2009 Mercury Mountaineer Differentials

Please Select your Vehicle to See Exact Fit Parts

Keep Your 2009 Mercury Mountaineer in Top Shape with Quality Differentials

Whether you’re repairing or upgrading your Differential, using high-quality parts is key to keeping your 2009 Mercury Mountaineer looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Differential Pinion Seals, Differential Pinion Bearing Kits, and Differential Oil. 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, Royal Purple, and National. For example, Motive Gear Differentials start at just $6.99 with an average 4.1 star rating. Royal Purple and National offer similar pricing and quality, backed by strong customer feedback. With over 549 reviews and a solid 4.3 star average, you can shop with confidence knowing other Mercury Mountaineer owners approve.

Competitive Prices and Extensive Inventory

The average price for a 2009 Mercury Mountaineer Differential at Advance Auto Parts is around $197.13, with a range that starts at $1.29 and goes up to $1,115.99. With 172 options in stock from 15 trusted brands, finding the right fit is easy. Popular picks like Valvoline Flex Fill Transmission & Differential Gear Oil: Full Synthetic 75W-140, 1 Quart, 889787, Dorman – Help Differential Shaft Lock Bolt, 81048, and Yukon Gear 3 Qt – Penzoil 80W90 Conventional Gear Oil, 15002 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 2009 Mercury Mountaineer in peak condition, inside and out.

Essential 2009 Mercury Mountaineer Differentials

Powertrax – Powertrax Grip PRO Traction System, GT443527 (Part No.GT443527)

Powertrax Grip PRO Traction System, GT443527

from

$526.69
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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Dorman – Dorman Differential Yoke including Seal and Pinion Nut, 697-507 (Part No.697-507)

Dorman Differential Yoke including Seal and Pinion Nut, 697-507

from

$53.99
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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ATP – ATP Differential Cover Kit With Internal Magnet, 111103 (Part No.111103)

ATP Differential Cover Kit With Internal Magnet, 111103

from

$38.99
Differential covers can become damaged from road debris, corrosion, or bolt/drain plug over tightening. Their job is to act as a lid keeping lubricants in place for the ring and pinion gears, bearings, and bushings. Without lubricants, the differential quickly become damaged. ATP Differential Cover Kits include a replacement gasket and are designed to fit and function just like the original part ensuring long life and durability.
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Yukon Gear – Yukon Gear Dana 30 Side Gear Thrust Washer, 33284 (Part No.33284)

Yukon Gear Dana 30 Side Gear Thrust Washer, 33284

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 High Performance Ring & Pinion Gear Set For Ford 8.8"" In A 3.55 Ratio, 24095" (Part No.24095)

"Yukon Gear High Performance Ring & Pinion Gear Set For Ford 8.8"" In A 3.55 Ratio, 24095"

from

$419.99
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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USA Standard Gear – USA Standard Gear Differential Rebuild Kit, 37031 (Part No.37031)

USA Standard Gear Differential Rebuild Kit, 37031

from

$359.99
USA Standard Master Overhaul kits let you finish your install with confidence. This kit uses Koyo bearings and races. Included are carrier bearings and races, pinion bearings and races, pinion seal, complete shim kit, ring gear bolts, pinion nut, crush sleeve (if applicable), oil baffles and slingers (if applicable), threading locking compound, marking compound with brush and gasket.
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Yukon Gear – Yukon Gear Replacement Cover Gasket For Dana 30, 23003 (Part No.23003)

Yukon Gear Replacement Cover Gasket For Dana 30, 23003

from

$12.99
“Yukon 1541H alloy 6 lug right hand rear axle for ’97 to ’04 Chrysler 9.25″” Durango with a length of 30-1/2 inches and 31 splines. 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 C-clip axle.”
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Motive Gear – Motive Gear Differential Pinion Shim Kit, 1100 (Part No.1100)

Motive Gear Differential Pinion Shim Kit, 1100

from

$6.99
High-quality Differential Component Shim
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Motive Gear – Motive Gear Differential Internal Carrier Gear Kit, F8.8BI (Part No.F8.8BI)

Motive Gear Differential Internal Carrier Gear Kit, F8.8BI

from

$96.99
Motive Gear Differential Internal Carrier Gear Kit, F8.8BI.
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National – National Shaft Repair Sleeve, 99166 (Part No.99166)

National Shaft Repair Sleeve, 99166

from

$36.49
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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Powertrax – Powertrax Differential Lock Assembly, 9206883108 (Part No.9206883108)

Powertrax Differential Lock Assembly, 9206883108

from

$544.99
For vehicles that are driven daily, the Power Trax No-Slip Traction System is the latest design in quiet traction-adding differential technology. It combines the automatic street-friendly smooth operation of a limited-slip differential with the traction performance of a locking differential. The Power Trax No-Slip locker easily installs in to your differential carrier using basic tools and without affecting your ring and pinion settings. Power Trax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Power Trax Grip-Pro and Grip-LS performance limited slips offer smooth dependable torque transfer and traction for the best of both worlds.
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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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Powertrax – Powertrax Grip LS Traction System, LS108831 (Part No.LS108831)

Powertrax Grip LS Traction System, 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 – Yukon Gear Bearing Race Driver for Popular Ford, Gm, Amc, Chrysler, and Dana Diffs, 56020 (Part No.56020)

Yukon Gear Bearing Race Driver for Popular Ford, Gm, Amc, Chrysler, and Dana Diffs, 56020

from

$215.99
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 Differential Pinion Seal, 470331N (Part No.470331N)

Motive Gear Differential Pinion Seal, 470331N

from

$17.49
Motive Gear offers some of the toughest drive train components on the market today. If you are looking for the largest line of performance ring and pinion gear options available with gear sets in a wide range of ratios for nearly every application, both on and off-road, check out Motive Gear. Motive Gear products can be found in the winner’s circle at racing events worldwide. The superior quality of Motive Gear components is the result of years of racing development, outstanding design and state-of-the-art manufacturing methods. Extensive testing is performed on all products by our in-house engineers.
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Yukon Gear – "Yukon Gear 8.8"" Ford 3/4"" Notched cross pin shaft (0.750"", ’85 and older)., 33432" (Part No.33432)

"Yukon Gear 8.8"" Ford 3/4"" Notched cross pin shaft (0.750"", '85 and older)., 33432"

from

$78.99
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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Felpro – Felpro Axle Housing Cover Gasket Round Shaped 10 Bolt Hole Gasket, RDS 55460 (Part No.RDS 55460)

Felpro Axle Housing Cover Gasket Round Shaped 10 Bolt Hole Gasket, RDS 55460

from

$8.99
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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Pro-King – Pro-King Differential Cover Gasket, 762B303 (Part No.762B303)

Pro-King Differential Cover Gasket, 762B303

from

$4.99
Pro-King is the leading supplier of transmission and driveline products in the aftermarket.
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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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Motive Gear – Motive Gear Differential Master Bearing Kit – Koyo, R8.8RMK (Part No.R8.8RMK)

Motive Gear Differential Master Bearing Kit - Koyo, R8.8RMK

from

$128.99
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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Yukon Gear – "Yukon Gear Pinion Gear and Thrust Washer (0.875"" Shaft) for 8.8"" Ford, 33299" (Part No.33299)

"Yukon Gear Pinion Gear and Thrust Washer (0.875"" Shaft) for 8.8"" Ford, 33299"

from

$11.99
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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Motive Gear – Motive Gear Differential Pinion Nut, 379570S (Part No.379570S)

Motive Gear Differential Pinion Nut, 379570S

from

$6.99
All Motive Gear products are engineered for their specific application and manufactured in state of the art facilities. All of our products undergo rigid quality control processes to insure proper fit, performance and longevity. Motive Gear products can be found in the winners circle at NHRA, IHRA, NMRA, NMCA, SODA, SCORE, BITD, Ultra-4 and NASCAR events because we offer unmatched selection and quality demanded by racers and their crew chiefs – the same quality and selection demanded by DIY customers and top mechanics. With four warehouses strategically located across North America, most Motive Gear orders arrive within 2-4 days. Win with Motive Gear.
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Yukon Gear – "Yukon Gear Super Carrier Shim Kit for Ford 8.8"", GM 12 bolt car & truck, 8.6 & Vette, 55002" (Part No.55002)

"Yukon Gear Super Carrier Shim Kit for Ford 8.8"", GM 12 bolt car & truck, 8.6 & Vette, 55002"

from

$59.99
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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Motive Gear – Motive Gear Ring Gear Bolt, D5AZ4216A (Part No.D5AZ4216A)

Motive Gear Ring Gear Bolt, D5AZ4216A

from

$1.99
Motive Gear Ring Gear Bolt, D5AZ4216A.
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Yukon Gear – Yukon Gear Replacement Oil Baffle for Model 35 IFS Front, Dana 25, 27, 30, 44 IFS, 33002 (Part No.33002)

Yukon Gear Replacement Oil Baffle for Model 35 IFS Front, Dana 25, 27, 30, 44 IFS, 33002

from

$4.99
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 Zip Locker Switch, 34015 (Part No.34015)

Yukon Gear Zip Locker Switch, 34015

from

$16.99
The Yukon Zip Locker is the latest in on-demand traction. Its air-operated design allows you to switch from an open differential to 100% lockup when you need it, giving you the ultimate in driver select ability.
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Yukon Gear – "Yukon Gear Model 35 Roll Pin for Cross Pin Shaft, 0.190"" Diameter, 33320" (Part No.33320)

"Yukon Gear Model 35 Roll Pin for Cross Pin Shaft, 0.190"" Diameter, 33320"

from

$5.99
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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National – National Drive Axle Shaft Seal, 710429 (Part No.710429)

National Drive Axle Shaft Seal, 710429

from

$22.29
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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Most Popular Differential Pinion Seals for 2009 Mercury Mountaineers

Enhance your 2009 Mercury Mountaineer with one of the 3 Differential Pinion Seals we have in stock, starting at just $11.99.

Motive Gear – Motive Gear Differential Pinion Seal, 470331N (Part No.470331N)

Motive Gear Differential Pinion Seal, 470331N

from

$17.49
Motive Gear offers some of the toughest drive train components on the market today. If you are looking for the largest line of performance ring and pinion gear options available with gear sets in a wide range of ratios for nearly every application, both on and off-road, check out Motive Gear. Motive Gear products can be found in the winner’s circle at racing events worldwide. The superior quality of Motive Gear components is the result of years of racing development, outstanding design and state-of-the-art manufacturing methods. Extensive testing is performed on all products by our in-house engineers.
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Schaeffler – Schaeffler Shaft Seal, SS2876 (Part No.SS2876)

Schaeffler Shaft Seal, SS2876

from

$14.99
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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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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Best-Selling 2009 Mercury Mountaineer Differential Pinion Bearing Kits

Upgrade your Mountaineer with one of our 2 best-selling Differential Pinion Bearing Kits.

Yukon Gear – "Yukon Gear Pinion Install Kit for Ford 8.8"" Differential, 13041" (Part No.13041)

"Yukon Gear Pinion Install Kit for Ford 8.8"" Differential, 13041"

from

$167.99
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 Pinion Setup Bearing for Popular GM, Ford, Dana, & Chrysler Differentials, 56045 (Part No.56045)

Yukon Gear Pinion Setup Bearing for Popular GM, Ford, Dana, & Chrysler Differentials, 56045

from

$153.99
Yukon Gear & Axle offers a full line of top quality differential tools to save time and money.
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Top-Quality Differential Oil for 2009 Mercury Mountaineers

Choose a high-quality OEM or aftermarket Differential Oil for Mercury Mountaineers and enjoy top-notch performance from $15.99.

Royal Purple – Royal Purple MaxGear SAE 75W90 High Performance Gear Oil w/Friction Modifier Additive, 1 QT, 01300 (Part No.01300)

Royal Purple MaxGear SAE 75W90 High Performance Gear Oil w/Friction Modifier Additive, 1 QT, 01300

from

$26.49
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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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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Valvoline – Valvoline Flex Fill Transmission & Differential Gear Oil: Full Synthetic 75W-140, 1 Quart, 889787 (Part No.889787)

Valvoline Flex Fill Transmission & Differential Gear Oil: Full Synthetic 75W-140, 1 Quart, 889787

from

$19.99
We’ve squeezed innovation into every ounce of Valvoline FlexFill SAE 75W-140 Full Synthetic Gear Oil, the ultimate gear protection in hypoid rear differentials and non-synchronized manual transmissions. Our unique new flexible pouch makes getting into the tightest places to lubricate gears easier than ever and with less waste. The superior detergent package-based formulation contains fully synthetic basestocks and special additives that help protect parts from rust and corrosion while providing 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, wear resistance additives that assist in protecting gear teeth, a limited slip additive for optimal clutch pack performance, and an anti-foaming agent for better lubrication and service life. Valvoline FlexFill SAE 75W-140 Full Synthetic Gear Oil is recommended for use in axle applications requiring factory-fill or drain-and-fill levels for limited slip performance. Volume: 1 quart.
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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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Valvoline – Valvoline Extended Protection Full Synthetic Automatic Transmission Fluid ATF 1 QT, 904976 (Part No.904976)

Valvoline Extended Protection Full Synthetic Automatic Transmission Fluid ATF 1 QT, 904976

from

$15.99
Modern transmissions are better than ever, with more gears to help improve fuel efficiency and acceleration. Greater performance calls for greater protection. Valvoline Extended Protection Full Synthetic ATF features our exclusive Dual Defense Additive Technology for two layers of protection against metal-on-metal contact and thermal breakdown, all while minimizing wear on clutch components. In fact, Valvoline Extended Protection Full Synthetic ATF is 45% stronger against breakdown compared to major brand DEX/MERC oxidative PDSC performance. Proven to maximize transmission life, our patented formula keeps your modern vehicle shifting smoothly, mile after mile, with the ultimate protection you can only expect from Valvoline, the #1 ATF brand.
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Top Picks for 2009 Mercury Mountaineer Differential Covers

Invest in one of our 6 durable Differential Covers for your 2009 Mercury, knowing you’re getting trusted brands and expert craftsmanship.

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 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 Replacement Chrome Cover for Dana 30 Standard Rotation, 32003 (Part No.32003)

Yukon Gear Replacement Chrome Cover for Dana 30 Standard Rotation, 32003

from

$52.99
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 Polished Aluminum Replacement Cover for Dana 30 Standard Rotation, 32021 (Part No.32021)

Yukon Gear Polished Aluminum Replacement Cover for Dana 30 Standard Rotation, 32021

from

$201.99
These Yukon replacement diff covers take your rig a step beyond the boring factory look. They are the stock OE design made from aluminum and polished to perfection.
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Yukon Gear – Yukon Gear Steel Cover for Dana 30 Standard Rotation Front, 32316 (Part No.32316)

Yukon Gear Steel Cover for Dana 30 Standard Rotation Front, 32316

from

$138.99
These Yukon replacement diff covers are a direct bolt-on.
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Our Top-Rated Rear Housing Cover Gaskets for 2009 Mercury Mountaineers

Make a smart move for your 2009 Mercury Mountaineer with our Rear Housing Cover Gasket for $8.99.

Felpro – Felpro Axle Housing Cover Gasket Round Shaped 10 Bolt Hole Gasket, RDS 55460 (Part No.RDS 55460)

Felpro Axle Housing Cover Gasket Round Shaped 10 Bolt Hole Gasket, RDS 55460

from

$8.99
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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Top-Rated Differential Brands For Your 2009 Mercury Mountaineer

When it comes to finding the perfect Differential for your 2009 Mercury Mountaineer, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 15 trusted brands. We carry the most popular Differential brands including Royal Purple, National, and Motive Gear, and more, all known for their exceptional customer ratings (average brand rating of 4.8 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 2009 Mercury Mountaineer, providing peace of mind with parts that meet or exceed OEM standards.

Popular Royal Purple 2009 Mercury Mountaineer Differentials

If you’re looking for a top-quality Differential for your 2009 Mercury Mountaineer, Advance Auto Parts has exactly what you need with our selection of Royal Purple Differentials. We have 2 Royal Purple Differentials in stock for this fitment, all known for their durability and precision fit. With prices starting at just $26.49 and an average cost of $27.49, you’ll find the perfect Differential for your needs and budget. Royal Purple Differentials for the 2009 Mercury Mountaineer come highly rated, with over 131 customer reviews and an impressive average rating of 4.8 stars. Choosing a Royal Purple Differential from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.

Top-Quality National 2009 Mercury Mountaineer Differentials

For those in search of a high-quality Differential for their 2009 Mercury Mountaineer, Advance Auto Parts offers a great selection of National Differentials. With 2 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 $11.99, with an average price of $17.14, giving you a range of options to suit your budget. Backed by over 14 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.
National Drive Axle Shaft Seal, 710429
from $22.29
(12)
National Drive Axle Shaft Seal, 710429
“Exact fit”
National Bearing Race, LM501314
from $11.99
(2)
National Bearing Race, LM501314
“good quality & price”

FAQs for 2009 Mercury Mountaineer Differentials

What are the best-selling Differentials for 2009 Mercury Mountaineers?

Out of 172 Differentials that fit 2009 Mercury Mountaineers, the following parts are the top sellers:

What’s the price range for 2009 Mercury Mountaineer Differentials?

The prices of Differentials for the 2009 Mercury Mountaineer range from $1.29 up to $1,115.99 for the most premium parts.

What is the average price of a Differential for a 2009 Mercury Mountaineer?

The average price for Differentials for the 2009 Mercury Mountaineer is $197.13. 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 Mountaineer model years?

Yes, we carry Differentials for 12 model years of Mercury Mountaineers between 1997 and 2010. The following model years are the most popular for Differential purchases: 2010, 2008, 2007, 2006, 2005, 2004, 2003, 2002, and 2001.

What are the cheapest Differentials for my 2009 Mercury Mountaineer?

The cheapest 2009 Mercury Mountaineer Differentials we carry are:

Does Advance Auto Parts sell Differentials for any other 2009 Mercury models?

Yes. We stock Differentials for 3 other popular 2009 Mercury models. Some of the most popular are 2009 Grand Marquis Differentials, 2009 Sable Differentials, 2009 Mariner Differentials, and 2009 Milan Differentials.

What types of Differentials do you sell for my 2009 Mercury Mountaineer?

As of 8/2/26, these are some of the most in-demand types of Differentials for a 2009 Mercury Mountaineer:

Can I get help with 2009 Mercury Mountaineer 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 Mountaineer Differentials?

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