1984 Mercury Cougar Differentials

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Keep Your 1984 Mercury Cougar in Top Shape with Quality Differentials

Whether you’re repairing or upgrading your Differential, using high-quality parts is key to keeping your 1984 Mercury Cougar looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Differential Carrier Bearing Set, Differential Covers, and Differential Pinion Seals. 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 Driveworks, Motive Gear, and National. For example, Driveworks Differentials start at just $11.99 with an average 4.2 star rating. Motive Gear and National offer similar pricing and quality, backed by strong customer feedback. With over 159 reviews and a solid 4.5 star average, you can shop with confidence knowing other Mercury Cougar owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1984 Mercury Cougar Differential at Advance Auto Parts is around $217.87, with a range that starts at $1.29 and goes up to $1,115.99. With 149 options in stock from 16 trusted brands, finding the right fit is easy. Popular picks like Dorman – Help Differential Shaft Lock Bolt, 81048, Yukon Gear 3 Qt – Penzoil 80W90 Conventional Gear Oil, 15002, and Felpro Axle Housing Cover Gasket Oval Shaped 10 Bolt Hole Gasket, RDS 55393 start at just $6.79 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 1984 Mercury Cougar in peak condition, inside and out.

Essential 1984 Mercury Cougar Differentials

Yukon Gear – "Yukon Gear 18 Plate Carbon Clutches, GM 8.2""/GM 8.5""/12T/12P/Ford 8.8""/Cast Iron Vette, 16110" (Part No.16110)

"Yukon Gear 18 Plate Carbon Clutches, GM 8.2""/GM 8.5""/12T/12P/Ford 8.8""/Cast Iron Vette, 16110"

from

$483.99
Yukon Gear & Axle clutch kits fit popular GM diffs outfitted with a Yukon Dura Grip positraction unit feature 18 steel clutch plates, ensuring total traction and long-lasting performance.
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Yukon Gear – "Yukon Gear Ford 8"" & 9"" Tracloc Ring Gear Bolt, 33044" (Part No.33044)

"Yukon Gear Ford 8"" & 9"" Tracloc Ring Gear Bolt, 33044"

from

$4.99
“Ford 8″” & 9″” TracLoc ring gear bolt, 1-1/4″” long.”
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Yukon Gear – "Yukon Gear High Performance Ring & Pinion Gear Set For Ford 9"" In A 3.89 Ratio, 24107" (Part No.24107)

"Yukon Gear High Performance Ring & Pinion Gear Set For Ford 9"" In A 3.89 Ratio, 24107"

from

$404.99
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.
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Yukon Gear – "Yukon Gear 9"" Ford Pinion Nut, 35 Spline Large Pinion Oversize, 33161" (Part No.33161)

"Yukon Gear 9"" Ford Pinion Nut, 35 Spline Large Pinion Oversize, 33161"

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.
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Dorman – Dorman Differential Clutch Kit, 697-780 (Part No.697-780)

Dorman Differential Clutch Kit, 697-780

from

$262.99
This differential disc kit is a low-cost, time-saving repair solution for the posi-traction function. They are designed to match the fit and performance of the original disc on specific vehicle years, makes and models.
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Yukon Gear – "Yukon Gear Chrome Cover for 8.8"" Ford, 32009" (Part No.32009)

"Yukon Gear Chrome Cover for 8.8"" Ford, 32009"

from

$74.99
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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Yukon Gear – "Yukon Gear Side Gear with Hub for 8"" and 9"" Ford with 28 Splines, 16163" (Part No.16163)

"Yukon Gear Side Gear with Hub for 8"" and 9"" Ford with 28 Splines, 16163"

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 other general maintenance items. You can count on Yukon to fulfill all your differential small parts needs.
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Yukon Gear – "Yukon Gear Master Overhaul Kit For Ford 9"" LM104911 Differential, 35 Spline Pinion, 14063" (Part No.14063)

"Yukon Gear Master Overhaul Kit For Ford 9"" LM104911 Differential, 35 Spline Pinion, 14063"

from

$544.99
Yukon Master Overhaul kits give you all the high quality parts you need to start & finish every differential job. Yukon offers more tailor-made kits than any other manufacturer in the industry to meet your specific installation needs. This kit uses Timken bearings and races along with high quality seals and small parts. Included in this kit 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), Thread locking compound, marking compound with brush, and gasket. Yukon’s Master Overhaul kits are the most comprehensive and complete kits on the market. They do extensive research to ensure that every kit is specially tailored to your application.
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USA Standard Gear – USA Standard Gear Differential Cross Pin, 17022 (Part No.17022)

USA Standard Gear Differential Cross Pin, 17022

from

$26.99
“9”” Ford Spartan locker cross pin, short.”
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Yukon Gear – Yukon Gear Crush Sleeve, 33093 (Part No.33093)

Yukon Gear Crush Sleeve, 33093

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 Cover Bolt For Ford 7.5"", 8.8"" & 9.75"", 33554" (Part No.33554)

"Yukon Gear Cover Bolt For Ford 7.5"", 8.8"" & 9.75"", 33554"

from

$6.99
“Yukon 1541H alloy replacement rear axle for Dana 60, 70, and 80, 35 spline. (40″” to 43.5″”) Full float axle (8×3.96″” ). Yukon 1541H alloy axles offer a strength increase over stock while retaining a low cost. Yukon 1541H alloy rear axles come with a one year warranty against manufacturing defects. This is a full-floating axle.”
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USA Standard Gear – "USA Standard Gear Spartan Locker For Ford 9"", 28 Or 31 Spline, 17042" (Part No.17042)

"USA Standard Gear Spartan Locker For Ford 9"", 28 Or 31 Spline, 17042"

from

$579.99
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 are made from 9310 steel, for added strength. Each Spartan locker carries a one year warranty against defect. This unit uses the factory side gears.
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Yukon Gear – "Yukon Gear Preload Shim Kit for Chrysler 8.75"" & Ford 9"", 55030" (Part No.55030)

"Yukon Gear Preload Shim Kit for Chrysler 8.75"" & Ford 9"", 55030"

from

$21.99
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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Sealed Power – Sealed Power Engine Auxiliary Shaft Bearing Set, 1460M (Part No.1460M)

Sealed Power Engine Auxiliary Shaft Bearing Set, 1460M

from

$23.99
Sealed Power parts provide innovative designs, use leading-edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
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Yukon Gear – "Yukon Gear Trac Loc Spring Plate for Ford 9"" & 8, 33517" (Part No.33517)

"Yukon Gear Trac Loc Spring Plate for Ford 9"" & 8, 33517"

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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Powertrax – Powertrax Grip LS Traction System, LS109031 (Part No.LS109031)

Powertrax Grip LS Traction System, LS109031

from

$451.99
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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National – National Multi-Purpose Seal, 51098 (Part No.51098)

National Multi-Purpose Seal, 51098

from

$10.99
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.
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Royal Purple – Royal Purple MaxGear SAE 75W140 High Performance Gear Oil w/Friction Modifier Additive, 1 QT, 01301 (Part No.01301)

Royal Purple MaxGear SAE 75W140 High Performance Gear Oil w/Friction Modifier Additive, 1 QT, 01301

from

$28.49
Max Gear is recommended for truck and automotive differentials, outboard motor lower units or in rear axles or manual transmissions requiring an API fluid. Max Gear is a high performance automotive gear oil designed to provide maximum protection to heavily loaded gears while increasing power throughput through the drive train. Max Gear virtually eliminates both gear and bearing wear-even under severe squeeze film conditions caused by extremely high loads, sudden shock loads or low RPMs. Slippery, synthetic molecules not only reduce wear and friction but significantly increase Max Gear’s cold weather fluidity and lubricity, making it the ideal choice for vehicles operating in cold climates. Gears run smoother, quieter, cooler and longer without overhauls. It is noncorrosive to both ferrous and nonferrous metals.
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Yukon Gear – "Yukon Gear Carrier Installation Kit for Ford 8.8"" Differential, 57007" (Part No.57007)

"Yukon Gear Carrier Installation Kit for Ford 8.8"" Differential, 57007"

from

$134.99
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.
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Motive Gear – Motive Gear Differential Gear Install Kit, F7.5IK (Part No.F7.5IK)

Motive Gear Differential Gear Install Kit, F7.5IK

from

$35.49
Motive Gear Differential Gear Install Kit, F7.5IK.
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Yukon Gear – "Yukon Gear Side Gear and Thrust Washer (0.750"" Shaft) for 8.8"" Ford, 33298" (Part No.33298)

"Yukon Gear Side Gear and Thrust Washer (0.750"" Shaft) for 8.8"" Ford, 33298"

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.
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Powertrax – Powertrax Grip PRO Traction System, GT109035 (Part No.GT109035)

Powertrax Grip PRO Traction System, GT109035

from

$547.99
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 – "Yukon Gear Bearing Race Driver for Ford 9"", GM 10.5"", & Chrysler 11.5"" Differentials, 56019" (Part No.56019)

"Yukon Gear Bearing Race Driver for Ford 9"", GM 10.5"", & Chrysler 11.5"" Differentials, 56019"

from

$219.99
Yukon Gear & Axle offers a full line of top quality differential tools to save time and money.
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Motive Gear – Motive Gear Master Bearing Kit, RA310RAMK (Part No.RA310RAMK)

Motive Gear Master Bearing Kit, RA310RAMK

from

$129.99
Motive Gear Differential Bearing Kits Include Front & Rear Pinion Bearing, Pinion Seal, Carrier Bearings, Pilot Bearing Where Applicable, Gear Marking Compound, Crush Sleeve, Pinion Nut, Brush, Thread Locking Compound And Cover Gasket Or Rtv
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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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Pro-King – Pro-King Differential Internal Nest Kit, 761A717 (Part No.761A717)

Pro-King Differential Internal Nest Kit, 761A717

from

$309.99
Pro-King is the leading supplier of transmission and driveline products in the aftermarket.
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Yukon Gear – "Yukon Gear Dura Grip For Ford 7.5"", 26034" (Part No.26034)

"Yukon Gear Dura Grip For Ford 7.5"", 26034"

from

$789.99
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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Yukon Gear – "Yukon Gear Pilot Bearing for Ford 9"", 18042" (Part No.18042)

"Yukon Gear Pilot Bearing for Ford 9"", 18042"

from

$38.99
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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Most Popular Differential Carrier Bearing Set for 1984 Mercury Cougars

Enhance your 1984 Mercury Cougar with one of the 2 Differential Carrier Bearing Set we have in stock, starting at just $11.99.

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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Driveworks – Driveworks Taper Bearing Set, S-A-5 (Part No.S-A-5)

Driveworks Taper Bearing Set, S-A-5

from

$11.99
Value-priced bearing meets all cataloged application requirements.
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Best-Selling 1984 Mercury Cougar Differential Covers

Upgrade your Cougar with one of our 5 best-selling Differential Covers.

Yukon Gear – "Yukon Gear Outer Oil Slinger For Ford 7.5"", 8.8"", 9"", 10.25"", 33022" (Part No.33022)

"Yukon Gear Outer Oil Slinger For Ford 7.5"", 8.8"", 9"", 10.25"", 33022"

from

$8.99
“Replacement outer oil slinger for Ford 7.5″”, 8.8″”, 9″”, 10.25″”, Nissan Titan rear, Dana 44 Rubicon & 44 JK non-Rubicon.”
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Yukon Gear – "Yukon Gear Steel Cover for Ford 8.8"", 32328" (Part No.32328)

"Yukon Gear Steel Cover for Ford 8.8"", 32328"

from

$99.99
These Yukon replacement diff covers are a direct bolt-on.
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Yukon Gear – Yukon Gear Ford OEM Steel Differential Cover, 32364 (Part No.32364)

Yukon Gear Ford OEM Steel Differential Cover, 32364

from

$99.99
These Yukon replacement diff covers are a direct bolt-on.
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Yukon Gear – "Yukon Gear Chrome Cover for 8.8"" Ford, 32009" (Part No.32009)

"Yukon Gear Chrome Cover for 8.8"" Ford, 32009"

from

$74.99
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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Yukon Gear – "Yukon Gear Chrome Cover for 7.5"" Ford, 32008" (Part No.32008)

"Yukon Gear Chrome Cover for 7.5"" Ford, 32008"

from

$42.99
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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Top-Quality Differential Pinion Seals for 1984 Mercury Cougars

Choose a high-quality OEM or aftermarket Differential Pinion Seal for Mercury Cougars and enjoy top-notch performance from $11.99.

Schaeffler – Schaeffler Shaft Seal, SS2865 (Part No.SS2865)

Schaeffler Shaft Seal, SS2865

from

$11.99
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.
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Top Picks for 1984 Mercury Cougar Rear Housing Cover Gaskets

Invest in one of our 2 durable Rear Housing Cover Gaskets for your 1984 Mercury, knowing you’re getting trusted brands and expert craftsmanship.

Felpro – Felpro Axle Housing Cover Gasket Oval Shaped 10 Bolt Hole Gasket, RDS 55393 (Part No.RDS 55393)

Felpro Axle Housing Cover Gasket Oval Shaped 10 Bolt Hole Gasket, RDS 55393

from

$7.49
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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Victor Reinz – Victor Reinz Axle Housing Cover Gasket, 71-14838-00 (Part No.71-14838-00)

Victor Reinz Axle Housing Cover Gasket, 71-14838-00

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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Differential Oil for 1984 Mercury Cougars

Make a smart move for your 1984 Mercury Cougar with products all priced from $35.99 to $137.99.

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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Valvoline – Valvoline Multi-Vehicle (ATF) Full Synthetic Automatic Transmission Fluid 1 GA, 904891 (Part No.904891)

Valvoline Multi-Vehicle (ATF) Full Synthetic Automatic Transmission Fluid 1 GA, 904891

from

$35.99
Choosing an automatic transmission fluid just got easier. Valvoline Full Synthetic MaxLife Multi-Vehicle ATF, the #1 ATF product, is suitable for use in 95% of ATF vehicles in operation with US registered light duty applications. And now, it€™s also recommended for most belt and 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 and tear, and maximize performance €“ all for much longer than conventional fluids. It has improved thermal stability for longer fluid life, better viscosity stability for consistent transmission operation, and frictional enhancements for smooth gear engagements. Whether your vehicle has a CVT or traditional automatic, Valvoline MaxLife Multi-Vehicle ATF is suitable for a broad range of transmissions including Ford, GM, Toyota, Honda, Nissan, Hyundai, Subaru, BMW, Mercedes, Volvo, VW and Audi vehicles. It€™s specifically recommended for use in the following applications: 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. For the many miles ahead, trust your transmission with Valvoline, the #1 automatic transmission fluid brand.
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Top-Rated Differential Brands For Your 1984 Mercury Cougar

When it comes to finding the perfect Differential for your 1984 Mercury Cougar, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 16 trusted brands. We carry the most popular Differential brands including National, Driveworks, 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 $6.99. Purchasing a Differential from us here at Advance Auto Parts is a smart move for both you and your 1984 Mercury Cougar, providing peace of mind with parts that meet or exceed OEM standards.

Popular National 1984 Mercury Cougar Differentials

If you’re looking for a top-quality Differential for your 1984 Mercury Cougar, Advance Auto Parts has exactly what you need with our selection of National Differentials. We have 1 National Differentials in stock for this fitment, all known for their durability and precision fit. With prices starting at just $11.99, you’ll find the perfect Differential for your needs and budget. National Differentials for the 1984 Mercury Cougar come highly rated, with over 2 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.
National Bearing Race, LM501314
from $11.99
(2)
National Bearing Race, LM501314
“good quality & price”

Top-Quality Driveworks 1984 Mercury Cougar Differentials

For those in search of a high-quality Differential for their 1984 Mercury Cougar, Advance Auto Parts offers a great selection of Driveworks Differentials. With 2 Driveworks 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 $11.99, with an average price of $12.24, giving you a range of options to suit your budget. Backed by over 71 customer ratings and an average rating of 4.2 stars, Driveworks Differentials provide both reliability and excellent performance. Choosing a Driveworks Differential from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.
Driveworks Taper Bearing Set, S-A-5
from $11.99
(70)
Driveworks Taper Bearing Set, S-A-5
“Great”
Driveworks Taper Bearing Set, S-A-17
from $12.49
(1)
Driveworks Taper Bearing Set, S-A-17
“Looked felt fine quality”

FAQs for 1984 Mercury Cougar Differentials

What are the best-selling Differentials for 1984 Mercury Cougars?

Out of 149 Differentials that fit 1984 Mercury Cougars, the following parts are the top sellers:

What’s the price range for 1984 Mercury Cougar Differentials?

The prices of Differentials for the 1984 Mercury Cougar range from $1.29 up to $1,115.99 for the most premium parts.

What is the average price of a Differential for a 1984 Mercury Cougar?

The average price for Differentials for the 1984 Mercury Cougar is $217.87. 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 Mercury Cougar model years?

Yes, we carry Differentials for 33 model years of Mercury Cougars between 1967 and 2002. The following model years are the most popular for Differential purchases: 2002, 2001, 2000, 1999, 1997, 1996, 1995, 1994, and 1993.

What are the cheapest Differentials for my 1984 Mercury Cougar?

The cheapest 1984 Mercury Cougar Differentials we carry are:

Does Advance Auto Parts sell Differentials for any other 1984 Mercury models?

Yes. We stock Differentials for 4 other popular 1984 Mercury models. Some of the most popular are 1984 Grand Marquis Differentials, 1984 Capri Differentials, 1984 Marquis Differentials, 1984 Topaz Differentials, and 1984 Lynx Differentials.

What are the top-rated Differentials that fit the 1984 Mercury Cougar?

The one 1984 Mercury Cougar Differential we have in stock is the Pro-King Differential Ring Gear Bolt, 761A935. It costs $1.29.

What types of Differentials do you sell for my 1984 Mercury Cougar?

As of 8/2/26, these are some of the most in-demand types of Differentials for a 1984 Mercury Cougar:

Can I get help with 1984 Mercury Cougar Differential orders?

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

What is your return policy for Mercury Cougar Differentials?

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