ZIP locker front switch cover.

Product Features:
  • Cover for switch
  • Front
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Yukon Gear – 8.5 Front Cover Gasket (Part No.23021)

8.5 Front Cover Gasket

from

$11.99
8.5 front cover gasket.

Product Features:
  • Cover gasket
  • Fits GM 8.5″ front
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Popular 1978 Chevrolet K20 Differentials Categories

1978 Chevrolet K20 Differentials

Maybe you’re in the middle of a full rebuild of that 1978 Chevrolet K20. Maybe you just need a couple of Differentials. Either way, Advance Auto Parts has 427 different Differentials in our inventory ranging from $0.91 to $1,566.99. That means you can find the exact parts or products you need to keep that 1978 Chevrolet K20 running smoothly.

Differentials are only as good as their brand. We stock 15 different brands to make sure you have plenty of trusted parts to choose from for your 1978 Chevrolet K20. Valvoline, FELPRO, and Driveworks are just some of the brands we stock. Search for brands you know or compare prices and reviews to help you decide!

We know you’ll find the perfect Differentials for your 1978 Chevrolet K20, but don’t take our word for it – read our customer ratings and reviews and buy with confidence. Out of the 3,864 reviews in this category, some of the top rated parts include Differential Shaft Lock Bolt with 4.0 stars and Differential Ring And Pinion with 5.0 stars.

So if you’re in the market for aftermarket Differentials to keep your 1978 Chevrolet K20 rolling for years to come, look no further. Shop online and have your products shipped direct to your door, or pick up at the nearest Advance Auto Parts location today!

Differentials Brands To Make Your 1978 Chevrolet K20 Last

Simple repair, complete replacement, or a full rebuild. No matter the job, your 1978 Chevrolet K20 demands trusted brand parts and products to keep it running. Many trusted brands of Differentials make up Advance Auto Parts’ inventory, and all are ready to help make your K20 the best it can be. Be sure to browse some of our top Differentials brands and parts.

Popular Mr. Gasket Differentials

We carry Mr. Gasket parts in our stock across Rear Differential Cover Gaskets categories, plus more. For a 1978 Chevrolet K20, our most popular Mr. Gasket Differentials include:
Differential Gasket
from $18.09
(1)
Differential Gasket
Rear Differential Cover Gaskets

Top 1978 Chevrolet K20 Differentials from Felpro

Felpro products are another trusted brand when it comes to Differentials for your 1978 Chevrolet K20. Popular Felpro parts include:
Differential Cover Gasket
from $9.99
(195)
Differential Cover Gasket
Rear Differential Cover Gaskets
Differential Cover Gasket
from $6.79
(13)
Differential Cover Gasket
Rear Differential Cover Gaskets
Axle Housing Cover Gasket
from $6.49
(10)
Axle Housing Cover Gasket
Rear Housing Cover Gaskets

FAQs for 1978 Chevrolet K20 Differentials

What are the most purchased Differentials for the 1978 Chevrolet K20?

Out of 427 Differentials for the 1978 Chevrolet K20, the most popular in our inventory are:
DEX/MERC Automatic Transmission Fluid, 1 Gallon
from $35.99
(17)
DEX/MERC Automatic Transmission Fluid, 1 Gallon
Differential Oil
Tapered Cone/Cup Wheel Bearing Set
from $13.99
(14)
Tapered Cone/Cup Wheel Bearing Set
Front Differential Pinion Bearings

What are the top-rated 1978 Chevrolet K20 Differentials?

Top-rated Differentials for your 1978 Chevrolet K20 based on customer reviews/ratings are:
Differential Shaft Lock Bolt
from $5.99
(11)
Differential Shaft Lock Bolt
“great”
Differential Ring And Pinion
from $350.99
(7)
Differential Ring And Pinion
“Great spark plugs.”
Bearings
from $23.99
(7)
Bearings
“Good price”