1973 GMC K15/K1500 Pickup Differentials

Keep Your 1973 GMC K15/K1500 Pickup in Top Shape with Quality Differentials

Whether you’re repairing or upgrading your Differential, using high-quality parts is key to keeping your 1973 GMC K15/K1500 Pickup 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, Motive Gear, and FELPRO. For example, National Differentials start at just $7.99 with an average 4.3 star rating. Motive Gear and FELPRO offer similar pricing and quality, backed by strong customer feedback. With over 645 reviews and a solid 4 star average, you can shop with confidence knowing other GMC K15/K1500 Pickup owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1973 GMC K15/K1500 Pickup Differential at Advance Auto Parts is around $242.91, with a range that starts at $0.91 and goes up to $1,969.99. With 331 options in stock from 12 trusted brands, finding the right fit is easy. Popular picks like DEXRON – VI ATF Full Synthetic Automatic Transmission Fluid, 1 Quart, DEX/MERC ATF Conventional Automatic Transmission Fluid, 1 Quart, and Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket start at just $7.99 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 1973 GMC K15/K1500 Pickup in peak condition, inside and out.

Essential 1973 GMC K15/K1500 Pickup Differentials

Yukon Gear – Standard Open Spider Gear Kit For GM 12 Bolt Car And Truck With 30 Spline Axles (Part No.16043)

Standard Open Spider Gear Kit For GM 12 Bolt Car And Truck With 30 Spline Axles

from

$207.99
Yukon standard open spider gear kit for GM 12P and 12T 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 12 bolt passenger car and truck open differential with 30 spline axles
  • Includes two side gears, two pinion gears, cross pin shaft, cross pin bolt and spider gear thrust washers.
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Yukon Gear – Dana 60 & Dana 61 Tracloc Clutch Set (Part No.16156)

Dana 60 & Dana 61 Tracloc Clutch Set

from

$269.99
Dana 60 & Dana 61 TracLoc clutch set.

Product Features:
  • Clutch kit
  • Fit Dana Spicer 60 Trac Loc positraction
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Powertrax – Lock Right Locker (Part No.2415-LR)

Lock Right Locker

from

$442.99
The Powertrax Lock-Right ultra-strength alloy locker’s straight-line performance is equal to a solid spool, but automatically unlocks in turns. Best suited for extreme off-road to severe on-road use, Powertrax Lock Right lockers replace the spider gears in your open differential carrier using basic tools and without affecting your ring and pinion settings. The whole job can be done in your driveway in a couple of hours, pin included! 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!
  • See More

    Yukon Gear – Pinion Nut Washer (Part No.33166)

    Pinion Nut Washer

    from

    $23.99
    Pinion nut washer for GM 12 bolt car & truck, 55-62 GM car & truck, GM 8.2″ & 63-79 Corvette.

    Product Features:
    • Pinion nut washer for GM 12 bolt car and truck, 1955-1964 GM car and truck, GM 8.2″ and 1963-1979 Corvette.
    See More

    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

    from

    $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
    See More

    Driveworks – Oil Seal (Part No.S-8460N)

    Oil Seal

    from

    $9.79
    Value-priced seal meets all cataloged application requirements.

    Product Features:
    • Brand may vary by location
    See More

    Motive Gear – Differential Ring and Pinion (Part No.D44-538)

    Differential Ring and Pinion

    from

    $227.99


    Product Features:
    • DANA-44 R/P 5.38 STD MG
    See More

    Yukon Gear – Side Gear Thrust Washer For Dana 60, 70 & 80 (Part No.33532)

    Side Gear Thrust Washer For Dana 60, 70 & 80

    from

    $4.99
    Product Features:
    • Side gear thrust washer for Dana Spicer 60, 70, 70U, 70HD and 80
    • Fits standard open differentials only
    See More

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

    Redline Synthetic "Shock Proof" Oil With Positraction Additive - 4 Quarts

    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
    See More

    Yukon Gear – 3/8" Ring Gear Bolt Washer For GM 12 Bolt Car & Truck, 8.2 Bop & More (Part No.33347)

    3/8" Ring Gear Bolt Washer For GM 12 Bolt Car & Truck, 8.2 Bop & More

    from

    $4.99
    3/8″ ring gear bolt washer for GM 12 bolt car & truck, 8.2 BOP & more.

    Product Features:
    • Ring gear bolt washer for GM 12 bolt car and truck, 1955-1964 passenger car, 1963-1979 Corvette and 8.2″ Buick, Oldsmobile and Pontiac
    See More

    Yukon Gear – Replacement Carrier Shim Kit For Dana 60, 61 & 70U (Part No.55020)

    Replacement Carrier Shim Kit For Dana 60, 61 & 70U

    from

    $104.99
    Product Features:
    • Carrier shims for Dana Spicer 60 and 70U
    See More

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

    Differential Cover Plug

    from

    $6.99
    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.
    See More

    Yukon Gear – Replacement Trail Repair Kit For Dana 60 With 1350 Size U/Joint And U-Bolts (Part No.32284)

    Replacement Trail Repair Kit For Dana 60 With 1350 Size U/Joint And U-Bolts

    from

    $239.99
    Yukon replacement trail repair kit for Dana 60 with 1350 size U/joint and u-bolts. This kit comes with a yoke, U/joint, pinion seal, U/bolt or strap kit, pinion nut, and pinion nut washer (if applicable).

    Product Features:
    • Fits Dana Spicer 60 and 70
    • 1350 u-joint size
    • Kit includes yoke, U-joint, pinion seal, pinion nut and washer, U-bolts and threadlocker
    See More

    Yukon Gear – Dura Grip Positraction For GM 12 Bolt Truck With 30 Spline Axles, 3.73 & Up (Part No.26035)

    Dura Grip Positraction For GM 12 Bolt Truck With 30 Spline Axles, 3.73 & Up

    from

    $859.99
    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 12 bolt truck with 30 spline axles
    • 3.73 and up ratio 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
    See More

    Felpro – Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket (Part No.RDS 6629)

    Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket

    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.

    Product Features:
    • Meets or exceeds all original equipment specifications
    • Application specific design to ensure a perfect fit
    • Engineered for the sealing repair environment
    • Validated for fit, form and function
    • Unsurpassed quality you can trust
    See More

    Yukon Gear – High Performance Replacement Ring & Pinion Gear Set For Dana 44 In A 5.38 Ratio (Part No.24045)

    High Performance Replacement Ring & Pinion Gear Set For Dana 44 In A 5.38 Ratio

    from

    $439.99
    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.

    Product Features:
    • Fits standard rotation Dana Spicer 44
    • 8.50″ ring gear diameter
    • 26 spline pinion
    • 10 ring gear bolts
    • 5.38 ratio
    See More

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

    Powr Lok Button Kit For Dana 30, Dana 44 & Chrysler 8.75"

    from

    $67.99
    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 t

    Product Features:
    • Powr Lok button kit
    • Fits Dana Spicer 30, 44 and Chrysler 8.75″
    See More

    Yukon Gear – Pinion Depth Shim Kit For Toyota8", GM 7.5", 8.2" & 12 Bolt Truck (Part No.55064)

    Pinion Depth Shim Kit For Toyota8", GM 7.5", 8.2" & 12 Bolt Truck

    from

    $39.99
    8″ Toyota, 7.5″ GM, 8.2″ GM, 12T, pinion shim set, & Mazda truck.

    Product Features:
    • Pinion depth shim kit for Toyota 7.5″, 8″ and V6
    See More

    Yukon Gear – Positraction Clutch Guide (Part No.33352)

    Positraction Clutch Guide

    from

    $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
    See More

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

    Replacement Oil Baffle For Dana 44

    from

    $6.99
    Product Features:
    • Oil baffle for Dana Spicer 44
    See More

    Yukon Gear – Replacement Ring Gear Bolt For Model 35, Dana 25, 27, 30 & 44 – 3/8" X 24 (Part No.33038)

    Replacement Ring Gear Bolt For Model 35, Dana 25, 27, 30 & 44 - 3/8" X 24

    from

    $11.99
    Replacement ring gear bolt for Model 35, Dana 25, 27, 30 & 44. 3/8″ x 24.

    Product Features:
    • Ring gear bolt for Dana Spicer 25, 27, 30, 44 and AMC Model 35
    • 3/8″ x 24 thread
    See More

    Yukon Gear – Replacement Standard Open Carrier Case For Dana 44, 30 Spline, 3.92 & Up, Bare (Part No.20116)

    Replacement Standard Open Carrier Case For Dana 44, 30 Spline, 3.92 & Up, Bare

    from

    $155.99
    Yukon replacement standard open carrier case for Dana 44, 30 spline, 3.92 & up, bare. This case includes carrier shims, roll pin, ring gear bolts and a cover gasket.

    Product Features:
    • Standard open carrier case
    • Fits Dana Spicer 44 with 30 spline axles
    • 3.92 and up ratio only
    • Does not include spider gears
    • Includes ring gear bolts, carrier shim kit, roll pin and cover gasket
    See More

    National – Bearing Race (Part No.HM803110)

    Bearing Race

    from

    $20.49
    Manufactured with premium-grade steel, National taper bearing cups feature crowned raceways to ensure even load distribution.

    Product Features:
    • PREMIUM MATERIALS – Precision manufactured using premium-grade steel for outstanding durability and performance
    • SMOOTH ROTATION – Crowned raceways for even load distribution
    • OE-STYLE DESIGN – Engineered to meet OE specifications
    • COMPREHENSIVE COVERAGE – Industry-leading coverage for domestic and import applications
    • RIGOROUS TESTING – Comprehensive testing throughout design and development processes by National engineers for quality you can count on
    See More

    Yukon Gear – Polished Aluminum Replacement Cover For Dana 60 (Part No.32024)

    Polished Aluminum Replacement Cover For Dana 60

    from

    $269.99
    Polished aluminum replacement cover for Dana 60 (standard rotation only).

    Product Features:
    • Fits standard rotation Dana Spicer 60
    • Finned polished aluminum
    See More

    Yukon Gear – Dana 25, 27, 30, 44, Model 20 And Model 35, GM 7.5", 8.2", 8.5", 12P, 12T, C9.25 Rear Cover Bolt (Part No.33286)

    Dana 25, 27, 30, 44, Model 20 And Model 35, GM 7.5", 8.2", 8.5", 12P, 12T, C9.25 Rear Cover Bolt

    from

    $9.99
    5/16″-18 cover bolt, Dana Spicer 25, 27, 30 and 44, AMC Model 20 and Model 35, Chrysler 9.25 rear, GM 7.5″, 7.625″, 8.2″, 8.5″, 12 bolt passenger car and truck.

    Product Features:
    • Cover bolt for Dana Spicer 25, 27, 30 and 44, AMC Model 20 and Model 35, GM 7.5″, 7.625″, 8.2″, 8.5″ and 12 bolt passenger car and truck.
    • 1/2″ head
    See More

    Yukon Gear – Pinion Install Kit For Dana 60 Rear Differential (Part No.13032)

    Pinion Install Kit For Dana 60 Rear Differential

    from

    $295.99
    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 Dana Spicer 60 rear
    • Included are pinion bearings and races, pinion seal, crush sleeve , complete pinion shim kit, and marking compound with brush.
    See More

    Yukon Gear – Bearing Race Driver (Part No.56017)

    Bearing Race Driver

    from

    $215.99
    Bearing race driver. No return.

    Product Features:
    • Bearing race driver
    • Fits HM89410 race
    • All steel construction
    See More

    FAG US – Shaft Seal (Part No.SS2633)

    Shaft Seal

    from

    $28.99
    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.

    Product Features:
    • High-precision and High-quality components used in all KITs
    • Coverage of classic and new high-tech solutions for the best system coverage
    See More

    Popular 1973 GMC K15/K1500 Pickup Differentials Categories

    Most Popular Differential Bearings for 1973 GMC K15/K1500 Pickups

    Enhance your 1973 GMC K15/K1500 Pickup with one of the 10 Differential Bearings we have in stock, starting at just $6.99.

    National – Multi-Purpose Bearing (Part No.A-37)

    Multi-Purpose Bearing

    from

    $18.99
    Product Features:
    • CONSISTENT PERFORMANCE: Matched cup and cone components ensure consistent performance
    • PREMIUM MATERIALS: Precision manufactured using premium-grade steel for outstanding durability and performance
    • SMOOTH ROTATION: Crowned raceways and rollers for even load distribution
    • OE-STYLE DESIGN: Engineered to meet OE specifications
    • COMPREHENSIVE COVERAGE: Industry-leading coverage for domestic and import applications
    • RIGOROUS TESTING: Comprehensive testing throughout design and development processes by National engineers for quality you can count on
    See More

    National – Multi-Purpose Bearing (Part No.A-36)

    Multi-Purpose Bearing

    from

    $27.99
    Product Features:
    • CONSISTENT PERFORMANCE: Matched cup and cone components ensure consistent performance
    • PREMIUM MATERIALS: Precision manufactured using premium-grade steel for outstanding durability and performance
    • SMOOTH ROTATION: Crowned raceways and rollers for even load distribution
    • OE-STYLE DESIGN: Engineered to meet OE specifications
    • COMPREHENSIVE COVERAGE: Industry-leading coverage for domestic and import applications
    • RIGOROUS TESTING: Comprehensive testing throughout design and development processes by National engineers for quality you can count on
    See More

    National – Tapered Roller Bearing Cone (Part No.LM501349)

    Tapered Roller Bearing Cone

    from

    $19.99
    Manufactured with premium-grade steel, National taper bearing cones feature crowned raceways and rollers to ensure even load distribution.

    Product Features:
    • PREMIUM MATERIALS – Precision manufactured using premium-grade steel for outstanding durability and performance
    • SMOOTH ROTATION – Crowned raceways and rollers for even load distribution
    • OE-STYLE DESIGN – Engineered to meet OE specifications
    • COMPREHENSIVE COVERAGE – Industry-leading coverage for domestic and import applications
    • RIGOROUS TESTING – Comprehensive testing throughout design and development processes by National engineers for quality you can count on
    See More

    National – Bearing Race (Part No.LM501310)

    Bearing Race

    from

    $8.49
    Product Features:
    • PREMIUM MATERIALS: Precision manufactured using premium-grade steel for outstanding durability and performance
    • SMOOTH ROTATION: Crowned raceways for even load distribution
    • OE-STYLE DESIGN: Engineered to meet OE specifications
    • COMPREHENSIVE COVERAGE: Industry-leading coverage for domestic and import applications
    • RIGOROUS TESTING: Comprehensive testing throughout design and development processes by National engineers for quality you can count on
    See More

    Yukon Gear – Positraction Cross Pin Bolt For GM 12 Bolt Car And Truck (Part No.33344)

    Positraction Cross Pin Bolt For GM 12 Bolt Car And Truck

    from

    $28.99
    Positraction cross pin bolt for GM 12P and 12T.

    Product Features:
    • Cross pin bolt for GM 12 bolt passenger car and truck
    • For OEM positraction applications only
    See More

    FAG US – Bearing – TRB (Tapered Roller Bearing) (Part No.KT37)

    Bearing - TRB (Tapered Roller Bearing)

    from

    $28.49
    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.

    Product Features:
    • High-precision and High-quality components used in all KITs
    • Coverage of classic and new high-tech solutions for the best system coverage
    See More

    National – Bearing Race (Part No.25523)

    Bearing Race

    from

    $19.99
    Manufactured with premium-grade steel, National taper bearing cups feature crowned raceways to ensure even load distribution.

    Product Features:
    • PREMIUM MATERIALS – Precision manufactured using premium-grade steel for outstanding durability and performance
    • SMOOTH ROTATION – Crowned raceways for even load distribution
    • OE-STYLE DESIGN – Engineered to meet OE specifications
    • COMPREHENSIVE COVERAGE – Industry-leading coverage for domestic and import applications
    • RIGOROUS TESTING – Comprehensive testing throughout design and development processes by National engineers for quality you can count on
    See More

    FAG US – Cup (Part No.M88010)

    Cup

    from

    $11.29
    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.

    Product Features:
    • High-precision and High-quality components used in all KITs
    • Coverage of classic and new high-tech solutions for the best system coverage
    See More

    FAG US – Cup (Part No.LM501310)

    Cup

    from

    $9.99
    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.

    Product Features:
    • High-precision and High-quality components used in all KITs
    • Coverage of classic and new high-tech solutions for the best system coverage
    See More

    Yukon Gear – Cross Pin Bolt (Part No.33067)

    Cross Pin Bolt

    from

    $6.99
    Cross pin bolt for Chrysler 8.25″, 9.25″ rear, Ford 7.5″, 8.8″, GM 12 bolt car & truck, 7.2″ IFs, 7.5″, 7.6″, 8.0″, 8.25″ IFS & 8.5″.

    Product Features:
    • Cross pin bolt for Chrysler 8.25″ and 9.25″ rear, Ford 7.5″ and 8.8″, GM 12 botl car and truck, 8.5″, 8.25″ IFS, 8.0″, 7.625″, 7.5″ and 7.2″ IFS
    See More

    Best-Selling 1973 GMC K15/K1500 Pickup Differential Oil

    Upgrade your K15/K1500 Pickup with one of our 5 best-selling Differential Oil, earning an average 5 stars rating across 2 reviews.

    Valvoline – DEXRON – VI ATF Full Synthetic Automatic Transmission Fluid, 1 Quart (Part No.822405)

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

    from

    $14.49
    Valvoline DEXRON-VI/MERCON LV ATF is a full-synthetic transmission fluid formulated with advanced additive technology to meet and exceed the requirements of the General Motors DEXRON-VI specification. It is officially licensed and approved by GM and is fully back-serviceable and can be used wherever DEXRON-II and/or DEXRON-III are recommended. Recommended for use in the following applications: DEXRON-VI, DEXRON-III, DEXRON-II, and Allison C-4.

    Product Features:
    • Formulated with full-synthetic base stocks and advanced additive technology to meet the challenging demands of automatic transmissions
    • Enhanced anti-shudder protection for smooth shifting and maximum power transfer
    • Developed with anti-wear technology to help improve transmission durability
    • Engineered with a proprietary blend of base oils and advanced additives to provide better oil flow at low temperatures and greater film protection at higher temperatures
    See More

    Valvoline – DEX/MERC ATF Conventional Automatic Transmission Fluid, 1 Quart (Part No.798153)

    DEX/MERC ATF Conventional Automatic Transmission Fluid, 1 Quart

    from

    $11.99
    Valvoline DEX/MERC ATF is a high-quality transmission fluid formulated to meet the challenging demands of many automatic transmissions. Its responsive low-temperature fluidity is beneficial in both electronic and hydraulic controlled transmissions and transaxles. Recommended for use in the following applications: MERCON*, DEXRON*-III, Ford M2C138-CJ and M2C166-H, Allison C-4 and TES-389, and Caterpillar TO-2.

    Product Features:
    • Formulated with premium base stocks and advanced additive technology to meet the challenging demands of automatic transmissions
    • Enhanced anti-shudder protection for smooth shifting and maximum power transfer
    • Developed with anti-wear technology to help improve transmission durability
    • Engineered with a proprietary blend of base oils and advanced additives to provide better oil flow at low temperatures and greater film protection at higher temperatures
    See More

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

    Redline Synthetic "Shock Proof" Oil With Positraction Additive - 4 Quarts

    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
    See More

    Yukon Gear – Redline Synthetic "Shock Proof" Oil – 3 Quarts (Part No.15000)

    Redline Synthetic "Shock Proof" Oil - 3 Quarts

    from

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

    Product Features:
    • Includes three quarts of Redline Shockproof oil
    See More

    Yukon Gear – Redline Synthetic "Shock Proof" Oil – 4 Quarts (Part No.15004)

    Redline Synthetic "Shock Proof" Oil - 4 Quarts

    from

    $137.99
    Redline Synthetic “Shock Proof” Oil. 4 Quarts.

    Product Features:
    • Includes four quarts of Redline Shockproof oil
    See More

    Top-Quality Rear Differential Cover Gaskets for 1973 GMC K15/K1500 Pickups

    Choose a high-quality OEM or aftermarket Rear Differential Cover Gasket for GMC K15/K1500 Pickups and enjoy top-notch performance from $9.49.

    Felpro – Axle Housing Cover Gasket Irregular Shaped 12 Bolt Hole Gasket (Part No.RDS 13391)

    Axle Housing Cover Gasket Irregular Shaped 12 Bolt Hole Gasket

    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.

    Product Features:
    • Meets or exceeds all original equipment specifications
    • Application specific design to ensure a perfect fit
    • Engineered for the sealing repair environment
    • Validated for fit, form and function
    • Unsurpassed quality you can trust
    See More

    Pro-King – Differential Cover Gasket (Part No.742G303A)

    Differential Cover Gasket

    from

    $31.49
    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.
    See More

    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
    See More

    Yukon Gear – GM 12 Bolt Truck Cover Gasket (Part No.23015)

    GM 12 Bolt Truck Cover Gasket

    from

    $12.99
    12T cover gasket.

    Product Features:
    • Cover gasket
    • Fits GM 12 bolt truck
    See More

    Top Picks for 1973 GMC K15/K1500 Pickup Differential Covers

    Invest in one of our 6 durable Differential Covers for your 1973 GMC, knowing you’re getting trusted brands and expert craftsmanship.

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

    Replacement Chrome Cover For Dana 44

    from

    $67.99
    0.080″ thick Chrome replacement cover for Dana 44.

    Product Features:
    • Fits standard rotation Dana Spicer 44
    • Chrome
    See More

    Yukon Gear – Chrome Cover For GM 12 Bolt Truck (Part No.32012)

    Chrome Cover For GM 12 Bolt Truck

    from

    $64.99
    Chrome cover for GM 12T.

    Product Features:
    • Fits GM 12 bolt truck
    • Chrome
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    Yukon Gear – Steel Cover For Dana 44 Standard Rotation (Part No.32319)

    Steel Cover For Dana 44 Standard Rotation

    from

    $129.99
    Product Features:
    • Fits standard rotation Dana Spicer 44
    • Steel
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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

    from

    $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 – Differential (Part No.29101)

    Differential

    from

    $271.99
    Differential

    Yukon Gear – Polished Aluminum Cover For GM 12 Bolt Truck (Part No.32027)

    Polished Aluminum Cover For GM 12 Bolt Truck

    from

    $269.99
    Polished aluminum cover for 12T GM.

    Product Features:
    • Fits GM 12 bolt truck
    • Finned polished aluminum
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    Our Top-Rated Rear Housing Cover Gaskets for 1973 GMC K15/K1500 Pickups

    Make a smart move for your 1973 GMC K15/K1500 Pickup with our Rear Housing Cover Gasket for $7.99.

    Felpro – Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket (Part No.RDS 6629)

    Axle Housing Cover Gasket Irregular Shaped 10 Bolt Hole Gasket

    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.

    Product Features:
    • Meets or exceeds all original equipment specifications
    • Application specific design to ensure a perfect fit
    • Engineered for the sealing repair environment
    • Validated for fit, form and function
    • Unsurpassed quality you can trust
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    Top-Rated Differential Brands For Your 1973 GMC K15/K1500 Pickup

    When it comes to finding the perfect Differential for your 1973 GMC K15/K1500 Pickup, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 12 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 $7.99. Purchasing a Differential from us here at Advance Auto Parts is a smart move for both you and your 1973 GMC K15/K1500 Pickup, providing peace of mind with parts that meet or exceed OEM standards.

    Popular FELPRO 1973 GMC K15/K1500 Pickup Differentials

    If you’re looking for a top-quality Differential for your 1973 GMC K15/K1500 Pickup, 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 $7.99 and an average cost of $8.74, you’ll find the perfect Differential for your needs and budget. FELPRO Differentials for the 1973 GMC K15/K1500 Pickup come highly rated, with over 13 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.
    Axle Housing Cover Gasket Irregular Shaped 12 Bolt Hole Gasket
    from $9.49
    (3)
    Axle Housing Cover Gasket Irregular Shaped 12 Bolt Hole Gasket
    “felpro gaskets are great”

    Top-Quality National 1973 GMC K15/K1500 Pickup Differentials

    For those in search of a high-quality Differential for their 1973 GMC K15/K1500 Pickup, 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 $7.99, with an average price of $18.99, giving you a range of options to suit your budget. Backed by over 6 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.
    Bearing Race
    from $10.99
    (1)
    Bearing Race
    “Excellent quality and condition”
    Bearing Race
    from $7.99
    (4)
    Bearing Race
    “Goes with M88010 bearing cup. Application was the pinion bearing race for a Ford 9 Inch on a 1957 Ford F-100.”
    Shaft Repair Sleeve
    from $37.99
    (1)
    Shaft Repair Sleeve
    “Very delicate piece, but came shipped quite safely and not damaged. High quality.”

    FAQs for 1973 GMC K15/K1500 Pickup Differentials

    What are the best-selling Differentials for 1973 GMC K15/K1500 Pickups?

    Out of 331 Differentials that fit 1973 GMC K15/K1500 Pickups, the following parts are the top sellers:

    What’s the price range for 1973 GMC K15/K1500 Pickup Differentials?

    The prices of Differentials for the 1973 GMC K15/K1500 Pickup range from $0.91 up to $1,969.99 for the most premium parts.

    What is the average price of a Differential for a 1973 GMC K15/K1500 Pickup?

    The average price for Differentials for the 1973 GMC K15/K1500 Pickup is $242.91. 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 GMC K15/K1500 Pickup model years?

    Yes, we carry Differentials for 7 model years of GMC K15/K1500 Pickups between 1966 and 1974. The following model years are the most popular for Differential purchases: 1974, 1972, 1971, 1970, 1969, 1968, 1967, and 1966.

    What are the cheapest Differentials for my 1973 GMC K15/K1500 Pickup?

    The cheapest 1973 GMC K15/K1500 Pickup Differentials we carry are:

    Does Advance Auto Parts sell Differentials for any other 1973 GMC models?

    What types of Differentials do you sell for my 1973 GMC K15/K1500 Pickup?

    As of 11/2/25, these are some of the most in-demand types of Differentials for a 1973 GMC K15/K1500 Pickup:

    Can I get help with 1973 GMC K15/K1500 Pickup 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 K15/K1500 Pickup Differentials?

    Advance Auto Parts keeps returns simple. For new GMC K15/K1500 Pickup Differentials and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.