1981 Mercury Grand Marquis Differentials

Essential 1981 Mercury Grand Marquis Differentials

Yukon Gear – Master Overhaul Kit For ’09 & Down Ford 8.8" Differential (Part No.14050)

Master Overhaul Kit For '09 & Down Ford 8.8" Differential

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$289.99
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. Includes Supershims.

Product Features:
  • Fits 2009 and down Ford 8.8″
  • 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.
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USA Standard Gear – Standard Spider Gear Set For Ford 8.8", 31 Spline (Part No.39016)

Standard Spider Gear Set For Ford 8.8", 31 Spline

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$209.99
Product Features:
  • Spider gear kit
  • Fits Ford 8.8″ 31 spline open differential
  • Includes two side gears, two pinion gears, cross pin shaft, cross pin bolt and spider gear thrust washers.
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Yukon Gear – Bearing Race Driver (Part No.56020)

Bearing Race Driver

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$215.99
Bearing race driver. No return.

Product Features:
  • Bearing race driver
  • Fits M802011 race
  • All steel construction
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Pro-King – Differential Internal Nest Kit (Part No.762B717)

Differential Internal Nest Kit

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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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National – Bearings (Part No.LM102910)

Bearings

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$6.99
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
  • Crowned raceways and rollers to ensure even load distribution for maximum life
  • Industry leading coverage
  • Professional technicians know they can depend on National
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Yukon Gear – DiffrlCover (Part No.32364)

DiffrlCover

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$99.99
DiffrlCover

Yukon Gear – Set Up Bearing (Part No.56045)

Set Up Bearing

from

$153.99
M802048 set-up bearing (one bearing). No return.

Product Features:
  • Set up bearing
  • Fits M802048 pinion bearing
  • Easily slips on and off pinion journal to allow for easier pinion depth adjustment
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Yukon Gear – Pinion Install Kit For Ford 9" Differential (Part No.13042)

Pinion Install Kit For Ford 9" Differential

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$175.99
Yukon Pinion installation kits are a terrific solution for gear installation on lower mileage vehicles where the carrier bearings & races can be reused. This kit uses Timken bearings and races along with a high quality pinion seal and small parts. Included in this kit are the pinion bearings and races, pilot bearing (if applicable), crush sleeve (if applicable), complete pinion shim kit, pinion nut, thread locker, and marking compound with brush. Yukon does extensive research for each application to make sure your kit will arrive with all the correct parts you need to install your pinion gear.

Product Features:
  • Fits Ford 9″ without aftermarket Daytona pinion support
  • Included are pinion bearings and races, pinion seal, pilot bearing , crush sleeve , complete pinion shim kit, and marking compound with brush.
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Yukon Gear – Outer Oil Slinger For Ford 7.5", 8.8", 9", 10.25" (Part No.33022)

Outer Oil Slinger For Ford 7.5", 8.8", 9", 10.25"

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$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.

Product Features:
  • Outer oil slinger for Ford 10.25″, 7.5″, 8.8″ and 9″ also Jeep JK and Nissan Titan rear
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Yukon Gear – 8" & 9" Ford 4-Tab Clutch Kit With 9 Pieces (Part No.16029)

8" & 9" Ford 4-Tab Clutch Kit With 9 Pieces

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$187.99
8″ & 9″ Ford 4-Tab clutch kit with 9 pieces (late TracLoc).

Product Features:
  • Clutch kit
  • Fits Ford 8″ and 9″ Trac Loc positraction
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Yukon Gear – Short Yoke For Ford 9" With 28 Spline Pinion And A 1310 U/Joint Size (Part No.41054)

Short Yoke For Ford 9" With 28 Spline Pinion And A 1310 U/Joint Size

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$121.99
Yukon short yoke for Ford 9″ with 28 spline pinion and a 1310 U/joint size. 3.219″ snap ring span, 1.062″ cap diameter. Outside snap ring. 4″ length. All Yukon yokes come with a one year warranty against manufacturing defects.

Product Features:
  • Fits Ford 9″
  • 28 spline
  • 1310 u-joint size
  • 3.219″ snap ring span
  • 1.062″ cap diameter
  • Outside snap ring design
  • U-bolt style
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Yukon Gear – Carrier Installation Kit For Ford 8.8" Differential (Part No.57007)

Carrier Installation Kit For Ford 8.8" Differential

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$134.99
Yukon Carrier installation kits are great, low cost kit for carrier changes such as Positraction or locker upgrades. Carrier installation kit for Ford 8.8″ differential. This kit contains carrier bearings, races and shims.

Product Features:
  • Fits Ford 8.8″
  • Includes carrier bearings and races and “super” carrier shim kit
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Motive Gear – Differential Gear Install Kit (Part No.F7.5IK)

Differential Gear Install Kit

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$35.49


Product Features:
  • MINI INSTALL KIT FORD 7.5
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Yukon Gear – Redline Synthetic "Shock Proof" Oil With Positraction Additive – 4 Quarts (Part No.15005)

Redline Synthetic "Shock Proof" Oil With Positraction Additive - 4 Quarts

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$148.99
Redline Synthetic “Shock Proof” Oil with positraction Additive. 4 Quarts.

Product Features:
  • Includes four quarts of Redline Shockproof oil and one 4oz bottle of Yukon positraction additive
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Dorman – Differential Clutch Kit (Part No.697-780)

Differential Clutch Kit

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.

Product Features:
  • Direct replacement – this differential clutch kit provides the necessary components for repairing the original equipment on specific vehicles
  • Quality materials – all components are built for reliable longevity and performance
  • Smart solution – provides original equipment fit and function for a competitive price compared to original manufacturer
  • Trustworthy quality – backed by team of designers and engineers in the United States
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Motive Gear – Differential Pinion Solid Spacer Kit w/Shims (Part No.4105)

Differential Pinion Solid Spacer Kit w/Shims

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$22.79


Product Features:
  • FORD 9″ SOLID SPACER KIT
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Felpro – Differential Cover Gasket (Part No.RDS 55393)

Differential Cover Gasket

from

$6.49
Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design to ensure a perfect fit
  • Unsurpassed quality you can trust
  • Validated for fit, form and function
  • Each Fel-Pro gasket, no matter how small, is engineered to exacting standards with proprietary design, engineering and manufacturing processes
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Yukon Gear – Grizzly Locker For Ford 9" With 35 Spline Axles (Part No.28011)

Grizzly Locker For Ford 9" With 35 Spline Axles

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$946.99
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! This locker also fits 9.5″ & 10″ dropouts.

Product Features:
  • Fits Ford 9″ with 35 spline axles
  • Patented internal design reduces common locker failures
  • 8620 internals for added strength
  • Assembled in the USA
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Motive Gear – Differential Pinion Shim Kit (Part No.WAA4663)

Differential Pinion Shim Kit

from

$15.99
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 – Copper Washer For Ford 9" & 8" Dropout Housing (Part No.32339)

Copper Washer For Ford 9" & 8" Dropout Housing

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$5.99
Product Features:
  • Copper washer
  • Fits Ford 8″ and 9″
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Dorman – Help – Differential Shaft Lock Bolt (Part No.81048)

Differential Shaft Lock Bolt

from

$5.99
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:
  • 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
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USA Standard Gear – 9" Ford Spartan Locker Cross Pin, Short (Part No.17022)

9" Ford Spartan Locker Cross Pin, Short

from

$26.99
9″ Ford Spartan locker cross pin, short.

Product Features:
  • USA Standard Gear heavy-duty cross pin shaft
  • Fits Ford 9″
  • Works with Spartan Locker or standard open spider gears
  • Short shaft for four pinion designs
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Yukon Gear – Minor Install Kit For Ford 8.8" Differential (Part No.12035)

Minor Install Kit For Ford 8.8" Differential

from

$62.99
Yukon Minimum installation kits are a low cost solution for gear changes in newer vehicles where the bearings can be reused. This kit uses all high quality components to ensure a smooth set up. kit includes a pinion seal, crush sleeve (if applicable), complete shim kit, marking compound and brush. (Includes Supershims).

Product Features:
  • Fits Ford 8.8″
  • Included are a pinion seal, crush sleeve , complete shim kit, marking compound and brush.
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USA Standard Gear – Spartan Locker For Ford 9", 28 Or 31 Spline (Part No.17042)

Spartan Locker For Ford 9", 28 Or 31 Spline

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.

Product Features:
  • Fits Ford 8″ and 9″ with 28 or 31 spline axles
  • Made from 9310 steel for added strength
  • Works with stock side gears in standard carrier case
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Yukon Gear – Pilot Bearing For Ford 9" (Part No.18042)

Pilot Bearing For Ford 9"

from

$38.99
8.6″ GM 99-08 PINION Bearing & SEAL KIT .

Product Features:
  • Pilot bearing
  • Fits Ford 9″
  • 0.656″ thick
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Yukon Gear – Crush Sleeve Eliminator Kit For Ford 9" For 35 Spline Pinion (Part No.55042)

Crush Sleeve Eliminator Kit For Ford 9" For 35 Spline Pinion

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$175.99
9″ large solid pinion preload spacer & shim kit for 35 spline pinion.

Product Features:
  • Crush sleeve eliminator kit for Ford 9″ with 35 spline pinion
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Yukon Gear – Standard Open & Tracloc Pinion Gear And Thrust Washer For 7.5" Ford (Part No.33296)

Standard Open & Tracloc Pinion Gear And Thrust Washer For 7.5" Ford

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$10.99
Standard Open & TracLoc pinion gear thrust washer for 7.5″ Ford.

Product Features:
  • Pinion gear thrust washer
  • Fits Ford 7.5″
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USA Standard Gear – Ring & Pinion Gear Set For Ford 7.5" In A 3.73 Ratio (Part No.36114)

Ring & Pinion Gear Set For Ford 7.5" In A 3.73 Ratio

from

$299.99
USA Standard ring & pinion sets are the right choice to add confidence to your install. USA Standard Gear offers a full line of ring & pinion sets for a variety of common & hard to find applications. USA standard gear offers a standard one year warranty against defects on their ring & pinion sets.

Product Features:
  • Fits Ford 7.5″
  • 7.50″ ring gear diameter
  • 28 spline pinion
  • 10 ring gear bolts
  • 3.73 ratio
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1981 Mercury Grand Marquis Differentials

Maybe you’re in the middle of a full rebuild of that 1981 Mercury Grand Marquis. Maybe you just need a couple of Differentials. Either way, Advance Auto Parts has 194 different Differentials in our inventory ranging from $0.99 to $1,099.99. That means you can find the exact parts or products you need to keep that 1981 Mercury Grand Marquis running smoothly.

Differentials are only as good as their brand. We stock 12 different brands to make sure you have plenty of trusted parts to choose from for your 1981 Mercury Grand Marquis. Felpro, National, and Yukon Gear 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 1981 Mercury Grand Marquis, but don’t take our word for it – read our customer ratings and reviews and buy with confidence. Out of the 1,060 reviews in this category, some of the top rated parts include Bearings with 5.0 stars and Differential Master Bearing Kit – Timken with 4.0 stars.

So if you’re in the market for aftermarket Differentials to keep your 1981 Mercury Grand Marquis 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 1981 Mercury Grand Marquis Last

Simple repair, complete replacement, or a full rebuild. No matter the job, your 1981 Mercury Grand Marquis 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 Grand Marquis the best it can be. Be sure to browse some of our top Differentials brands and parts.

Popular Powertrax Differentials

We carry Powertrax parts in our stock across Differential Open Unit and Components categories, plus more. For a 1981 Mercury Grand Marquis, our most popular Powertrax Differentials include:
Lock Right Locker
from $444.99
(1)
Lock Right Locker
Differential Open Unit and Components

Top 1981 Mercury Grand Marquis Differentials from Felpro

Felpro products are another trusted brand when it comes to Differentials for your 1981 Mercury Grand Marquis. Popular Felpro parts include:
Differential Cover Gasket
from $14.99
(121)
Differential Cover Gasket
Rear Housing Cover Gaskets
Differential Cover Gasket
from $6.49
(13)
Differential Cover Gasket
Rear Housing Cover Gaskets

FAQs for 1981 Mercury Grand Marquis Differentials

What are the most purchased Differentials for the 1981 Mercury Grand Marquis?

Out of 194 Differentials for the 1981 Mercury Grand Marquis, the most popular in our inventory are:
Multi Purpose Seal
from $11.99
(28)
Multi Purpose Seal
Differential Pinion Seals
Differential Shaft Lock Bolt
from $5.99
(11)
Differential Shaft Lock Bolt
Differential Pinion Shaft Lock Bolts
3 Qt - Penzoil 80W90 Conventional Gear Oil
from $44.99
This product is not rated
3 Qt – Penzoil 80W90 Conventional Gear Oil
Differential Oil

What are the top-rated 1981 Mercury Grand Marquis Differentials?

Top-rated Differentials for your 1981 Mercury Grand Marquis based on customer reviews/ratings are:
Bearings
from $15.99
(9)
Bearings
“as advertised”
Differential Master Bearing Kit - Timken
from $137.99
(8)
Differential Master Bearing Kit – Timken
“These Timken bearings work great in my 10 second drag car.”
Bearings
from $10.49
(4)
Bearings
“Goes with M88010 bearing cup. Application was the pinion bearing race for a Ford 9 Inch on a 1957 Ford F-100.”