1977 Dodge Diplomat Differentials

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Keep Your 1977 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 1977 Dodge Diplomat looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Differential Bearings, Rear Housing 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 Motive Gear, National, and Felpro. For example, Motive Gear Differentials start at just $2.79 with an average 4.0 star rating. National and Felpro offer similar pricing and quality, backed by strong customer feedback. With over 174 reviews and a solid 4 star average, you can shop with confidence knowing other Dodge Diplomat owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1977 Dodge Diplomat Differential at Advance Auto Parts is around $210.73, with a range that starts at $2.79 and goes up to $1,034.99. With 166 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 1977 Dodge Diplomat in peak condition, inside and out.

Essential 1977 Dodge Diplomat Differentials

Dorman – Ring and Pinion Bearing Installation Kit (Part No.697-116)

Ring and Pinion Bearing Installation Kit

from

$178.99
This differential bearing kit includes all necessary installation components for a differential ring and pinion on certain vehicle years, makes and models.

Product Features:
  • Convenient kit – this ring and pinion bearing installation kit includes all necessary components for a complete repair on certain vehicle applications
  • Related repair – smart to have on hand when installing a differential ring and pinion
  • Durable construction – built for reliable longevity, free of defects in materials and workmanship
  • Trustworthy quality – backed by team of designers and engineers in the United States
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Yukon Gear – Ring Gear Bolt For Chrysler 9.25" Rear (Part No.33033)

Ring Gear Bolt For Chrysler 9.25" Rear

from

$9.99
Ring gear bolt for Chrysler 9.25″ rear, 7/16″ x 18.

Product Features:
  • Ring gear bolt for Chrysler 9.25″ rear
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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 – 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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Yukon Gear – Yoke for Chrysler 7.25" and 8.25" with A 7260 U/Joint Size (Part No.41003)

Yoke for Chrysler 7.25" and 8.25" with A 7260 U/Joint Size

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.

Product Features:
  • Fits Chrysler 7.25″ and 8.25″
  • 27 spline
  • 7260 u-joint size
  • Inside snap ring design
  • 2.125″ snap ring span
  • 1.078″ cap diameter
  • Strap style
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Motive Gear – Differential Gear Install Kit (Part No.C8.25IK)

Differential Gear Install Kit

from

$39.99
Product Features:
  • MINI INSTALL KIT CHRYSLER 8.25 8 1/4″
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Driveworks – Taper Bearing Cone (Part No.S-HM-88649)

Taper Bearing Cone

from

$19.49
Value-priced bearing meets all cataloged application requirements.

Product Features:
  • Brand may vary by location
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USA Standard Gear – Differential Spider Gear Kits (Part No.39002)

Differential Spider Gear Kits

from

$209.99
USA Standard Gear open spider gear set for Chrysler 8.25″, 27 spline .

Product Features:
  • Spider gear kit
  • Fits Chrysler 8.25″ 27 spline open differential
  • Includes two side gears, two pinion gears, cross pin shaft, cross pin bolt and spider gear thrust washers.
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Yukon Gear – Dana 44 and Chrysler 9.25" Tracloc Clutch Kit Replacement (Part No.16153)

Dana 44 and Chrysler 9.25" Tracloc Clutch Kit Replacement

from

$139.99
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 other general maintenance items. You can count on Yukon to fulfill all your differential small parts needs.

Product Features:
  • Clutch kit
  • Fits Dana Spicer 44 and Chrysler 9.25″ Trac Loc positraction
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Yukon Gear – Pinion Nut (Part No.33142)

Pinion Nut

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.

Product Features:
  • Pinion nut for Chrysler 8.0″ IFS, 8.25″, 8.75″ with 29 spline pinion and 9.25″ rear
  • 7/8″ x 14 thread
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Yukon Gear – 8.25" Chrysler Cover Gasket (Part No.23000)

8.25" Chrysler Cover Gasket

from

$12.99
8.25″ Chrysler cover gasket.

Product Features:
  • Cover gasket
  • Fits Chrysler 8.25″
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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 – Pinion Install Kit for Chrysler 9.25" Differential (Part No.13011)

Pinion Install Kit for Chrysler 9.25" Differential

from

$276.99
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.

Product Features:
  • Fits Chrysler 9.25″ rear
  • Included are pinion bearings and races, pinion seal, crush sleeve , complete pinion shim kit, and marking compound with brush.
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Yukon Gear – Bearing Race Driver for Popular Ford, Gm, Amc, Chrysler, and Dana Diffs (Part No.56022)

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

from

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

Product Features:
  • Fits M86610 race
  • All-steel construction
  • For accurate installation of bearing races
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Yukon Gear – Pinion Seal for 8.75" Chrysler Or for 9.25" Chrysler with 41 or 89 Housing (Part No.30121)

Pinion Seal for 8.75" Chrysler Or for 9.25" Chrysler with 41 or 89 Housing

from

$13.99
Yukon Mighty Seals use the latest design and manufacturing technologies to produce a precision fit that seals tight and lasts for years to come.

Product Features:
  • Pinion seal
  • Fits Chrysler 8.75″ with ’41’ and ’89’ case housings and 2000 and down Chrysler 9.25″
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Motive Gear – Differential Pinion Shim Kit (Part No.1104)

Differential Pinion Shim Kit

from

$12.99


Product Features:
  • KIT SHIM
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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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Yukon Gear – Dura Grip For Chrysler 9.25" Rear (Part No.26019)

Dura Grip For Chrysler 9.25" Rear

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.

Product Features:
  • Fits Chrysler 9.25″ rear
  • 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
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Dorman – Help – Differential Plug, Rubber (Part No.65293)

Differential Plug, Rubber

from

$7.99
This differential cover plug is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.

Product Features:
  • Direct replacement – this differential cover plug matches the fit and function of the factory part on specified years, makes and models
  • Ideal solution – this plug is a reliable replacement for an original part that is missing or has failed due to fatigue
  • Durable construction – this part is made from quality materials to ensure reliable performance and long service life
  • Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience
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Yukon Gear – Replacement Redi-Sleeve Yoke Saver, 8.75" C, 9.25" C, Dana 60/61/70/70U/70HD (Part No.30228)

Replacement Redi-Sleeve Yoke Saver, 8.75" C, 9.25" C, Dana 60/61/70/70U/70HD

from

$37.99
Yukon Mighty Seals use the latest design and manufacturing technologies to produce a precision fit that seals tight and lasts for years to come.

Product Features:
  • Redi-Sleeve yoke saver
  • Fits Chrysler 8.75″ and 9.25″ rear, Dana Spicer 60, 70, 70U and 70HD
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Yukon Gear – 9.25" Pinion Gear Thrust Washer (Part No.33274)

9.25" Pinion Gear Thrust Washer

from

$12.99
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 for Chrysler 9.25″ rear
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Yukon Gear – Cross Pin Shaft for Standard Open Chrysler 9.25" (Part No.33311)

Cross Pin Shaft for Standard Open Chrysler 9.25"

from

$46.99
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 shaft for Chrysler 9.25″
  • Fits standard open differentials only
  • 0.860″ diameter
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Yukon Gear – Steel Cover for Chrysler 8.25" (Part No.32312)

Steel Cover for Chrysler 8.25"

from

$159.99
These Yukon replacement diff covers are a direct bolt-on.

Product Features:
  • Fits Chrysler 8.25″
  • Steel
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Yukon Gear – High Performance Ring & Pinion Gear Set For Chrysler 8.25" In A 3.73 Ratio (Part No.24002)

High Performance Ring & Pinion Gear Set For Chrysler 8.25" In A 3.73 Ratio

from

$459.99
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 Chrysler 8.25″
  • 8.25″ ring gear diameter
  • 27 spline pinion
  • 10 ring gear bolts
  • 3.73 ratio
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Yukon Gear – Standard Open Notched Cross Pin Shaft for 9.25" Chrysler (Part No.33309)

Standard Open Notched Cross Pin Shaft for 9.25" Chrysler

from

$84.99
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 shaft
  • Fits Chrysler 9.25″
  • Standard open carrier only
  • Notched
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Yukon Gear – Bolt/Screw for Adjuster Lock for Chrysler 7.25", 8.25", 8.75", 9.25" (Part No.33233)

Bolt/Screw for Adjuster Lock for Chrysler 7.25", 8.25", 8.75", 9.25"

from

$15.99
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 lock bolt
  • Fits Chrysler 7.25″, 8.25″, 8.75″ and 9.25″
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Yukon Gear – Ltd. Slip Clutch Guide, Chry 9.25/Dana 44/50/GM 12 Bolt/8.2"/8.5"/8.6"/Nis M226 (Part No.33352)

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

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.

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
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Yukon Gear – Side Gear and Thrust Washer for 7.25" Chrysler (Part No.33279)

Side Gear and Thrust Washer for 7.25" Chrysler

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.

Product Features:
  • Side gear thrust washer kit
  • Fits Chrysler 7.25″
See More

Most Popular Differential Bearings for 1977 Dodge Diplomats

Enhance your 1977 Dodge Diplomat with one of the 6 Differential Bearings we have in stock, starting at just $6.99.

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

Yukon Gear – Model 35 (Standard Open & Tracloc) 8.25" Chrysler Tracloc Cross Pin Bolt (Part No.33230)

Model 35 (Standard Open & Tracloc) 8.25" Chrysler Tracloc Cross Pin Bolt

from

$13.99
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 AMC Model 35 with c-clip axles
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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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Schaeffler – Cup (Part No.M88010)

Cup

from

$10.99
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
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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Best-Selling 1977 Dodge Diplomat Rear Housing Cover Gaskets

Upgrade your Diplomat with one of our 3 best-selling Rear Housing Cover Gaskets, earning an average 4.5 stars rating across 34 reviews.

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

Axle Housing Cover Gasket Octagonal Shaped 12 Bolt Hole Gasket

from

$10.49
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

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

Axle Housing Cover Gasket

from

$10.29
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

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

Top-Quality Differential Covers for 1977 Dodge Diplomats

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

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

Steel Cover for Chrysler 8.25"

from

$159.99
These Yukon replacement diff covers are a direct bolt-on.

Product Features:
  • Fits Chrysler 8.25″
  • Steel
See More

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 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
See More

Top Picks for 1977 Dodge Diplomat Differential Oil

Invest in one of our 5 durable Differential Oil for your 1977 Dodge, knowing you’re getting trusted brands and expert craftsmanship.

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
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 Heavy Shockproof Gear Oil is formulated to provide lasting protection.

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 Heavy Shockproof Gear Oil is formulated to provide lasting protection.

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

Top-Rated Rear Differential Cover Gaskets for 1977 Dodge Diplomats

Make a smart move for your 1977 Dodge Diplomat with products all priced from $8.29 to $47.99.

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
See More

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 – 8.25" Chrysler Cover Gasket (Part No.23000)

8.25" Chrysler Cover Gasket

from

$12.99
8.25″ Chrysler cover gasket.

Product Features:
  • Cover gasket
  • Fits Chrysler 8.25″
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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
See More

Top-Rated Differential Brands For Your 1977 Dodge Diplomat

When it comes to finding the perfect Differential for your 1977 Dodge Diplomat, 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 $2.79. Purchasing a Differential from us here at Advance Auto Parts is a smart move for both you and your 1977 Dodge Diplomat, providing peace of mind with parts that meet or exceed OEM standards.

Popular Felpro 1977 Dodge Diplomat Differentials

If you’re looking for a top-quality Differential for your 1977 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 $9.39, you’ll find the perfect Differential for your needs and budget. Felpro Differentials for the 1977 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.
Axle Housing Cover Gasket: Oval Shaped 10 Bolt Hole Gasket
from $8.29
(21)
Axle Housing Cover Gasket: Oval Shaped 10 Bolt Hole Gasket
“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 National 1977 Dodge Diplomat Differentials

For those in search of a high-quality Differential for their 1977 Dodge Diplomat, 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 $17.99, with an average price of $23.99, giving you a range of options to suit your budget. Backed by over 15 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.
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.”
Tapered Roller Bearing Cone
from $25.99
(7)
Tapered Roller Bearing Cone
“Good price”

FAQs for 1977 Dodge Diplomat Differentials

What are the best-selling Differentials for 1977 Dodge Diplomats?

Out of 166 Differentials that fit 1977 Dodge Diplomats, the following parts are the top sellers:

What’s the price range for 1977 Dodge Diplomat Differentials?

The prices of Differentials for the 1977 Dodge Diplomat range from $2.79 up to $1,034.99 for the most premium parts.

What is the average price of a Differential for a 1977 Dodge Diplomat?

The average price for Differentials for the 1977 Dodge Diplomat is $210.73. 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 1978 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 1977 Dodge Diplomat?

The cheapest 1977 Dodge Diplomat Differentials we carry are:

Does Advance Auto Parts sell Differentials for any other 1977 Dodge models?

Yes. We stock Differentials for 17 other popular 1977 Dodge models. Some of the most popular are 1977 Charger Differentials, 1977 Ramcharger Differentials, 1977 W150 Differentials, 1977 Monaco Differentials, and 1977 D150 Differentials.

What are the top-rated Differentials that fit the 1977 Dodge Diplomat?

Based on 174 reviews by customers, our 1977 Dodge Diplomat Differentials have an average customer rating of 4 stars. These are the highest-rated categories of Differentials for the 1977 Dodge Diplomat and their top-rated products:

What types of Differentials do you sell for my 1977 Dodge Diplomat?

As of 6/2/26, these are some of the most in-demand types of Differentials for a 1977 Dodge Diplomat:

Can I get help with 1977 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.