1999 Mercury Cougar Differentials
Keep Your 1999 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 1999 Mercury Cougar looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Differential Bearing Kits, Differential Ring Gear Bolts, and Differential Crush Sleeves. 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 Valvoline. For example, Valvoline Differentials start at just $14.49 with an average 4.8 star rating. With over 6 reviews and a solid 4 star average, you can shop with confidence knowing other Mercury Cougar owners approve.
Competitive Prices and Extensive Inventory
The average price for a 1999 Mercury Cougar Differential at Advance Auto Parts is around $40.04, with a range that starts at $1.29 and goes up to $242.99. With 14 options in stock from 6 trusted brands, finding the right fit is easy. Popular picks like DEX/MERC ATF Conventional Automatic Transmission Fluid, 1 Quart, Shaft Repair Sleeve, and Differential Rebuild Kit start at just $11.99 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 Transfer Cases. At Advance Auto Parts, we’re here to help you keep your 1999 Mercury Cougar in peak condition, inside and out.
Find Your Specific 1999 Mercury Cougar Differentials
Looking for the perfect Differential for your 1999 Mercury Cougar? You’re in the right place. Below, you’ll find links to various types of Differentials that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Differentials, ensuring durability and a precise fit for your Mercury Cougar. Whether you’re driving a 1999 model or another popular model year like
1992,
1993,
1994,
1995,
1996,
1997,
2000,
2001, and
2002, we’ve got you covered. Purchasing Differentials from Advance Auto Parts is a smart choice, giving you access to trusted brands and parts built to perform. Below, you’ll find links to various types of Differentials that fit your vehicle.
Essential 1999 Mercury Cougar Differentials
Yukon Gear – 7.5", 8", 8.8", 9", 10.25" Ford Redi Sleeve Yoke Saver (Part No.30226)
from
$30.99
7.5″, 8″, 8.8″, 9″, 10.25″ Ford REDI sleeve yoke saver.Yukon Mighty seal.
Product Features:
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Product Features:
- Redi-Sleeve yoke saver
- Fits Ford 7.5″, 8.8″, 9″ and 10.25″
National – Shaft Repair Sleeve (Part No.99157)
from
$37.99
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:
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Product Features:
- Designed to repair damaged, grooved or worn shafts
- Durable stainless steel construction for corrosion-free sealing surface that surpasses most original shaft specifications
- Ideal for a shaft where indications of seal wear, such as tracks or grooves have developed
- Ultra-thin construction (0.01/0.25mm wall thickness) allows original seal size to be used with minimal additional lip loading
- Easy to install with removable flange and installation tool
- Installation tool reduces sleeve distortion and allows for installation without removal from the shaft
Yukon Gear – Crush Sleeve (Part No.33093)
from
$10.99
Crush Sleeve for Model 35, Chrysler 7.25″, 8.25″ Ford 8″ & GM 7.75″. Approx 0.495″ long.
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Product Features:
- Crush sleeve for AMC Model 35, Chrysler 7.25″ and 8.25″, Ford 8″ and GM 7.75″
- 0.495″ tall
Yukon Gear – Crush Sleeve Eliminator Kit For Ford 9" For 35 Spline Pinion (Part No.55042)
from
$175.99
9″ large solid pinion preload spacer & shim kit for 35 spline pinion.
Product Features:
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Product Features:
- Crush sleeve eliminator kit for Ford 9″ with 35 spline pinion
Dorman – Help – Differential Shaft Lock Bolt (Part No.81048)
from
$6.79
This differential pinion shaft lock bolt 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:
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Product Features:
- Direct replacement – this differential pinion shaft lock bolt matches the fit and function of the factory part on specified years, makes and models
- Ideal solution – this bolt 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
Pro-King – Differential Cross Shaft (Part No.742G930)
from
$2.99
Pro-King is the leading supplier of transmission and driveline products in the aftermarket.
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Product Features:
- All products are designed to meet or exceed OE quality, form, fit and funtion.
Yukon Gear – Pinion Depth Shims For GM 8.25" IFS, 8.5", 12 Bolt Car, Ford 8.8" & Chrysler 8.25" (Part No.55009)
from
$27.99
8.25″ IFS, 8.5″, 12P, 7.5″ F, 8.8″ F, 8.25″ Chrysler pinion shim kit.
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Product Features:
- Pinion depth shims for GM 8.25″ IFS, 8.5″, 8.6″, 12 bolt passenger car, Ford 7.5″ and 8.8″, Chrysler 8.25″
Yukon Gear – Pinion Depth Shims For Ford 9" (Part No.55056)
Yukon Gear – Preload Shim Kit For Chrysler 8.75" & Ford 9" (Part No.55030)
from
$21.99
8.75″ Chrysler & 9″ Ford preload shim kit.
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Product Features:
- Preload shim kit for Ford 9″ and Chrysler 8.75″ with ’41’ and ’42’ case housing
ARP Auto Racing – For Use With Ford 9" Using 5/8"Socket, 0.94"L Under Head, 7/16"-20, 12Point Head (Part No.250-3002)
from
$43.99
The tremendous shock loads generated at launch by most any drag racing vehicle equipped with today sticky tire compounds or the acceleration and deceleration of oval track cars put considerable strain on the ring gear. For this reason, the fastener experts at ARP have developed the Pro Series ring gear bolts. they are forged from premium grade 8740 chrome moly steel and are heat treated to a nominal rating of 200,000 PSI tensile strength. Specially hardened, precision ground washers are included where required. Available to fit most any ring gear setup ranging from popular 9 Inch Ford GM 10 and 12 bolt rear ends to the beefy strange differentials found in top fuel and funny car applications.
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Product Features:
- Forged From Premium Grade 8740 Chrome Moly Steel
- Heat Treated
- Nominally Rated At 200,000 PSI Tensile Strength
- Specially Hardened, Precision Ground Washers
- 0.95″ Underhead Length
- 200,000 PSI
- Sold As A Set
ARP Auto Racing – For Use With Ford 8.8 And 9" Using 3/4"Socket, 0.75"L Under Head, 7/16"-20 (Part No.250-3003)
from
$43.99
The tremendous shock loads generated at launch by most any drag racing vehicle equipped with today sticky tire compounds or the acceleration and deceleration of oval track cars put considerable strain on the ring gear. For this reason, the fastener experts at ARP have developed the Pro Series ring gear bolts. they are forged from premium grade 8740 chrome moly steel and are heat treated to a nominal rating of 200,000 PSI tensile strength. Specially hardened, precision ground washers are included where required. Available to fit most any ring gear setup ranging from popular 9 Inch Ford GM 10 and 12 bolt rear ends to the beefy strange differentials found in top fuel and funny car applications.
Product Features:
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Product Features:
- Forged From Premium Grade 8740 Chrome Moly Steel
- Heat Treated
- Nominally Rated At 200,000 Psi Tensile Strength
- Specially Hardened, Precision Ground Washers
- 0.75″ Underhead Length
- 200,000 PSI
- Sold As A Set
Motive Gear – Ring Gear Bolt (Part No.D5AZ4216A)
Powertrax – Grip LS Traction System (Part No.LS108831)
from
$463.99
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 – Trac Loc Case For Ford 8" (Part No.20075)
from
$379.99
8″ TracLoc case, bare, 2 or 4 PIN, 4 TAB clutch design.
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Product Features:
- Trac Loc positraction carrier case
- Does not include spider gears
- Fits Ford 8″
Motive Gear – Differential Carrier (Part No.D3TZ4204A)
Idemitsu – Type HP Automatic Transmission Fluid , 1 Quart (Part No.10107-042F)
from
$10.29
Formulated to meet the specific requirements of Subaru vehicles equipped with conventional (non-CVT) transmissions up to model year 2005. Recommended for service-fill in all Subaru automatic transmissions where SUBARU ATF HP is specified. Fuel economy demands and more sophisticated electronic controls have made automatic transmissions not only more complex, but also unique to each vehicle manufacturer. Long gone are the days of having just a couple choices of automatic transmission fluid type. Idemitsu is the factory fill Automatic Transmission Fluid (ATF) supplier to most Asian imports. Idemitsu application-specific ATF products match the exact friction materials and performance requirements of each different vehicle model for which they are made.
Product Features:
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Product Features:
- Excellent resistance to oxidation and thermal breakdown provide long fluid life and extended protection
- Precisely engineered frictional characteristics guarantee smooth shifting and outstanding anti-shudder performance
- Excellent resistance to oxidation and thermal breakdown provide long fluid life and extended protection
- Excellent seal compatibility and conditioning reduces risk of fluid leaks due to seal shrinkage, hardening and cracking
- Advanced anti-wear technology provides maximum protection to gears and bearings
- Precisely engineered frictional characteristics guarantee smooth shifting and outstanding anti-shudder performance
- Provides superior cleanliness, maintaining the transmission free of sludge and varnish deposits
- Excellent seal compatibility and conditioning reduces risk of fluid leaks due to seal shrinkage, hardening and cracking
- Advanced anti-wear technology provides maximum protection to gears and bearings
Yukon Gear – Redline Synthetic "Shock Proof" Oil – 4 Quarts (Part No.15004)
from
$137.99
Redline Synthetic “Shock Proof” Oil. 4 Quarts.
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Product Features:
- Includes four quarts of Redline Shockproof oil
Valvoline – SynPower Transmission & Differential Gear Oil: Full Synthetic 75W-140, 1 Gallon (Part No.887344)
from
$69.99
Valvoline SAE 75W-140 Full Synthetic Gear Oil provides the ultimate gear protection in hypoid rear differentials and non-synchronized manual transmissions. Engineered to outperform, our formulation provides exceptional high and low temperature protection and excellent thermal stability, especially in demanding driving situations such as towing and off-roading. It contains an extreme pressure additive for better load carrying capacity and wear resistance, a limited slip additive for optimal clutch pack performance, and an anti-foaming agent for better lubrication and service life. It’s recommended for conventional rear axles and transmissions requiring EP gear lubes under high speed, high load, high torque and high horsepower conditions.
Product Features:
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Product Features:
- EXCEPTIONAL HIGH AND LOW TEMPERATURE PROTECTION ranging from -22F to 390F degrees
- REDUCES CHATTERING AND PROTECTS GEAR TEETH from oxidation, rust, and wear
- FIGHTS CORROSION AND RUST with emulsifying agents and safeguards against impurities, oxidation and thermal breakdown
- MEETS THE DEMANDS OF CONVENTIONAL AND LIMITED SLIP REAR DIFFERENTIALS where API GL-5 is specified, as well as non-synchronized manual transmissions that require API GL-4
- MEETS OR EXCEEDS PERFORMANCE REQUIREMENTS for Ford M2C-192A, GM 12346140, Chrysler MS-8985 and API GL-5
Pro-King – Differential Cover Gasket (Part No.762B303)
from
$4.99
Pro-King is the leading supplier of transmission and driveline products in the aftermarket.
Product Features:
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Product Features:
- All products are designed to meet or exceed OE quality, form, fit and funtion.
Yukon Gear – 8.8" Ford Cover Gasket (Part No.23011)
Yukon Gear – 8" Dropout Housing Gasket (Part No.23010)
Driveworks – Camshaft Seal (Part No.S-99139)
Motive Gear – Differential Bearing Kit – Timken (Part No.R9RT)
from
$115.99
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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Product Features:
- KIT BRG & SEAL FORD 9″
Yukon Gear – Master Overhaul Kit For Ford 8" Differential With HD Pinion Support (Part No.14049)
from
$297.99
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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Product Features:
- Fits Ford 8″ with Daytona pinion support
- Included are Timken bearings and races, pinion bearings and races, pinion seal, complete shim kit, ring gear bolts, pinion nut, crush sleeve, pilot bearing, thread locker, marking compound with brush, and gasket.
LuK – Differential Repair Kit (Part No.GDK311)
from
$251.99
Product Features:
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- Each LuK GearBOX contains all the OE quality bearings needed for a professional transmission repair
- LuK Differential Bearing Kits are designed to meet or exceed OEM requirements. This will ensure customer satisfaction.
- LuK Differential Bearing Kits contain the bearings and seals needed to complete the job.
- LuK Differential Bearing Kits include wear parts such as seals, O-rings, shaft sealing rings, support bearings and spare parts where necessary for eliminating the specific cause of failure.
Yukon Gear – Master Overhaul Kit For Ford 8" Differential (Part No.14048)
from
$299.99
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.
Product Features:
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Product Features:
- Fits Ford 8″ with aftermarket positraction
- Included are Timken 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.
Motive Gear – Differential Master Bearing Kit – Timken (Part No.R7.5FRMKT)
from
$111.99
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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Product Features:
- FORD 7.5″ MASTER BEARING KIT (TIMKEN)
Motive Gear – Differential Super Bearing Kit – Koyo (Part No.R7.5FRSK)
from
$113.99
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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Product Features:
- KIT, SUPER BRG & SEAL-FORD 7.5
Popular 1999 Mercury Cougar Differentials Categories
Most Popular Differential Bearing Kit for 1999 Mercury Cougars
Enhance your 1999 Mercury Cougar with this popular Differential Bearing Kit we have in stock, for $125.99.
Pro-King – Differential Rebuild Kit (Part No.762B004)
from
$125.99
Pro-King is the leading supplier of transmission and driveline products in the aftermarket. All products are designed to meet or exceed OE quality, form, fit and funtion.
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Product Features:
- Contains the highest quality Japanese bearings
Best-Selling 1999 Mercury Cougar Differential Ring Gear Bolt
Upgrade your Cougar with our best-selling Differential Ring Gear Bolt.
Pro-King – Differential Ring Gear Bolt (Part No.761A935)
from
$1.29
Pro-King is the leading supplier of transmission and driveline products in the aftermarket.
Product Features:
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Product Features:
- All products are designed to meet or exceed OE quality, form, fit and funtion.
Top-Quality Differential Crush Sleeves for 1999 Mercury Cougars
Choose a high-quality OEM or aftermarket Differential Crush Sleef for Mercury Cougars and enjoy top-notch performance from $2.99.
Pro-King – Differential Crush Sleeve (Part No.761A034)
from
$2.99
Pro-King is the leading supplier of transmission and driveline products in the aftermarket.
Product Features:
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Product Features:
- All products are designed to meet or exceed OE quality, form, fit and funtion.
Top Picks for 1999 Mercury Cougar Differential Oil
Invest in one of our 3 durable Differential Oil for your 1999 Mercury, knowing you’re getting trusted brands and expert craftsmanship.
Valvoline – DEXRON – VI ATF Full Synthetic Automatic Transmission Fluid, 1 Quart (Part No.822405)
from
$14.49
Valvoline DEXRON-VI/MERCON LV ATF is a full-synthetic transmission fluid formulated with advanced additive technology to meet and exceed the requirements of the General Motors DEXRON-VI specification. It is officially licensed and approved by GM and is fully back-serviceable and can be used wherever DEXRON-II and/or DEXRON-III are recommended. Recommended for use in the following applications: DEXRON-VI, DEXRON-III, DEXRON-II, and Allison C-4.
Product Features:
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Product Features:
- Formulated with full-synthetic base stocks and advanced additive technology to meet the challenging demands of automatic transmissions
- Enhanced anti-shudder protection for smooth shifting and maximum power transfer
- Developed with anti-wear technology to help improve transmission durability
- Engineered with a proprietary blend of base oils and advanced additives to provide better oil flow at low temperatures and greater film protection at higher temperatures
Valvoline – DEX/MERC ATF Conventional Automatic Transmission Fluid, 1 Quart (Part No.798153)
from
$11.99
Valvoline DEX/MERC ATF is a high-quality transmission fluid formulated to meet the challenging demands of many automatic transmissions. Its responsive low-temperature fluidity is beneficial in both electronic and hydraulic controlled transmissions and transaxles. Recommended for use in the following applications: MERCON*, DEXRON*-III, Ford M2C138-CJ and M2C166-H, Allison C-4 and TES-389, and Caterpillar TO-2.
Product Features:
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Product Features:
- Formulated with premium base stocks and advanced additive technology to meet the challenging demands of automatic transmissions
- Enhanced anti-shudder protection for smooth shifting and maximum power transfer
- Developed with anti-wear technology to help improve transmission durability
- Engineered with a proprietary blend of base oils and advanced additives to provide better oil flow at low temperatures and greater film protection at higher temperatures
Idemitsu – Type HP Automatic Transmission Fluid , 1 Quart (Part No.10107-042F)
from
$10.29
Formulated to meet the specific requirements of Subaru vehicles equipped with conventional (non-CVT) transmissions up to model year 2005. Recommended for service-fill in all Subaru automatic transmissions where SUBARU ATF HP is specified. Fuel economy demands and more sophisticated electronic controls have made automatic transmissions not only more complex, but also unique to each vehicle manufacturer. Long gone are the days of having just a couple choices of automatic transmission fluid type. Idemitsu is the factory fill Automatic Transmission Fluid (ATF) supplier to most Asian imports. Idemitsu application-specific ATF products match the exact friction materials and performance requirements of each different vehicle model for which they are made.
Product Features:
See More
Product Features:
- Excellent resistance to oxidation and thermal breakdown provide long fluid life and extended protection
- Precisely engineered frictional characteristics guarantee smooth shifting and outstanding anti-shudder performance
- Excellent resistance to oxidation and thermal breakdown provide long fluid life and extended protection
- Excellent seal compatibility and conditioning reduces risk of fluid leaks due to seal shrinkage, hardening and cracking
- Advanced anti-wear technology provides maximum protection to gears and bearings
- Precisely engineered frictional characteristics guarantee smooth shifting and outstanding anti-shudder performance
- Provides superior cleanliness, maintaining the transmission free of sludge and varnish deposits
- Excellent seal compatibility and conditioning reduces risk of fluid leaks due to seal shrinkage, hardening and cracking
- Advanced anti-wear technology provides maximum protection to gears and bearings
Our Rear Differential Cover Gaskets for 1999 Mercury Cougars
Make a smart move for your 1999 Mercury Cougar with our Rear Differential Cover Gasket for $4.99.
Pro-King – Differential Cover Gasket (Part No.762B303)
from
$4.99
Pro-King is the leading supplier of transmission and driveline products in the aftermarket.
Product Features:
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Product Features:
- All products are designed to meet or exceed OE quality, form, fit and funtion.
Top-Rated Differential Brands For Your 1999 Mercury Cougar
When it comes to finding the perfect Differential for your 1999 Mercury Cougar, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 6 trusted brands. We carry the most popular Differential brands including Valvoline, and more, all known for their exceptional customer ratings (average brand rating of 4.8 stars) and competitive prices, as low as $14.49. Purchasing a Differential from us here at Advance Auto Parts is a smart move for both you and your 1999 Mercury Cougar, providing peace of mind with parts that meet or exceed OEM standards.
Popular Valvoline 1999 Mercury Cougar Differentials
If you’re looking for a top-quality Differential for your 1999 Mercury Cougar, Advance Auto Parts has exactly what you need with our selection of Valvoline Differentials. We have 1 Valvoline Differentials in stock for this fitment, all known for their durability and precision fit. With prices starting at just $14.49, you’ll find the perfect Differential for your needs and budget. Valvoline Differentials for the 1999 Mercury Cougar come highly rated, with over 2 customer reviews and an impressive average rating of 4.8 stars. Choosing a Valvoline Differential from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
from
$14.49
(2)
DEXRON – VI ATF Full Synthetic Automatic Transmission Fluid, 1 Quart
“I’ve used this in my 2005 2500HD since I bought the truck with 20k on it now at 280k changed every other year maybe 40k I’d put on in two years,
I pu”
FAQs for 1999 Mercury Cougar Differentials
What are the best-selling Differentials for 1999 Mercury Cougars?
Out of 14 Differentials that fit 1999 Mercury Cougars, the following parts are the top sellers:
- DEX/MERC ATF Conventional Automatic Transmission Fluid, 1 Quart (12079139) – $11.99
- Shaft Repair Sleeve (18445098) – $37.99
- Differential Rebuild Kit (10282430) – $125.99
What’s the price range for 1999 Mercury Cougar Differentials?
The prices of Differentials for the 1999 Mercury Cougar range from $1.29 up to $242.99 for the most premium parts.
What is the average price of a Differential for a 1999 Mercury Cougar?
The average price for Differentials for the 1999 Mercury Cougar is $40.04. 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?
What are the cheapest Differentials for my 1999 Mercury Cougar?
The cheapest 1999 Mercury Cougar Differentials we carry are:
- Differential Ring Gear Bolt (10282257) – $1.29
- Differential Cross Shaft (10282201) – $2.99
- Differential Crush Sleeve (10282338) – $2.99
- Differential Cover Gasket (10282380) – $4.99
- Differential Pinion Shim Kit (10282353) – $6.99
Does Advance Auto Parts sell Differentials for any other 1999 Mercury models?
Yes. We stock Differentials for 5 other popular 1999 Mercury models. Some of the most popular are 1999 Grand Marquis Differentials, 1999 Mountaineer Differentials, 1999 Tracer Differentials, 1999 Mystique Differentials, and 1999 Sable Differentials.
What are the top-rated Differentials that fit the 1999 Mercury Cougar?
The one 1999 Mercury Cougar Differential we have in stock is the Differential Ring Gear Bolt. It costs $1.29.
What types of Differentials do you sell for my 1999 Mercury Cougar?
As of 11/2/25, these are some of the most in-demand types of Differentials for a 1999 Mercury Cougar:
Can I get help with 1999 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.