1999 Mercury Mountaineer Differentials

Find your specific 1999 Mercury Mountaineer original or aftermarket Differentials below. Order your parts online and have delivered to your home or pick up in-store at Advance Auto.

Essential 1999 Mercury Mountaineer Differentials

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$246.99

Yukon forged yoke for Ford 8.8″ with a 1350 U/joint size (stronger than billet). 3.625″ snap ring span, 1.188″ cap diameter. Outside snap ring. All Yukon yokes come with a one year warranty against manufacturing defects.

Product Features:

Fits Ford 8.8″
30 spline
1350 u-joint size
Outside snap ring design
3.625″ snap ring span
1.188″ cap diameter
U-bolt style

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$10.99

Dana 25, Dana 27, & Dana 30 side gear Thrust washer.

Product Features:

Side gear thrust washer for Dana Spicer 25, 27, 30 and AMC Model 35
1.560″ I.D.
Fits standard open differentials only

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$44.99

Product Features:

Spring kit for Dana Spicer 28, AMC Model 35 IFS, Dana Spicer 44 IFS and Dana Spicer 50 IFS
Allows for installation of positraction or locker

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$155.99

Yukon replacement standard open spider gear kit for Dana 30 with 27 spline axles and with or without quick disconnect. Yukon uses higher quality materials and better techniques than OEM to ensure a longer lasting spider gear set. All components come with a one year warranty against manufacturing defects.

Product Features:

Spider gear kit
Fit Dana Spicer 30 open differential with 27 spline axles
Includes two side gears, two pinion gears, cross pin shaft, roll pin and spider gear thrust washers.

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$10.49

Product Features:

SOLID SPACER FORD 8.8″ & 9″

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$1481.99

Remanufactured Rear Axle assemblies are completely disassembled, thoroughly cleaned and reassembled using new wear parts. Units are assembled, sealed & include backing plates, axle shafts & fluid.

Product Features:

Rear axles are assembled with backing plates & axle shafts, and filled with fluid prior to shipping
Axles are fully painted & shipped securely in environmentally safe and recyclable containers that are the perfect size for returning your original core
Our complete Rear axle assemblies mean you just hang brakes, connect suspension & go! Your installation will be simple and trouble free
Remember to match axle ratio to original. For 4WD rear axle must match front axle ratio

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$9.99

5/16″-18 cover bolt, Dana Spicer 25, 27, 30 and 44, AMC Model 20 and Model 35, Chrysler 9.25 rear, GM 7.5″, 7.625″, 8.2″, 8.5″, 12 bolt passenger car and truck.

Product Features:

Cover bolt for Dana Spicer 25, 27, 30 and 44, AMC Model 20 and Model 35, GM 7.5″, 7.625″, 8.2″, 8.5″ and 12 bolt passenger car and truck.
1/2″ head

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$115.99

National Oil Seals & Bearings offer a full line of premium oil seals and bearings.

Product Features:

Spindle bearing and seal kit
Includes all components required to complete the repair
Controlled heat treating process for lasting performance and extended bearing life
Industry leading coverage
Professional technicians know they can depend on National

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$269.99

B&M Cast Aluminum Differential Covers are designed to strengthen the differential by preventing case distortion and ring gear & bearing cap deflection. Constructed of A356.0-T6 aluminum, these rugged covers significantly increase the fluid capacity and dissipate heat much faster than the stock factory unit to prolong the life of your ring and pinion gears. Additional features include an engraved B&M logo, drain and fill port locations, a magnetic drain plug for catching ferrous metal particles, and complete hardware and installation instructions.

Product Features:

Additional Oil Capacity
More Cooling Ability
No Dipstick Modification
Some Include Fluid Pickup Extension
Built-In Drain Plugs
Cast Aluminum

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$1.99

Product Features:

Ford 7.5″, 8.8″ Ring Gear Bolt

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$6.99

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 t

Product Features:

Pinion nut for Dana Spicer 25, 27, 30, 44, 50 and GM 7.75″
3/4″ x 16 thread

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$11.99

Pinion gear thrust washer (0.875″ shaft) for 8.8″ Ford.

Product Features:

Pinion gear thrust washer for Ford 8.8″
0.875″ diameter cross pin shaft applications only

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$35.99

Product Features:

MINI INSTALL KIT FORD 8.8

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$24.43

SKF’s advanced PTFE oil seal offers optimum performance in extreme temperature and fluid environments. Other benefits of this seal include; reduced friction, longer service life, easier assembly, reduced weight and compact design.

Product Features:

Machined rubber sealing edge provides greater accuracy and consistency, as well as a better sealing surface.
The flanged design allows for easier and proper installation and helps avoid cocking.
The latex bore coat seals the outer diameter leak path and helps compensate for minor bore imperfections.
Extra dust lip helps keep harmful contaminants, such as dirt, out of the bearing and protects against rust and corrosion.

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$2.79

Pro-King is the leading supplier of transmission and driveline products in the aftermarket.

Product Features:

All products are designed to meet or exceed OE quality, form, fit and funtion.

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$774.99

Yukon Trac Loc positraction, Ford 8.8″, 31 spline, with Carbon Fiber clutches.

Product Features:

Trac Loc positraction carrier case
Includes spider gears
Fits Ford 8.8″ with 31 spline axles
Carbon fiber clutches

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$207.99

8.8″ Ford TracLoc (with long ears–for early models only) clutch set, both sides.

Product Features:

Clutch kit
Fit Ford 8.8″ Trac Loc positraction

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$689.99

The Yukon carrier bearing Puller works with an impact gun to quickly and safely remove carrier bearings without damaging them. This unit comes with a handy bench top stand and works with up to most standard one ton applications. This unit is works with differentials up to one-ton applcations. It is not compatible with Dana 70HD, Dana 80, 10.25″ & 10.5″ Ford, or GM & Chrysler 11.5″ differentials.

Product Features:

Carrier bearing puller
Works with an impact gun to safely and easliy remove carrrier bearings
Not compatible with Dana 70HD, Dana 80, Ford 10.25″ and 10.5″ or Gm and Chrysler 11.5″ applications

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$7.49

High-quality Differential Component Shim

Product Features:

SHIM KIT FITS-8.25-F7.5-AMC20-GM0

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$239.99

Pro-King is the leading supplier of transmission and driveline products in the aftermarket.

Product Features:

All products are designed to meet or exceed OE quality, form, fit and funtion.

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$21.49

SHAFT SEAL

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$12.99

Product Features:

Cross pin shaft for Dana Spicer 30
Fits standard open differentials only

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$187.99

Product Features:

DANA-35 R/P 3.55 RATIO

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$1099.99

The Yukon Grizzly Locker is the ultimate in locking differentials for street, off-road, & drag racing. Grizzly Lockers provide 100% power to both tires, while still allowing for disengagement while negotiating turns. The Yukon Grizzly locker is a mechanical locking differential. It features a forged case and 8620 internals for maximum strength. It’s patented design reduces common locker failures. All units assembled in the USA! All Grizzly Lockers are backed by the best warranty in the business! Yukon covers the replacement unit and covers any collaterally damaged parts and associated labor, up to $2,000!

Product Features:

Fits Ford 8.8″ with 31 spline axles
Patented internal design reduces common locker failures
8620 internals for added strength
Assembled in the USA

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$32.99

National Oil Seals & Bearings offer a full line of premium oil seals and bearings.

Product Features:

Premium bearing design matches OEM specifications
Precision manufactured using premium-grade steel for outstanding durability and performance
Controlled heat treating process for lasting performance and extended bearing life
Industry leading coverage
Professional technicians know they can depend on National

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$6.99

Product Features:

Inner oil slinger for Dana Spicer 25, 27, 30, 44 and 50

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$36.99

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.

Product Features:

Steel-backed Babbitt lining material
Used in automotive and high-performance
Babbitt is designed to perform under extreme loads w/o damaging other engine parts
Babbitt is more environmentally friendly than other material
ISO & QS certified manufacturing

Popular 1999 Mercury Mountaineer Differentials Categories

Differential Oil

Rear Differential Cover Gaskets

Differential Open Unit and Components

Differential Covers

Differential Pinion Shaft Lock Bolts

Differential Bearings

Differential Pinion Flanges

Differential Axle Shafts

Differential Pinion Pilot Bearings

Differential Cover Bolts

Differential Carriers

Differential Bearing Kits

Front Differential Pinion Bearings

Differential Spider Gear Kits

Differential Rebuild Kits

Differential Carrier Shim Kits

Differential Pinion Seals

Differential Disc Kits

Differential Clutch Packs

Differential Ring and Pinions

Differential End Yokes

Rear Differential Pinion Bearings

Differential Spools

Differential Carrier Bearings

Differential Lock Springs

Rear Housing Cover Gaskets

Differential Pinion Bearing Kits

Differential Seals

Complete Differentials

Differential Ring Gear Bolts

Bearing Race Drivers

Differential Carrier Bearing Shims

Differential Crush Sleeves

Differential Side Bearing Spacers

Differential Pinion Shims

Differential Pinion Shaft Nuts

Differential Gear Install Kits

Differential Cross Pins

Differential Side Gear Thrust Washers

Differential Pinion Bearing Baffles

Differential Pinion Gear Thrust Washers

Differential Drive Pinion Oil Deflectors

Auxiliary Shaft Bearings

Limited Slip Differential Assemblies

Differential Spider and Pinion Gear Kits

Differential Pinion Bearing Spacers

Differential Carrier Bearing Races

Maybe you’re in the middle of a full rebuild of that 1999 Mercury Mountaineer. Maybe you just need a couple of Differentials. Either way, Advance Auto Parts has 231 different Differentials in our inventory ranging from $0.99 to $1,566.99. That means you can find the exact parts or products you need to keep that 1999 Mercury Mountaineer running smoothly.

Differentials are only as good as their brand. We stock 23 different brands to make sure you have plenty of trusted parts to choose from for your 1999 Mercury Mountaineer. Valvoline, FELPRO, and Dorman are just some of the brands we stock. Search for brands you know or compare prices and reviews to help you decide!

We know you’ll find the perfect Differentials for your 1999 Mercury Mountaineer, but don’t take our word for it – read our customer ratings and reviews and buy with confidence. Out of the 1,378 reviews in this category, some of the top rated parts include Rear Differential Cover with 4.4 stars and Differential Shaft Lock Bolt with 4.0 stars.

So if you’re in the market for aftermarket Differentials to keep your 1999 Mercury Mountaineer rolling for years to come, look no further. Shop online and have your products shipped direct to your door, or pick up at the nearest Advance Auto Parts location today!

Differentials Brands To Make Your 1999 Mercury Mountaineer Last

Simple repair, complete replacement, or a full rebuild. No matter the job, your 1999 Mercury Mountaineer demands trusted brand parts and products to keep it running. Many trusted brands of Differentials make up Advance Auto Parts’ inventory, and all are ready to help make your Mountaineer the best it can be. Be sure to browse some of our top Differentials brands and parts.

Popular Royal Purple Differentials

We carry Royal Purple parts in our stock across Differential Oil categories, plus more. For a 1999 Mercury Mountaineer, our most popular Royal Purple Differentials include: