1975 Plymouth Roadrunner Differentials

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Keep Your 1975 Plymouth Roadrunner in Top Shape with Quality Differentials

Whether you’re repairing or upgrading your Differential, using high-quality parts is key to keeping your 1975 Plymouth Roadrunner looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Rear Housing Cover Gaskets, Rear Differential Cover Gaskets, and Differential Covers. 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, Dorman, and Motive Gear. For example, National Differentials start at just $17.99 with an average 4.3 star rating. Dorman and Motive Gear offer similar pricing and quality, backed by strong customer feedback. With over 330 reviews and a solid 4 star average, you can shop with confidence knowing other Plymouth Roadrunner owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1975 Plymouth Roadrunner Differential at Advance Auto Parts is around $245.45, with a range that starts at $2.29 and goes up to $1,191.99. With 237 options in stock from 12 trusted brands, finding the right fit is easy. Popular picks like 3 Qt – 80W90 Conventional Gear Oil with Posi Additive, Tapered Roller Bearing Cone, and 3 Qt – Penzoil 80W90 Conventional Gear Oil start at just $25.99 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 1975 Plymouth Roadrunner in peak condition, inside and out.

Essential 1975 Plymouth Roadrunner Differentials

Yukon Gear – Replacement Baffle for Dana 60 & Dana 70-U (Part No.33001)

Replacement Baffle for Dana 60 & Dana 70-U

from

$6.99
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.

Product Features:
  • Oil baffle for Dana Spicer 60 and Dana Spicer 70U
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Yukon Gear – Bearing Race Driver for Chrysler 8.0", 8.75", and 9.25" Differentials (Part No.56021)

Bearing Race Driver for Chrysler 8.0", 8.75", and 9.25" Differentials

from

$188.99
Yukon Gear & Axle offers a full line of top quality differential tools to save time and money.

Product Features:
  • Fits M804010 race
  • All-steel construction
  • For accurate installation of bearing races
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Yukon Gear – Differential (Part No.26039)

Differential

from

$869.99
Differential

Powertrax – Grip LS Traction System (Part No.LS308229)

Grip LS Traction System

from

$505.99
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!
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Yukon Gear – 8.25" Chrysler Pinion Gear Thrust Washer (Part No.33273)

8.25" Chrysler Pinion Gear Thrust Washer

from

$26.99
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.

Product Features:
  • Pinion gear thrust washer
  • Fits Chrysler 8.25″
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USA Standard Gear – Differential Rebuild Kit (Part No.37002)

Differential Rebuild Kit

from

$267.99
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 2000 and down Chrysler 9.25″ rear
  • 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, thread locker, marking compound with brush and gasket.
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Yukon Gear – Steel Spool for Dana 60 with 35 Spline Axles, 4.56 & Up (Part No.32043)

Steel Spool for Dana 60 with 35 Spline Axles, 4.56 & Up

from

$414.99
Yukon Full Spools are a cost-effective way to convert a diff to 100% lockup. Installation is easy as they install in place of your differential carrier assembly. Each Yukon spool is made from high-quality 8620 steel and heat treated for additional strength. A spool is an outstanding choice for dedicated off-road and drag racing vehicles only.

Product Features:
  • Fits Chrysler Dana Spicer 60 with 35 spline axles
  • 4.56 and up ratio only
  • Provides 100% traction to both wheels at all times
  • Not recommended for street driven vehicles
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Yukon Gear – Carrier Installation Kit for Chrysler 9.25" Rear Differential (Part No.57001)

Carrier Installation Kit for Chrysler 9.25" Rear Differential

from

$173.99
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.

Product Features:
  • Fits Chrysler 9.25″ rear
  • Includes carrier bearings and races
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Yukon Gear – Replacement Outer Oil Slinger For Dana 60, 70, 70U & 70HD (Part No.33019)

Replacement Outer Oil Slinger For Dana 60, 70, 70U & 70HD

from

$5.99
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:
  • Outer oil slinger for Dana Spicer 60, 70, 70U and 70HD
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Yukon Gear – Roll Pin, Dana 50//60/70/80, 0.225" Dia, for X/P Shaft, 1.87" L (Part No.33327)

Roll Pin, Dana 50//60/70/80, 0.225" Dia, for X/P Shaft, 1.87" L

from

$7.99
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.

Product Features:
  • Roll pin for Dana Spicer 50, 60, 70, 70U, 70HD and 80
  • 0.225″ diameter
  • 1.870″ long
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Yukon Gear – Seal Housing for Dana 60, Zip Locker, with O-Rings (Part No.34039)

Seal Housing for Dana 60, Zip Locker, with O-Rings

from

$79.99
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.

Product Features:
  • Seal housing for Dana Spicer 60
  • Includes O-rings
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USA Standard Gear – Differential Cross Pin (Part No.17011)

Differential Cross Pin

from

$26.99
Spartan spring & pin kit, fits smaller designs.

Product Features:
  • Replacement spring and pin kit for Spartan Locker
  • Fits Dana 30, Dana 44, AMC Model 20, AMC Model 35, and Toyota designs
  • Includes 4 springs and 4 alignment pins
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Yukon Gear – Differential Side Bearing Screw Adjuster for 9.25" Chrysler (Part No.33256)

Differential Side Bearing Screw Adjuster for 9.25" Chrysler

from

$64.99
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.

Product Features:
  • Side adjuster for Chrysler 9.25″ rear
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Motive Gear – Differential Internal Carrier Gear Kit (Part No.C9.25BI)

Differential Internal Carrier Gear Kit

from

$168.99


Product Features:
  • C9.25 OPEN INTERNAL KIT, 1984-UP
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Yukon Gear – Dana 60 & Dana 70 Power Lok Case Bolt (Part No.33236)

Dana 60 & Dana 70 Power Lok Case Bolt

from

$7.99
Dana 60 & Dana 70 Power Lok case bolt.

Product Features:
  • Power Lok case bolt for Dana Spicer 60 and 70
  • 7/16 x 14 thread
  • 3.5″ long
  • 9/16″ hex head
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Yukon Gear – Differential Carrier Side Bearing Screw Adjuster for Chrysler 7.25" and 8.25" (Part No.33257)

Differential Carrier Side Bearing Screw Adjuster for Chrysler 7.25" and 8.25"

from

$42.99
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.

Product Features:
  • Side adjuster
  • Fits Chrysler 7.25″ and 8.25″
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Yukon Gear – Chrysler Fine Spline Pinion Nut for Chrysler 7.25", 8", 8.25", 8.75", and 9.25" (Part No.33253)

Chrysler Fine Spline Pinion Nut for Chrysler 7.25", 8", 8.25", 8.75", and 9.25"

from

$26.99
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.

Product Features:
  • Pinion nut
  • Fits Chrysler 7.25″, 8.0″, 8.25″, 9.25″ and 8.75″ with 29 spline pinion
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Richmond Gear – RngPnn (Part No.69-0047-1)

RngPnn

from

$342.99
RngPnn

Victor Reinz – Axle Housing Cover Gasket (Part No.71-14807-00)

Axle Housing Cover Gasket

from

$7.49
Product Features:
  • Choosing Victor Reinz assures getting OE quality parts in gaskets sets that have the coverage, contents, packaging and electronic cataloging to best meet the needs of the aftermarket.
  • Dana engineering-approved for fit, form and function
  • Meets or exceeds OE specifications
See More

Yukon Gear – Dana 60, Dana 70 & Dana 80 Cover Bolt (Part No.33235)

Dana 60, Dana 70 & Dana 80 Cover Bolt

from

$5.99
3/8″ cover bolt, Dana 60, Dana 70 & Dana 80.

Product Features:
  • Cover bolt for Dana Spicer 60, 70 and 80
  • 3/8″
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Yukon Gear – Replacement Cover Gasket For Dana 50, Dana 60 & Dana 70 (Part No.23007)

Replacement Cover Gasket For Dana 50, Dana 60 & Dana 70

from

$13.99
Yukon spider gear set for GM 8.2″ Dura Grip posi, 28 spline. This kit does not include clutches. This kit fits Yukon Dura Grip ONLY.

Product Features:
  • Cover gasket
  • Fits Dana Spicer 60, 70, 70U and 70HD
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USA Standard Gear – Differential Spider Gear Kits (Part No.39008)

Differential Spider Gear Kits

from

$198.99
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 Limited warranty against defects on their ring & pinion sets.

Product Features:
  • Spider gear kit
  • Fits Dana Spicer 60, 30 spline open differential
  • Includes two side gears, two pinion gears, cross pin shaft, roll pin and spider gear thrust washers.
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Motive Gear – Ring Gear Bolt (Part No.1304)

Ring Gear Bolt

from

$7.99


Product Features:
  • CHRY 8 3/4″ RING GEAR BOLTS C 8.25″
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National – Multi-Purpose Seal (Part No.6808N)

Multi-Purpose Seal

from

$15.99
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:
  • Design type: spring loaded; single-lip
  • Temperature range: -20 Deg. F to 300 Deg. F / -29 Deg. C to 49 Deg. C
  • Resistance to EP lubricants
  • Low swell in hydrocarbon fluids
  • Delivers quality and reliable performance for every type of repair
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Dorman – Differential Pinion Yoke Assembly (Part No.697-541)

Differential Pinion Yoke Assembly

from

$234.99
A worn or damaged differential pinion flange can lead to driveline Vibrations. And fluid leaks. This part is designed to match the performance of the original equipment pinion flange on specified vehicles. It has been engineered to help restore a secure and reliable connection between the differential pinion and the drive shaft when the original flange is rusted, worn or damaged. It is made of rugged materials for reliable service and durability.

Product Features:
  • Direct replacement – this differential pinion flange is designed to match the performance of the original equipment flange on specified vehicles
  • Ideal solution – engineered to help restore a secure and reliable connection between the differential pinion and the drive shaft when the original flange is worn or damaged
  • Durable construction – designed and manufactured to strict specifications for reliable performance
  • Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
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Valvoline – MaxLife Multi-Vehicle (ATF) Full Synthetic Automatic Transmission Fluid, 1 Quart (Part No.VV324)

MaxLife Multi-Vehicle (ATF) Full Synthetic Automatic Transmission Fluid, 1 Quart

from

$12.49
Valvoline Full Synthetic MaxLife Multi-Vehicle ATF, the No. 1 ATF product, suitable for use in 95% of vehicles. And now, it’s recommended for most belt & 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 & tear, and maximize performance. Has improved thermal stability for longer fluid life, better viscosity stability for consistent transmission operation, and frictional enhancements for smooth gear engagements. Valv MaxLife Multi-Vehicle ATF is suitable for most Ford, GM, Toyota, Honda, Nissan, Hyundai, Subaru, BMW, Mercedes, Volvo, VW & Audi vehicles. Recommended for use in: 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; Honda/Acura ATF-Z1 and Honda CVT; Nissan/Infiniti Matic-D, Matic-J, Matic-K and Matic-S; Hyundai/Kia SP-II, SP-III, SP-IV and SPH-IV; BMW 7045E, ETL 8072B, LA2634 and LT71141; Allison C-4; Mercedes-Benz NAG-1; Volvo 1161521, 1161540, 97340 and 1273.41; Subaru ATF HP, Lineartronic chain CVT and CVT-II, Lineartronic High Torque CVT, and CV-30; and VW/Audi G-052-025-A2 and G-052-162-A1. CURRENTLY UNABLE TO SHIP THIS PRODUCT TO CUSTOMERS LOCATED IN CALIFORNIA

Product Features:
  • FOR USE IN 95% OF VEHICLES INCLUDING MOST CVTs in operation with US registered light duty applications
  • HIGH PERFORMANCE CONDITIONING AGENTS prolong seal elasticity to prevent leaks
  • IMPROVED DURABILITY & TRANSMISSION LIFE with anti-wear technology to avoid costly repairs
  • ENHANCED HIGH & LOW TEMP PERFORMANCE supports transmission fluid in all weather situations
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Yukon Gear – 20 Long Air Line for Zip Locker (Part No.34002)

20 Long Air Line for Zip Locker

from

$29.99
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.

Product Features:
  • Air line
  • 20′ in length
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Powertrax – Differential Lock Assembly (Part No.1240-LR)

Differential Lock Assembly

from

$456.99
For vehicles that are driven daily, the Power Trax 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 Power Trax No-Slip locker easily installs in to your differential carrier using basic tools and without affecting your ring and pinion settings. Power Trax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Power Trax Grip-Pro and Grip-LS performance limited slips offer smooth dependable torque transfer and traction for the best of both worlds.

Product Features:
  • The Power Trax Lock-Right Locker provides outstanding traction for off-road machines and race vehicles. Power Trax No-Slip Traction Systems deliver excellent performance to street-driven cars and trucks.
  • Power Trax lockers range from the original, Lock-Right for serious straight-line performance, to the No-Slip traction system for street-able vehicles.
  • Power Trax 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.
  • Power Trax ia an Extreme Traction System
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Most Popular Rear Housing Cover Gasket for 1975 Plymouth Roadrunners

Enhance your 1975 Plymouth Roadrunner with this popular Rear Housing Cover Gasket we have in stock, for $7.49.

Victor Reinz – Axle Housing Cover Gasket (Part No.71-14807-00)

Axle Housing Cover Gasket

from

$7.49
Product Features:
  • Choosing Victor Reinz assures getting OE quality parts in gaskets sets that have the coverage, contents, packaging and electronic cataloging to best meet the needs of the aftermarket.
  • Dana engineering-approved for fit, form and function
  • Meets or exceeds OE specifications
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Best-Selling 1975 Plymouth Roadrunner Rear Differential Cover Gaskets

Upgrade your Roadrunner with one of our 3 best-selling Rear Differential Cover Gaskets, earning an average 4.5 stars rating across 21 reviews.

Felpro – Axle Housing Cover Gasket: Oval Shaped 10 Bolt Hole Gasket (Part No.RDS 55047)

Axle Housing Cover Gasket: Oval Shaped 10 Bolt Hole Gasket

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.

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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Spicer – Performance Differential Gasket – Chrysler 9.25 In. (Part No.RD52006)

Performance Differential Gasket - Chrysler 9.25 In.

from

$47.99
Spicer performance differential cover gaskets offer all-makes coverage for street, strip, drag, and off-road applications. These gaskets are reusable offering a clean release during replacement. Built with a mechanically and chemically bonder woven steel.

Product Features:
  • Made to adhere without messy RTV sealant This saves on install time by eliminating the time needed for RTV cure.
  • Provides no re-torque design with maximum compression and sealing.
  • Manufactured with proprietary high-density performance material.
  • Made in the USA.
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Yukon Gear – 9.25" Chrysler Rear Cover Gasket (Part No.23002)

9.25" Chrysler Rear Cover Gasket

from

$12.99
9.25″ Chrysler rear cover gasket.

Product Features:
  • Cover gasket
  • Fits Chrysler 9.25″ rear
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Top-Quality Differential Covers for 1975 Plymouth Roadrunners

Choose a high-quality OEM or aftermarket Differential Cover for Plymouth Roadrunners and enjoy top-notch performance from $73.99.

Yukon Gear – Chrome cover for Chrysler 9.25 (Part No.32001)

Chrome cover for Chrysler 9.25

from

$73.99
These Yukon replacement diff covers take your rig a step beyond the boring factory look. They are the stock OE design finished in chrome.

Product Features:
  • Fits Chrysler 9.25″ rear
  • Chrome
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Yukon Gear – Steel Cover for Dana 60 Standard Rotation (Part No.32321)

Steel Cover for Dana 60 Standard Rotation

from

$114.99
These Yukon replacement diff covers are a direct bolt-on.

Product Features:
  • Fits standard rotation Dana Spicer 60
  • Steel
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Yukon Gear – Steel Cover for Chrysler 9.25" Rear (Part No.32314)

Steel Cover for Chrysler 9.25" Rear

from

$93.99
These Yukon replacement diff covers are a direct bolt-on.

Product Features:
  • Fits Chrysler 9.25″ rear
  • Steel
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Yukon Gear – Standard Rotation Dana 60 Chrome Differential Cover (Part No.32005)

Standard Rotation Dana 60 Chrome Differential Cover

from

$89.99
Chrome replacement cover for Dana 60 and 61(not reverse rotation!).

Product Features:
  • Fits standard rotation Dana Spicer 60
  • Chrome
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Top Picks for 1975 Plymouth Roadrunner Differential Bearings

Invest in one of our 4 durable Differential Bearings for your 1975 Plymouth, knowing you’re getting trusted brands and expert craftsmanship.

National – Multi-Purpose Bearing (Part No.A-17)

Multi-Purpose Bearing

from

$17.99
Manufactured with premium-grade steel, National taper bearing sets feature crowned raceways and rollers to ensure even load distribution.

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

Multi-Purpose Bearing

from

$27.99
Manufactured with premium-grade steel, National taper bearing sets feature crowned raceways and rollers to ensure even load distribution.

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

Schaeffler – Cone (Part No.KL68149)

Cone

from

$12.99
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
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Yukon Gear – Cross Pin Bolt (Part No.33067)

Cross Pin Bolt

from

$6.99
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.

Product Features:
  • Cross pin bolt for Chrysler 8.25″ and 9.25″ rear, Ford 7.5″ and 8.8″, GM 12 bolt car and truck, 8.5″, 8.25″ IFS, 8.0″, 7.625″, 7.5″ and 7.2″ IFS
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Differential Oil for 1975 Plymouth Roadrunners

Make a smart move for your 1975 Plymouth Roadrunner with products all priced from $44.99 to $148.99.

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
Union 76 gear oil is a conventional non-synthetic 80W90 formulation designed for all types of differentials. This kit includes three quarts of oil and a bottle of Yukon Limited Slip Friction modifier that reduces noise and chatter in clutch driven positraction units and limited slip differentials.

Product Features:
  • Includes three quarts of conventional oil and one 4oz bottle of Yukon positraction additive
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Yukon Gear – 3 Qt – Penzoil 80W90 Conventional Gear Oil (Part No.15002)

3 Qt - Penzoil 80W90 Conventional Gear Oil

from

$44.99
Union 76 gear oil is a conventional non-synthetic 80W90 formulation designed for all types of differentials.

Product Features:
  • Includes three quarts of conventional oil
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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 Heavy Shockproof Gear Oil is formulated to provide lasting protection. This kit includes four quarts of oil and a bottle of Yukon Limited Slip Friction modifier that reduces noise and chatter in clutch driven positraction units and limited slip differentials.

Product Features:
  • Includes four quarts of Redline Shockproof oil and one 4oz bottle of Yukon positraction additive
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Yukon Gear – Redline Synthetic "Shock Proof" Oil – 3 Quarts (Part No.15000)

Redline Synthetic "Shock Proof" Oil - 3 Quarts

from

$99.99
Redline Heavy Shockproof Gear Oil is formulated to provide lasting protection.

Product Features:
  • Includes three quarts of Redline Shockproof oil
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Yukon Gear – Redline Synthetic "Shock Proof" Oil – 4 Quarts (Part No.15004)

Redline Synthetic "Shock Proof" Oil - 4 Quarts

from

$137.99
Redline Heavy Shockproof Gear Oil is formulated to provide lasting protection.

Product Features:
  • Includes four quarts of Redline Shockproof oil
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Top-Rated Differential Brands For Your 1975 Plymouth Roadrunner

When it comes to finding the perfect Differential for your 1975 Plymouth Roadrunner, 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 National, Dorman, and Motive Gear, and more, all known for their exceptional customer ratings (average brand rating of 4.3 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 1975 Plymouth Roadrunner, providing peace of mind with parts that meet or exceed OEM standards.

Popular National 1975 Plymouth Roadrunner Differentials

If you’re looking for a top-quality Differential for your 1975 Plymouth Roadrunner, Advance Auto Parts has exactly what you need with our selection of National Differentials. We have 3 National Differentials in stock for this fitment, all known for their durability and precision fit. With prices starting at just $17.99 and an average cost of $23.99, you’ll find the perfect Differential for your needs and budget. National Differentials for the 1975 Plymouth Roadrunner come highly rated, with over 15 customer reviews and an impressive average rating of 4.3 stars. Choosing a National Differential from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
Tapered Roller Bearing Cone
from $25.99
(7)
Tapered Roller Bearing Cone
“Good price”
Multi-Purpose Bearing
from $27.99
(1)
Multi-Purpose Bearing
“great price”
Multi-Purpose Bearing
from $17.99
(7)
Multi-Purpose Bearing
“Comparable with the Timkens I removed. NATIONAL bearings have lasted decades in many of my other machines.”

Top-Quality Dorman 1975 Plymouth Roadrunner Differentials

For those in search of a high-quality Differential for their 1975 Plymouth Roadrunner, Advance Auto Parts offers a great selection of Dorman Differentials. With 2 Dorman 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 $239.99, with an average price of $312.49, giving you a range of options to suit your budget. Backed by over 3 customer ratings and an average rating of 4.2 stars, Dorman Differentials provide both reliability and excellent performance. Choosing a Dorman Differential from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.
Ring and Pinion Bearing Installation Kit
from $239.99
(1)
Ring and Pinion Bearing Installation Kit
“This newly designed applicator works incredibly well. *Note that Nissan changed color code A15 from Red Brawn to Sparkle Red, but they are the same c”
Differential Ring and Pinion Set
from $384.99
(2)
Differential Ring and Pinion Set
“good”

FAQs for 1975 Plymouth Roadrunner Differentials

What are the best-selling Differentials for 1975 Plymouth Roadrunners?

Out of 237 Differentials that fit 1975 Plymouth Roadrunners, the following parts are the top sellers:

What’s the price range for 1975 Plymouth Roadrunner Differentials?

The prices of Differentials for the 1975 Plymouth Roadrunner range from $2.29 up to $1,191.99 for the most premium parts.

What is the average price of a Differential for a 1975 Plymouth Roadrunner?

The average price for Differentials for the 1975 Plymouth Roadrunner is $245.45. 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 Plymouth Roadrunner model years?

Yes, we carry Differentials for 6 model years of Plymouth Roadrunners between 1968 and 1974. The following model years are the most popular for Differential purchases: 1974, 1973, 1972, 1971, 1970, 1969, and 1968.

What are the cheapest Differentials for my 1975 Plymouth Roadrunner?

The cheapest 1975 Plymouth Roadrunner Differentials we carry are:

Does Advance Auto Parts sell Differentials for any other 1975 Plymouth models?

Yes. We stock Differentials for 8 other popular 1975 Plymouth models. Some of the most popular are 1975 Gran Fury Differentials, 1975 Trailduster Differentials, 1975 Fury Differentials, 1975 Duster Differentials, and 1975 Scamp Differentials.

What are the top-rated Differentials that fit the 1975 Plymouth Roadrunner?

The one 1975 Plymouth Roadrunner Differential we have in stock is the Differential Crush Sleeve. It costs $2.29.

What types of Differentials do you sell for my 1975 Plymouth Roadrunner?

As of 6/2/26, these are some of the most in-demand types of Differentials for a 1975 Plymouth Roadrunner:

Can I get help with 1975 Plymouth Roadrunner Differential orders?

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

What is your return policy for Plymouth Roadrunner Differentials?

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