1978 GMC K25 Drivetrains

Essential 1978 GMC K25 Drivetrains

Motive Gear – Differential Mini Spool (Part No.MSD44-30)

Differential Mini Spool

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$101.99


Product Features:
  • MINI SPOOL – DANA 44, 30 SPL.
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Yukon Gear – Dura Grip Positraction For 10.5" GM 14 Bolt Truck, 4.10 & Down (Part No.26030)

Dura Grip Positraction For 10.5" GM 14 Bolt Truck, 4.10 & Down

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$1099.99
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.

Product Features:
  • Fits GM 10.5″ 14 bolt truck
  • 4.10 ratio and down only
  • 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 – Replacement Outer Oil Slinger For Dana 25, 27, 30, 44 & 50 (Part No.33011)

Replacement Outer Oil Slinger For Dana 25, 27, 30, 44 & 50

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$5.99
Product Features:
  • Outer oil slinger for Dana Spicer 25, 27, 30, 44 and 50
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Yukon Gear – Spindle Nut For Dana 30 & Dana 44, .372" Thick (Part No.33474)

Spindle Nut For Dana 30 & Dana 44, .372" Thick

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$22.99
Spindle nut for Dana 30 & Dana 44, .372″ thick. This replaces Spicer part number 21588X.

Product Features:
  • Spindle nut for Dana Spicer 30 and 44
  • 0.372″ thick
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Yukon Gear – Dana 25 / 27 / 30 / 36 / 44 / 53 Pinion Nut Washer Replacement (Part No.33163)

Dana 25 / 27 / 30 / 36 / 44 / 53 Pinion Nut Washer Replacement

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$3.99
Replacement pinion nut washer for Dana 25, 27, 30, 36, 44 & 53.

Product Features:
  • Pinion nut washer for Dana Spicer 25, 27, 30, 44 and 50
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Motive Gear – Differential Pinion Shim Kit (Part No.GM14SK)

Differential Pinion Shim Kit

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$22.99


Product Features:
  • KIT SHIM GM 10.5 14 BLT
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USA Standard Gear – Replacement Ring & Pinion Gear Set For Dana 44 In A 5.13 Ratio (Part No.36050)

Replacement Ring & Pinion Gear Set For Dana 44 In A 5.13 Ratio

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$287.99
USA Standard ring & pinion sets are the right choice to add confidence to your install. USA Standard Gear offers a full line of ring & pinion sets for a variety of common & hard to find applications. USA standard gear offers a standard one year warranty against defects on their ring & pinion sets.

Product Features:
  • Fits standard rotation Dana Spicer 44
  • 8.50″ ring gear diameter
  • 26 spline pinion
  • 10 ring gear bolts
  • 5.13 ratio
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Yukon Gear – Spindle Bearing For Dana 44 (Part No.33493)

Spindle Bearing For Dana 44

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$23.99
Spindle bearing for Dana 44. This replaces Spicer part number 550759.

Product Features:
  • Spindle bearing
  • Fits Dana Spicer 44
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Motive Gear – Axle Shaft (Part No.41677R)

Axle Shaft

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$63.99
The Motive Gear replacement axle shaft offers an OE-quality axle shaft at a fraction of the OE cost. Manufactured from 1541H material on high-tolerance CNC equipment, this axle shaft is designed to provide a perfect fit every time.

Product Features:
  • GM ’73-87 SHAFT OUTER 1/2 & 3/4 TON 19SP-JEEP ’74-92 W/ DISK BRAKES
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USA Standard Gear – Standard Spider Gear Set For GM 8.5", 30 Spline (Part No.39027)

Standard Spider Gear Set For GM 8.5", 30 Spline

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$214.99
Product Features:
  • Spider gear kit
  • Fits GM 8.5″ 30 spline open differential
  • Includes two side gears, two pinion gears, cross pin shaft, cross pin bolt and spider gear thrust washers.
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National – Multi Purpose Seal (Part No.5131)

Multi Purpose Seal

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$14.99
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:
  • Low swell in hydrocarbon fluids
  • Design type: spring loaded; multi-lip
  • Provides good low temperature capability
  • Temperature range: -40°F to 225°F; -40°C to 107°C
  • Delivers quality and reliable performance for every type of repair
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Neapco – Double Cardan CV Ball Seat Repair Kit (Part No.7-0081)

Double Cardan CV Ball Seat Repair Kit

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$30.49
Double Cardan CV Ball Seat Repair Kit
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National – Multi Purpose Bearing (Part No.HB-206-FF)

Multi Purpose Bearing

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$46.49
National Oil Seals & Bearings offer a full line of premium oil seals and bearings.

Product Features:
  • Premium bearing design matches OEM specifications
  • Precision manufactured using premium-grade steel for outstanding durability and performance
  • Controlled heat treating process for lasting performance and extended bearing life
  • Industry leading coverage
  • Professional technicians know they can depend on National
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Yukon Gear – Replacement Redi-Sleeve Yoke Saver For Dana 25, Dana 27, Dana 30, Dana 44, Dana 50 (Part No.30222)

Replacement Redi-Sleeve Yoke Saver For Dana 25, Dana 27, Dana 30, Dana 44, Dana 50

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$162.99
Replacement redi-sleeve yoke saver for Dana 25, Dana 27, Dana 30, Dana 44, Dana 50 .Yukon Mighty seal.

Product Features:
  • Pinion Redi-sleeve
  • Fits Dana Spicer 25, 27, 30, 4 and 50
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Driveworks – Taper Bearing Cup (Part No.S-LM-501314)

Taper Bearing Cup

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$7.29
Value-priced bearing meets all cataloged application requirements.

Product Features:
  • Brand may vary by location
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National – Bearings (Part No.M88048)

Bearings

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$15.99
National Oil Seals & Bearings offer a full line of premium oil seals and bearings.

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
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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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$21.99
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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National – Bearings (Part No.2793)

Bearings

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$38.99
National Oil Seals & Bearings offer a full line of premium oil seals and bearings.

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
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Pro-King – Differential Pinion Yoke Washer (Part No.742A215)

Differential Pinion Yoke Washer

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$3.99
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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Motive Gear – Differential Bearing Kit – Timken (Part No.R14RT)

Differential Bearing Kit - Timken

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$145.99
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

Product Features:
  • KIT BRG & SEAL GM 14 BLT 10.5″
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National – Shaft Repair Sleeve (Part No.99138)

Shaft Repair Sleeve

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$27.49
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:
  • 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
  • Installation tool reduces sleeve distortion and allows for installation without removal from the shaft
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Driveworks – Oil Seal (Part No.S-416273)

Oil Seal

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$2.99
Value-priced seal meets all cataloged application requirements.

Product Features:
  • Brand may vary by location
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Yukon Gear – Grizzly Locker, Fits Dana 44, 30 Spline, 3.73 & Down (Part No.28021)

Grizzly Locker, Fits Dana 44, 30 Spline, 3.73 & Down

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$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
  • 3.73 and down ratio only
  • Patented internal design reduces common locker failures
  • 8620 internals for added strength
  • Assembled in the USA
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Yukon Gear – Redline Synthetic "Shock Proof" Oil – 3 Quarts (Part No.15000)

Redline Synthetic "Shock Proof" Oil - 3 Quarts

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$99.99
Redline Synthetic “Shock Proof” Oil. 3 Quarts.

Product Features:
  • Includes three quarts of Redline Shockproof oil
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Dorman – Help – Differential Shaft Lock Bolt (Part No.81048)

Differential Shaft Lock Bolt

from

$5.99
This differential pinion shaft lock bolt is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.

Product Features:
  • Direct replacement – this differential pinion shaft lock bolt matches the fit and function of the factory part on specified years, makes and models
  • Ideal solution – this bolt is a reliable replacement for an original part that is missing or has failed due to fatigue
  • Durable construction – this part is made from quality materials to ensure reliable performance and long service life
  • Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience
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Yukon Gear – Dana 44 Cover Gasket Replacement (Part No.23006)

Dana 44 Cover Gasket Replacement

from

$12.99
Product Features:
  • Cover gasket
  • Fits Dana Spicer 44
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USA Standard Gear – Master Overhaul Kit for the GM 8.5 Front Differential (Part No.37056)

Master Overhaul Kit for the GM 8.5 Front Differential

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$238.99
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.

Product Features:
  • Fits GM 8.5″ front
  • Uses Koyo bearings and races
  • Included are carrier bearings and races, pinion bearings and races, pinion seal, axle seals, complete shim kit, ring gear bolts, pinion nut, crush sleeve, thread locker, marking compound with brush and gasket.
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Pro-King – Differential Cover Plug (Part No.742G484)

Differential Cover Plug

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$6.59
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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Popular 1978 GMC K25 Drivetrains Categories

1978 GMC K25 Drivetrains

You count on your 1978 GMC K25 to run right. That means taking care of it with regular maintenance, necessary repairs, and the right parts. Advance Auto Parts can help with all of that thanks to our extensive inventory of trusted Drivetrains. With 557 Drivetrains ranging in price from $0.91 to $1,497.99, you’re sure to find everything you need for your 1978 GMC K25.

Brands matter. If you want to shop a specific Drivetrains brand, we stock 21 different brands like Moog, DriveWorks, and Felpro. 1978 GMC K25 Drivetrains start as low as $0.91!

One of the best ways to find top quality OEM or aftermarket Drivetrains is by asking professionals. Short of that, you can shop with confidence thanks to our 6,450 extensive product reviews on 1978 GMC K25 Drivetrains. Some of the top-rated Drivetrains products we carry are Greaseable Super Strength Universal Joint with 4.4 stars and Greaseable Super Strength Universal Joint with 4.6 stars.

Did we mention you can order your Drivetrains from our online catalog and have them shipped right to your garage? Or, if you feel like seeing the parts first-hand, search for your nearest Advance Auto Parts location above and pick up in-store when you’re ready. Browse our full Drivetrains inventory for your 1978 GMC K25 below to get started!

Top-Rated Drivetrains Brands For Your 1978 GMC K25

Trusted Drivetrains OEM and aftermarket product brands are what Advance Auto Parts specializes in. The brands we work with are sure to keep that 1978 GMC K25 running right for years to come. In our inventory you’ll find brands like Moog, DriveWorks, Felpro, and even more.

Popular Mr. Gasket Drivetrains

You’ll find popular Mr. Gasket brand products across Differentials. All are waiting to get your 1978 GMC K25 back on the road. Some of the top-rated Mr. Gasket products in these categories are:
Differential Gasket
from $15.99
(1)
Differential Gasket
Rear Differential Cover Gaskets

FAQs for 1978 GMC K25 Drivetrains

What are the most purchased Drivetrains for the 1978 GMC K25?

Out of 557 Drivetrains for the 1978 GMC K25, the most popular in our inventory are:
Differential Cover Gasket
from $9.99
(195)
Differential Cover Gasket
Rear Differential Cover Gaskets
Universal Joint
from $20.29
(52)
Universal Joint
U-Joints
Greaseable Super Strength Universal Joint
from $36.99
(41)
Greaseable Super Strength Universal Joint
U-Joints

What are the top-rated 1978 GMC K25 Drivetrains?

Top-rated Drivetrains for your 1978 GMC K25 based on customer reviews/ratings are:
Greaseable Super Strength Universal Joint
from $47.99
(39)
Greaseable Super Strength Universal Joint
“Great”
Greaseable Super Strength Universal Joint
from $32.99
(37)
Greaseable Super Strength Universal Joint
“grease fitting I like location dont like needle design to grease should be regular design fitting”
Universal Joint
from $20.49
(33)
Universal Joint
“Would definitely recommend buying again.”