1975 GMC K25 Differentials

Find your specific 1975 GMC K25 original or aftermarket Differentials below. Order your parts online and have delivered to your home or pick up in-store at Advance Auto.

Essential 1975 GMC K25 Differentials

from

$289.99

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 standard rotation Dana Spicer 44 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, oil baffles and slingers, thread locker, marking compound with brush and gasket.

from

$1302.99

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 selectability. The Yukon Zip locker is an air operated locker that provides selectable traction for off road or street use. This unit features 4320 Chrome Moly internals for added strength. Assembled in the USA! compressor sold separately. All Zip Lockers are backed by the best warranty in the business! All Zip Lockers come with a six (6) year warranty, including any collaterally damaged parts and associated labor, up to $2,000, for the first two (2) years.

Product Features:

Fits Dana Spicer 44 with 30 spline axles
3.92 and up ratio only
Forged case and 8620 internals for added strength
Works with a variety of air delivery systems
Assembled in the USA

from

$148.99

Redline Synthetic “Shock Proof” Oil with positraction Additive. 4 Quarts.

Product Features:

Includes four quarts of Redline Shockproof oil and one 4oz bottle of Yukon positraction additive

from

$15.99

Standard open side gear thrust washer for 8.5″ GM.

Product Features:

Side gear thrust washer
Fits GM 8.5″

from

$1110.00

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

from

$188.99

Mini spools are a low-cost traction option for vehicles looking for full-time lockup. The mini spool installs into a standard open carrier and give 100% power to both tires at all times. These units are not recommended for street-driven vehicles. We recommend full spools for vehicles with large tires or high horsepower. These units come with a one year warranty against manufacturing defects.

Product Features:

Fits GM 8.5″ 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

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
3.73 and down ratio only
Patented internal design reduces common locker failures
8620 internals for added strength
Assembled in the USA

from

$207.99

Yukon standard open spider gear kit for 8.5″ GM with 30 spline axles. Yukon uses higher quality materials and better techniques than OEM to ensure a longer lasting spider gear set. All components come with a one year warranty against manufacturing defects.

Product Features:

Spider gear kit
Fits GM 8.5″ open differential with 30 spline axles
Includes two side gears, two pinion gears, cross pin shaft, cross pin bolt and spider gear thrust washers.

from

$99.99

Zip Locker soleniod valve.

Product Features:

Solenoid valve

from

$389.99

Yukon Ring & Pinion sets give you the confidence of knowing you’re running gears designed for the harshest of conditions. Whether it’s on the street, off-road, or at the track; Yukon ring & pinion sets deliver unrivaled performance & quality. Yukon uses the latest designs and manufacturing technologies to provide a quiet running gear that is strong and easy to set up. All Yukon ring & pinion sets come standard with a one-year warranty. This gear set does not have an ABS provision on the pinion.

Product Features:

Fits GM 8.5″ and 8.6″
8.50″ ring gear diameter
30 spline pinion
10 ring gear bolts
4.56 ratio

from

$315.99

Yukon standard open spider gear kit for GM 10.5″ and 14T with 30 spline axles. Yukon uses higher quality materials and better techniques than OEM to ensure a longer lasting spider gear set. All components come with a one year warranty against manufacturing defects.

Product Features:

Spider gear kit
Fits GM 10.5″ 14 bolt truck open differential
Includes two side gears, four pinion gears, cross pin shaft, cross pin bolt and spider gear thrust washers.

from

$83.99

Product Features:

Seal housing for Dana Spicer 44
Includes o-rings

from

$4.99

Dana 44, GM55P & 8.2″ GM pinion gear Thrust washer.

Product Features:

Pinion gear thrust washer for Dana Spicer 44, GM 8.2″ and 1955-1964 GM passenger car

from

$6.99

Product Features:

Oil baffle for Dana Spicer 44

from

$591.99

For vehicles that are driven daily, the Powertrax 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 Powertrax No-Slip locker easily installs in to your differential carrier using basic tools and without affecting your ring and pinion settings. Powertrax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Powertrax Grip-Pro and Grip-LS performance limited slips offer smooth dependable torque transfer and traction for the best of both worlds!The Powertrax® Lock-Right Locker provides outstanding traction for off-road machines and race vehicles. Powertrax No-Slip Traction Systems deliver excellent performance to street-driven cars and trucks.

Powertrax® lockers range from the original, Lock-Right for serious straight-line performance, to the No-Slip traction system for street-able vehicles.

Powertrax® offers three levels of GRIP locking differentials, ranging from the clutch-type GRIP LS with a forged steel case, the gear-driven GRIP PRO and finally the GRIP LOK for extreme traction.

Powertrax® = Extreme Traction Systems!

from

$67.99

Powr Lok button kit
Fits Dana Spicer 30, 44 and Chrysler 8.75″

from

$57.99

Product Features:

Crush sleeve eliminator kit for GM 8.5″, 8.6″ and Chrysler 9.25″ rear

from

$215.99

Bearing race driver. No return.

Product Features:

Bearing race driver
Fits M802011 race
All steel construction

from

$2.49

Product Features:

RING GEAR BOLT 8.5″ 7.5″ 7/16 X 20 LEFT HAND

from

$271.99

Yukon Bearing installation kits are perfect for shops & builders who have shims on the shelf and are looking to save cost over a Master Overhaul kit. This kit uses Timken bearings and races along with all high quality small parts. kit includes carrier bearings and races, pinion bearings and races, pinion seal, crush sleeve (if applicable), oil baffles and slingers (if applicable), marking compound and brush. Yukon does extensive research for each application to make sure your kit will arrive with all the correct parts you need to install your ring & pinion set. 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″ front with aftermarket positraction
Included are carrier bearings and races, pinion bearings and races, pinion seal, crush sleeve, marking compound and brush.

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

from

$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.

from

$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.

from

$28.49

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.

from

$5.99

Product Features:

Outer oil slinger for Dana Spicer 25, 27, 30, 44 and 50

from

$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

from

$27.99

Beck/Arnley parts meet foreign nameplate OE specifications for form, fit and function. Our product specialists work with a network of global sourcing partners so you can install the right part with confidence.

Product Features:

Matches OE form, fit and function
ABS magnet included if applicable
Made with high quality materials
Quality construction for durability
Application specific for this vehicle

from

$5.99

DiffrlPinSupportBolt

Popular 1975 GMC K25 Differentials Categories

Differential Oil

Rear Differential Cover Gaskets

Differential Open Unit and Components

Differential Covers

Differential Pinion Shaft Lock Bolts

Differential Bearings

Differential Axle Shafts

Differential Pinion Pilot Bearings

Differential Cover Bolts

Differential Carriers

Differential Bearing Kits

Front Differential Pinion Bearings

Differential Spider Gear Kits

Differential Rebuild Kits

Differential Carrier Shim Kits

Differential Pinion Seals

Differential Cover Plugs

Differential Clutch Packs

Differential Ring and Pinions

Differential End Yokes

Differential Pinion Supports

Differential Lock Assemblies

Differential Air System Seal Housings

Rear Differential Pinion Bearings

Differential Spools

Differential Carrier Bearings

Rear Housing Cover Gaskets

Differential Pinion Bearing Kits

Differential Seals

Complete Differentials

Differential Ring Gear Bolts

Bearing Race Drivers

Differential Crush Sleeves

Differential Side Bearing Spacers

Differential Pinion Shims

Differential Pinion Shaft Nuts

Differential Gear Install Kits

Differential Cross Pins

Differential Side Gear Thrust Washers

Differential Pinion Bearing Baffles

Differential Pinion Gear Thrust Washers

Differential Drive Pinion Gear Bearing Retainer Bolts

Differential Drive Pinion Oil Deflectors

Differential Carrier Bolts

Differential Pinion Gear Washers

Limited Slip Differential Assemblies

Differential Spider and Pinion Gear Kits

Differential Clutch Pack Clips

Differential Lock Thrust Blocks

Maybe you’re in the middle of a full rebuild of that 1975 GMC K25. Maybe you just need a couple of Differentials. Either way, Advance Auto Parts has 265 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 1975 GMC K25 running smoothly.

Differentials are only as good as their brand. We stock 16 different brands to make sure you have plenty of trusted parts to choose from for your 1975 GMC K25. Valvoline, Yukon Gear, and FELPRO 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 1975 GMC K25, but don’t take our word for it – read our customer ratings and reviews and buy with confidence. Out of the 255 reviews in this category, some of the top rated parts include Tapered Roller Bearing with 5.0 stars and Oil Seal with 4.3 stars.

So if you’re in the market for aftermarket Differentials to keep your 1975 GMC K25 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 1975 GMC K25 Last

Simple repair, complete replacement, or a full rebuild. No matter the job, your 1975 GMC K25 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 K25 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 1975 GMC K25, our most popular Mr. Gasket Differentials include:

from $18.09

(1)

Differential Gasket

Rear Differential Cover Gaskets

Top 1975 GMC K25 Differentials from Valvoline

Valvoline products are another trusted brand when it comes to Differentials for your 1975 GMC K25. Popular Valvoline parts include:

from $35.99

(17)

DEX/MERC Automatic Transmission Fluid, 1 Gallon

Differential Oil

from $14.49

(2)

DEXRON – VI ATF Full Synthetic Automatic Transmission Fluid, 1 Quart

Differential Oil

FAQs for 1975 GMC K25 Differentials

What are the most purchased Differentials for the 1975 GMC K25?

Out of 265 Differentials for the 1975 GMC K25, the most popular in our inventory are:

from $57.99

This product is not rated

3 Qt – 80W90 Conventional Gear Oil With Posi Additive

Differential Oil

from $6.49

(10)

Axle Housing Cover Gasket

Rear Housing Cover Gaskets

from $23.29

(4)

Multi Purpose Seal

Differential Pinion Seals

What are the top-rated 1975 GMC K25 Differentials?

Top-rated Differentials for your 1975 GMC K25 based on customer reviews/ratings are:

from $8.49

(7)

Tapered Roller Bearing

“Nice to find them in stock. Fit well and got my SUV up and back on the road quickly”

from $10.49

(3)

Oil Seal

“Fit the rear Dana 44 on my TJ just fine and stopped the leaking.”

from $43.99

(2)

Shaft Repair Sleeve

“As a mechanic I dont have time or money to waste on inferior products, which this is not. Great product,great price”

1975 GMC K25 Differentials

More 1975 GMC K25 Differentials

Essential 1975 GMC K25 Differentials

USA Standard Gear – Master Overhaul Kit for the Dana 44 Differential with 30 Spline (Part No.37008)

Yukon Gear – Zip Locker For Dana 44 With 30 Spline Axles, 3.92 & Up (Part No.34020)

Yukon Gear – Redline Synthetic "Shock Proof" Oil With Positraction Additive – 4 Quarts (Part No.15005)

Yukon Gear – Standard Open Side Gear Thrust Washer For 8.5" GM (Part No.33304)

Yukon Gear – Dura Grip Positraction For 10.5" GM 14 Bolt Truck, 4.10 & Down (Part No.26030)

Yukon Gear – Mini Spool For GM 8.5" With 30 Spline Axles (Part No.32233)

Yukon Gear – Grizzly Locker, Fits Dana 44, 30 Spline, 3.73 & Down (Part No.28021)

Yukon Gear – Standard Open Spider Gear Kit For 8.5" GM With 30 Spline Axles (Part No.16055)

Yukon Gear – Zip Locker Soleniod Valve (Part No.34014)

Yukon Gear – High Performance Ring & Pinion Gear Set For GM 8.5" & 8.6" In A 4.56 Ratio (Part No.24161)

Yukon Gear – Standard Open Spider Gear Kit For GM 10.5" And 14T With 30 Spline Axles (Part No.16044)

Yukon Gear – Seal Housing For Dana 44, Zip Locker, With O-Rings (Part No.34013)

Yukon Gear – Dana 44 Pinion Gear Thrust Washer (Part No.33281)

Yukon Gear – Replacement Oil Baffle For Dana 44 (Part No.33000)

Powertrax – No-Slip Traction System (Part No.9207053000)

Yukon Gear – Powr Lok Button Kit For Dana 30, Dana 44 & Chrysler 8.75" (Part No.33536)

Yukon Gear – Crush Sleeve Eliminator Kit For GM 8.5" & Chrysler 9.25" (Part No.55048)

Yukon Gear – Bearing Race Driver (Part No.56020)

Motive Gear – Ring Gear Bolt (Part No.14066913)

Yukon Gear – Bearing Install Kit For GM 8.5" HD Front Differential (Part No.11070)

Felpro – Axle Housing Cover Gasket (Part No.RDS 6629)

Yukon Gear – Pinion Install Kit For Dana 44 Differential (Part No.13020)

Pro-King – Differential Cover Plug (Part No.742G484)

Pro-King – Differential Cross Shaft (Part No.742G673)

Yukon Gear – Replacement Outer Oil Slinger For Dana 25, 27, 30, 44 & 50 (Part No.33011)

Yukon Gear – Dana 25 / 27 / 30 / 36 / 44 / 53 Pinion Nut Washer Replacement (Part No.33163)

Beck/Arnley – Wheel Bearing (Part No.051-3936)

Yukon Gear – DiffrlPinSupportBolt (Part No.33582)

Popular 1975 GMC K25 Differentials Categories