1980 Dodge Diplomat Differentials

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Keep Your 1980 Dodge Diplomat in Top Shape with Quality Differentials

Whether you’re repairing or upgrading your Differential, using high-quality parts is key to keeping your 1980 Dodge Diplomat looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Rear Housing Cover Gaskets, 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 Motive Gear, Felpro, and Dorman. For example, Motive Gear Differentials start at just $2.99 with an average 4.1 star rating. Felpro and Dorman offer similar pricing and quality, backed by strong customer feedback. With over 803 reviews and a solid 3.4 star average, you can shop with confidence knowing other Dodge Diplomat owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1980 Dodge Diplomat Differential at Advance Auto Parts is around $215.25, with a range that starts at $2.99 and goes up to $1,034.99. With 157 options in stock from 13 trusted brands, finding the right fit is easy. Popular picks like Yukon Gear 3 Qt – Penzoil 80W90 Conventional Gear Oil, 15002, "Yukon Gear Ring Gear Bolt For Chrysler 9.25"" Rear, 33033", and National Tapered Roller Bearing Cone, HM88649 start at just $9.99 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 1980 Dodge Diplomat in peak condition, inside and out.

Essential 1980 Dodge Diplomat Differentials

Yukon Gear – "Yukon Gear Yoke for Chrysler 7.25"" and 8.25"" with A 7260 U/Joint Size, 41003" (Part No.41003)

"Yukon Gear Yoke for Chrysler 7.25"" and 8.25"" with A 7260 U/Joint Size, 41003"

from

$279.99
Yukon Gear and Axle manufactures a complete line of general replacement and performance series of pinion yokes for many street, racing, and heavy-duty off-road applications.
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Yukon Gear – "Yukon Gear 7.25"" & 8.25"" Chrysler Pinion Seal, 30189" (Part No.30189)

"Yukon Gear 7.25"" & 8.25"" Chrysler Pinion Seal, 30189"

from

$16.99
Yukon Mighty Seals use the latest design and manufacturing technologies to produce a precision fit that seals tight and lasts for years to come.
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National – National Bearing Race, JLM704610 (Part No.JLM704610)

National Bearing Race, JLM704610

from

$13.99
Manufactured with premium-grade steel, National taper bearing cups feature crowned raceways to ensure even load distribution.
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USA Standard Gear – USA Standard Gear Differential Rebuild Kit, 60020 (Part No.60020)

USA Standard Gear Differential Rebuild Kit, 60020

from

$159.99
“Yukon yoke for GM 12 bolt car & truck, 1330 u/joint size. 3.625″” snap ring span, 1.062″” cap diameter. Outside snap ring. All Yukon yokes come with a Limited warranty against manufacturing defects.”
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Yukon Gear – "Yukon Gear Pinion Install Kit for Chrysler 7.25"" Differential, 13001" (Part No.13001)

"Yukon Gear Pinion Install Kit for Chrysler 7.25"" Differential, 13001"

from

$223.99
Yukon Pinion Installation Kits are a terrific solution for gear installation on lower mileage vehicles where the carrier bearings and races can be reused. This kit features Timken bearings and races along with high-quality seals and small parts. Yukon does extensive research for each application to make sure your kit will arrive with all the correct parts you need to install your gear set.
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Yukon Gear – "Yukon Gear Chrysler 9.25"" and Dana 44 / 60 Tracloc Clutch Guide Replacement, 33249" (Part No.33249)

"Yukon Gear Chrysler 9.25"" and Dana 44 / 60 Tracloc Clutch Guide Replacement, 33249"

from

$8.99
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.
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Yukon Gear – "Yukon Gear Positraction Spiders for Chrysler 9.25"" Dura Grip, 31 Spline, No Clutches, 16180" (Part No.16180)

"Yukon Gear Positraction Spiders for Chrysler 9.25"" Dura Grip, 31 Spline, No Clutches, 16180"

from

$389.99
Yukon Gear & Axle spider gear kits utilize the highest quality materials and best production techniques in the industry to ensure a longer lasting spider gear set. Kit delivers everything needed for a complete and proper spider gear set replacement.
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Yukon Gear – Yukon Gear Pinion Nut, 33142 (Part No.33142)

Yukon Gear Pinion Nut, 33142

from

$10.99
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.
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Yukon Gear – "Yukon Gear Replacement Pinion Depth Shims for Dana 35, Model 35 & Chrysler 7.25"", 55014" (Part No.55014)

"Yukon Gear Replacement Pinion Depth Shims for Dana 35, Model 35 & Chrysler 7.25"", 55014"

from

$17.99
Yukon shim kits are precision machined and tailored for each individual application to ensure you have the right shims for every set up.
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Yukon Gear – "Yukon Gear Crush Sleeve Eliminator Kit for GM 8.5"" & Chrysler 9.25"", 55048" (Part No.55048)

"Yukon Gear Crush Sleeve Eliminator Kit for GM 8.5"" & Chrysler 9.25"", 55048"

from

$57.99
Yukon shim kits are precision machined and tailored for each individual application to ensure you have the right shims for every set up.
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Yukon Gear – "Yukon Gear Dura Grip For Chrysler 9.25"" Rear, 26019" (Part No.26019)

"Yukon Gear Dura Grip For Chrysler 9.25"" Rear, 26019"

from

$829.99
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.
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Felpro – Felpro Axle Housing Cover Gasket: Oval Shaped 10 Bolt Hole Gasket, RDS 55047 (Part No.RDS 55047)

Felpro Axle Housing Cover Gasket: Oval Shaped 10 Bolt Hole Gasket, RDS 55047

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.
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B & M – "B & M Cast Aluminum Differential Cover For Chrysler 9.25"", 10306" (Part No.10306)

"B & M Cast Aluminum Differential Cover For Chrysler 9.25"", 10306"

from

$311.99
Our engineers designed the line of Hi-Tek differential covers to not only look good but address a number of weaknesses of the factory-stamped steel covers. First, they started by constructing the covers of thick A356.0-T6 aluminum, which dissipates heat much faster than the factory steel unit keeping the fluid temperature lower under high-stress loads vs. a steel cover. Then for added durability, we added a reinforced center bar for extra strength along with load bolts to help prevent bearing cap deflection under severe loads. The internal shape of the cover retains the smooth round back internally to help keep the fluid flow going over the ring gear to properly lubricate and cool the bearings and ring & pinion gears. Additional features include a magnetic drain plug for catching ferrous metal particles, a machined B&M logo, and all necessary hardware and easy-to-follow detailed instructions for a quick and simple installation you can do at home.
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Yukon Gear – "Yukon Gear High Performance Ring & Pinion Gear Set For ’09 & Down Chrysler 9.25"" In A 3.21 Ratio, 24012" (Part No.24012)

"Yukon Gear High Performance Ring & Pinion Gear Set For '09 & Down Chrysler 9.25"" In A 3.21 Ratio, 24012"

from

$529.99
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 has an updated, proprietary, design that provides longer life and higher durability than the competition. 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. We reccomend an OEM gear for van applications. This gear set is for ’09 and older applications only.
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Yukon Gear – Yukon Gear Side Gear Thrust Washers, 33277 (Part No.33277)

Yukon Gear Side Gear Thrust Washers, 33277

from

$218.99
“Side gear thrust washer kit for 8.25″” Chrysler, 27 spline only.”
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Dorman – Dorman Differential Pinion Yoke Assembly, 697-541 (Part No.697-541)

Dorman Differential Pinion Yoke Assembly, 697-541

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.
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Yukon Gear – "Yukon Gear Ltd. Slip Clutch Guide, Chry 9.25/Dana 44/50/GM 12 Bolt/8.2""/8.5""/8.6""/Nis M226, 33352" (Part No.33352)

"Yukon Gear Ltd. Slip Clutch Guide, Chry 9.25/Dana 44/50/GM 12 Bolt/8.2""/8.5""/8.6""/Nis M226, 33352"

from

$8.99
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.
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Driveworks – Driveworks Taper Bearing Cone, S-HM-88649 (Part No.S-HM-88649)

Driveworks Taper Bearing Cone, S-HM-88649

from

$19.49
Value-priced bearing meets all cataloged application requirements.
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Yukon Gear – "Yukon Gear Differential Side Bearing Screw Adjuster for 9.25"" Chrysler, 33256" (Part No.33256)

"Yukon Gear Differential Side Bearing Screw Adjuster for 9.25"" Chrysler, 33256"

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.
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Yukon Gear – "Yukon Gear Standard Open Carrier Case For Chrysler 8.25"", 29 Spline, 2.56 & Up, 1997 & Up Only, 20011" (Part No.20011)

"Yukon Gear Standard Open Carrier Case For Chrysler 8.25"", 29 Spline, 2.56 & Up, 1997 & Up Only, 20011"

from

$634.99
“Right hand adjuster lock for 9.25″” GM IFS.”
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Driveworks – Driveworks Taper Bearing Set, S-A-17 (Part No.S-A-17)

Driveworks Taper Bearing Set, S-A-17

from

$12.49
Value-priced bearing meets all cataloged application requirements.
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Motive Gear – Motive Gear Differential Gear Install Kit, C8.25IK (Part No.C8.25IK)

Motive Gear Differential Gear Install Kit, C8.25IK

from

$39.99
Motive Gear Differential Gear Install Kit, C8.25IK.
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Yukon Gear – Yukon Gear Bearing Race Driver for Popular Ford, Gm, Amc, Chrysler, and Dana Diffs, 56022 (Part No.56022)

Yukon Gear Bearing Race Driver for Popular Ford, Gm, Amc, Chrysler, and Dana Diffs, 56022

from

$188.99
Yukon Gear & Axle offers a full line of top quality differential tools to save time and money.
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USA Standard Gear – USA Standard Gear Differential Open Unit/Component, 17038 (Part No.17038)

USA Standard Gear Differential Open Unit/Component, 17038

from

$799.99
The Spartan Locker, by USA Standard Gear, provides reliable traction at a low cost. Give your vehicle great traction and save some cash. Choose a Spartan Locker for better traction. The Spartan locker by USA standard gear is a mechanical locker that replaces the spiders in a standard case. The Spartan locker’s design does not use the thrust washers and has a revolutionary spring and pin design that makes installation a snap! The couplers and drivers are made from 9310 steel, for added strength. Each Spartan locker carries a Limited warranty against defect.
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Yukon Gear – "Yukon Gear Side Gear and Thrust Washer for 7.25"" Chrysler, 33279" (Part No.33279)

"Yukon Gear Side Gear and Thrust Washer for 7.25"" Chrysler, 33279"

from

$69.99
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.
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Yukon Gear – "Yukon Gear Redline Synthetic ""Shock Proof"" Oil – 4 Quarts, 15004" (Part No.15004)

"Yukon Gear Redline Synthetic ""Shock Proof"" Oil - 4 Quarts, 15004"

from

$137.99
Redline Heavy Shockproof Gear Oil is formulated to provide lasting protection.
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Yukon Gear – "Yukon Gear Standard Open Spider Gear Kit for 9.25"" Chrysler with 31 Spline Axles, 16004" (Part No.16004)

"Yukon Gear Standard Open Spider Gear Kit for 9.25"" Chrysler with 31 Spline Axles, 16004"

from

$333.99
Yukon Gear & Axle spider gear kits feature higher quality materials and better manufacturing techniques than OEM to ensure a longer lasting spider gear set. Kit delivers everything needed for a complete and proper spider gear set replacement.
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USA Standard Gear – USA Standard Gear Differential Cross Pin, 17035 (Part No.17035)

USA Standard Gear Differential Cross Pin, 17035

from

$49.99
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.
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Most Popular Rear Housing Cover Gaskets for 1980 Dodge Diplomats

Enhance your 1980 Dodge Diplomat with one of the 3 Rear Housing Cover Gaskets we have in stock, starting at just $7.49.

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

Felpro Axle Housing Cover Gasket: Oval Shaped 10 Bolt Hole Gasket, RDS 55047

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.
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Victor Reinz – Victor Reinz Axle Housing Cover Gasket, 71-14836-00 (Part No.71-14836-00)

Victor Reinz Axle Housing Cover Gasket, 71-14836-00

from

$10.29
With Victor Reinz gaskets, you can be sure you are getting sealing solutions that deliver OE quality gasket technology and engineering. That is because Victor Reinz is an original equipment supplier and the trusted choice of manufacturers the world over, offering broad coverage for foreign and domestic cars and trucks. In Victor Reinz gasket sets, you get the right combination of components needed for fast, long-lasting repairs.
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Victor Reinz – Victor Reinz Axle Housing Cover Gasket, 71-14807-00 (Part No.71-14807-00)

Victor Reinz Axle Housing Cover Gasket, 71-14807-00

from

$7.49
With Victor Reinz gaskets, you can be sure you are getting sealing solutions that deliver OE quality gasket technology and engineering. That is because Victor Reinz is an original equipment supplier and the trusted choice of manufacturers the world over, offering broad coverage for foreign and domestic cars and trucks. In Victor Reinz gasket sets, you get the right combination of components needed for fast, long-lasting repairs.
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Best-Selling 1980 Dodge Diplomat Differential Oil

Upgrade your Diplomat with one of our 2 best-selling Differential Oil.

Yukon Gear – Yukon Gear 3 Qt – Penzoil 80W90 Conventional Gear Oil, 15002 (Part No.15002)

Yukon Gear 3 Qt - Penzoil 80W90 Conventional Gear Oil, 15002

from

$44.99
Union 76 gear oil is a conventional non-synthetic 80W90 formulation designed for all types of differentials.
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Yukon Gear – "Yukon Gear Redline Synthetic ""Shock Proof"" Oil – 4 Quarts, 15004" (Part No.15004)

"Yukon Gear Redline Synthetic ""Shock Proof"" Oil - 4 Quarts, 15004"

from

$137.99
Redline Heavy Shockproof Gear Oil is formulated to provide lasting protection.
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Top-Quality Rear Differential Cover Gaskets for 1980 Dodge Diplomats

Choose a high-quality OEM or aftermarket Rear Differential Cover Gasket for Dodge Diplomats and enjoy top-notch performance from $11.49.

Felpro – Felpro Axle Housing Cover Gasket Octagonal Shaped 12 Bolt Hole Gasket, RDS 55073 (Part No.RDS 55073)

Felpro Axle Housing Cover Gasket Octagonal Shaped 12 Bolt Hole Gasket, RDS 55073

from

$11.49
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.
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Our Top Pick for a 1980 Dodge Diplomat Differential Carrier Bearing Set

Invest in a durable Differential Carrier Bearing Set for your 1980 Dodge, knowing you’re getting trusted brands and expert craftsmanship.

Driveworks – Driveworks Taper Bearing Set, S-A-17 (Part No.S-A-17)

Driveworks Taper Bearing Set, S-A-17

from

$12.49
Value-priced bearing meets all cataloged application requirements.
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Differential Covers for 1980 Dodge Diplomats

Make a smart move for your 1980 Dodge Diplomat with products all priced from $73.99 to $311.99.

Yukon Gear – "Yukon Gear Steel Cover for Chrysler 8.25"", 32312" (Part No.32312)

"Yukon Gear Steel Cover for Chrysler 8.25"", 32312"

from

$159.99
These Yukon replacement diff covers are a direct bolt-on.
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Yukon Gear – Yukon Gear Chrome cover for Chrysler 9.25, 32001 (Part No.32001)

Yukon Gear Chrome cover for Chrysler 9.25, 32001

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.
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B & M – "B & M Cast Aluminum Differential Cover For Chrysler 9.25"", 10306" (Part No.10306)

"B & M Cast Aluminum Differential Cover For Chrysler 9.25"", 10306"

from

$311.99
Our engineers designed the line of Hi-Tek differential covers to not only look good but address a number of weaknesses of the factory-stamped steel covers. First, they started by constructing the covers of thick A356.0-T6 aluminum, which dissipates heat much faster than the factory steel unit keeping the fluid temperature lower under high-stress loads vs. a steel cover. Then for added durability, we added a reinforced center bar for extra strength along with load bolts to help prevent bearing cap deflection under severe loads. The internal shape of the cover retains the smooth round back internally to help keep the fluid flow going over the ring gear to properly lubricate and cool the bearings and ring & pinion gears. Additional features include a magnetic drain plug for catching ferrous metal particles, a machined B&M logo, and all necessary hardware and easy-to-follow detailed instructions for a quick and simple installation you can do at home.
See More

Yukon Gear – "Yukon Gear Steel Cover for Chrysler 9.25"" Rear, 32314" (Part No.32314)

"Yukon Gear Steel Cover for Chrysler 9.25"" Rear, 32314"

from

$93.99
These Yukon replacement diff covers are a direct bolt-on.
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Top-Rated Differential Brands For Your 1980 Dodge Diplomat

When it comes to finding the perfect Differential for your 1980 Dodge Diplomat, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 13 trusted brands. We carry the most popular Differential brands including Felpro, Dorman, 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 $2.99. Purchasing a Differential from us here at Advance Auto Parts is a smart move for both you and your 1980 Dodge Diplomat, providing peace of mind with parts that meet or exceed OEM standards.

Popular Felpro 1980 Dodge Diplomat Differentials

If you’re looking for a top-quality Differential for your 1980 Dodge Diplomat, 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 $8.29 and an average cost of $9.89, you’ll find the perfect Differential for your needs and budget. Felpro Differentials for the 1980 Dodge Diplomat come highly rated, with over 55 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.
Felpro Axle Housing Cover Gasket: Oval Shaped 10 Bolt Hole Gasket, RDS 55047
from $8.29
(21)
Felpro Axle Housing Cover Gasket: Oval Shaped 10 Bolt Hole Gasket, RDS 55047
“I always use Fel-Pro gaskets they’re the best, but this gasket to replace the differential gasket on my son’s Jeep when I did a fluid change work and ”

Top-Quality Dorman 1980 Dodge Diplomat Differentials

For those in search of a high-quality Differential for their 1980 Dodge Diplomat, Advance Auto Parts offers a great selection of Dorman Differentials. With 1 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 $384.99, giving you a range of options to suit your budget. Backed by over 2 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.

FAQs for 1980 Dodge Diplomat Differentials

What are the best-selling Differentials for 1980 Dodge Diplomats?

Out of 157 Differentials that fit 1980 Dodge Diplomats, the following parts are the top sellers:

What’s the price range for 1980 Dodge Diplomat Differentials?

The prices of Differentials for the 1980 Dodge Diplomat range from $2.99 up to $1,034.99 for the most premium parts.

What is the average price of a Differential for a 1980 Dodge Diplomat?

The average price for Differentials for the 1980 Dodge Diplomat is $215.25. 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 Dodge Diplomat model years?

Yes, we carry Differentials for 11 model years of Dodge Diplomats between 1977 and 1989. The following model years are the most popular for Differential purchases: 1989, 1988, 1987, 1986, 1985, 1984, 1983, 1982, and 1981.

What are the cheapest Differentials for my 1980 Dodge Diplomat?

Does Advance Auto Parts sell Differentials for any other 1980 Dodge models?

Yes. We stock Differentials for 20 other popular 1980 Dodge models. Some of the most popular are 1980 Challenger Differentials, 1980 Ramcharger Differentials, 1980 W150 Differentials, 1980 D150 Differentials, and 1980 Colt Differentials.

What types of Differentials do you sell for my 1980 Dodge Diplomat?

As of 8/2/26, these are some of the most in-demand types of Differentials for a 1980 Dodge Diplomat:

Can I get help with 1980 Dodge Diplomat Differential orders?

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

What is your return policy for Dodge Diplomat Differentials?

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