1977 Mercury Grand Marquis Differentials

Essential 1977 Mercury Grand Marquis Differentials

Yukon Gear – Cross Pin Bolt (Part No.33067)

Cross Pin Bolt

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$6.99
Cross pin bolt for Chrysler 8.25″, 9.25″ rear, Ford 7.5″, 8.8″, GM 12 bolt car & truck, 7.2″ IFs, 7.5″, 7.6″, 8.0″, 8.25″ IFS & 8.5″.

Product Features:
  • Cross pin bolt for Chrysler 8.25″ and 9.25″ rear, Ford 7.5″ and 8.8″, GM 12 botl car and truck, 8.5″, 8.25″ IFS, 8.0″, 7.625″, 7.5″ and 7.2″ IFS
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Yukon Gear – Forged Yoke For Ford 9" With 35 Spline Pinion And A 1350 U/Joint Size (Part No.41065)

Forged Yoke For Ford 9" With 35 Spline Pinion And A 1350 U/Joint Size

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$209.99
Yukon forged yoke for Ford 9″ with 35 spline pinion and 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 9″
  • 35 spline
  • 1350 u-joint size
  • 3.625″ snap ring span
  • 1.188″ cap diameter
  • Outside snap ring design
  • U-bolt style
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FAG US – TAPERED ROLLER BEARI (Part No.KT47)

TAPERED ROLLER BEARI

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$28.99
TAPERED ROLLER BEARI

Pro-King – Differential Bearing Cone (Part No.742G255)

Differential Bearing Cone

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$19.79
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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Yukon Gear – 8.8" Ford Low Profile Ta HD Aluminum Rear Cover (Part No.32114)

8.8" Ford Low Profile Ta HD Aluminum Rear Cover

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$419.99
8.8″ Ford low profile TA HD Aluminum rear Cover. This cover will not fit vehicles with independent rear suspension.

Product Features:
  • Fits Ford 8.8″
  • Aluminum girdle cover
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National – Multi Purpose Seal (Part No.7044NA)

Multi Purpose Seal

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$15.79
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:
  • Low swell in hydrocarbon fluids
  • Design type: spring loaded; multi-lip
  • Provides good low temperature capability
  • Temperature range: -40°F to 225°F; -40°C to 107°C
  • Delivers quality and reliable performance for every type of repair
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Yukon Gear – Standard Open Spider Gear Kit For 9" Ford With 31 Spline Axles And 2-Pinion Design (Part No.16033)

Standard Open Spider Gear Kit For 9" Ford With 31 Spline Axles And 2-Pinion Design

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$301.99
Yukon standard open spider gear kit for 9″ Ford with 31 spline axles and 2-pinion design. 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
  • Fits Ford 9″ open differential with 31 spline axles
  • Includes two side gears, two pinion gears, cross pin shaft, roll pin and spider gear thrust washers.
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Yukon Gear – 9" Ford HD 6061 Aluminum Pinion Support (Part No.32162)

9" Ford HD 6061 Aluminum Pinion Support

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$215.99
9″ Ford HD 6061 aluminum pinion support, Daytona, PLAIN-SILVER, NO races.

Product Features:
  • Fits Ford 9″ with 28 spline pinion
  • Larger inner pinion bearing reduces gear deflection under high load
  • 6061 aluminum
  • Does not include races
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Royal Purple – MaxGear SAE 75W140 High Performance Gear Oil w/Friction Modifier Additive, 1 QT (Part No.01301)

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

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$25.99
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.

Product Features:
  • Maximizes horsepower
  • Extends gear and bearing life
  • Reduces operating temperature
  • Lower coefficient of friction
  • Superior corrosion protection
  • Separates rapidly from water
  • For use with open, limited-slip and locking differential
  • Contains limited-slip friction modifier
  • Made in USA
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Yukon Gear – Pinion Install Kit For Ford Daytona 9" Differential (Part No.13045)

Pinion Install Kit For Ford Daytona 9" Differential

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$284.99
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″ with Daytona pinion support
  • Included are pinion bearings and races, pinion seal, pinion nut, crush sleeve, complete pinion shim kit, and marking compound with brush.
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Yukon Gear – One (1) Specialty Bearing Race To Adapt Small Bearing Journal Into A 3.250" Dropout (Part No.32157)

One (1) Specialty Bearing Race To Adapt Small Bearing Journal Into A 3.250" Dropout

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$51.99
One (1) specialty bearing race to adapt small bearing journal into a 3.250″ dropout. This adapter allows the use of a 28 or 31 spline carrier, positraction or locker in a 3.250″ dropout. This is a perfect solution if you are currently running 28 or 31 spline axles but are looking to upgrade to 35 spline later, or are stepping down from 35 spline but don’t want to buy a new dropout.

Product Features:
  • Carrier race
  • Fits Ford 9″
  • Conversion race to install small bearing carrier into 3.250″ dropout
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Yukon Gear – Spider Gear Kit For Ford 8.8", 31 Spline, Trac Loc Posi (Part No.16106)

Spider Gear Kit For Ford 8.8", 31 Spline, Trac Loc Posi

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$363.99
Yukon spider gear kit for Ford 8.8″, 31 spline, Trac Loc posi. 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. This kit does not include cross pin shaft or clutches.

Product Features:
  • Spider gear kit
  • Fit Ford 8.8″ Trac Loc positraction with 31 spline axles
  • Includes two side gears, two pinion gears, cross pin shaft, cross pin bolt and spider gear thrust washers.
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Yukon Gear – 3.062" Side Adjuster For Ford 9" (Part No.32139)

3.062" Side Adjuster For Ford 9"

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$94.99
3.062″ side adjuster, Only Fits Yukon Ford 9″ Drop Out, new design ONLY.

Product Features:
  • Side adjuster
  • Fits Ford 9″
  • 3.062″ designs only
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Yukon Gear – Standard Open Side Gear And Thrust Washer For 7.5" Ford (Part No.33295)

Standard Open Side Gear And Thrust Washer For 7.5" Ford

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$19.99
Standard Open side gear thrust washer for 7.5″ Ford.

Product Features:
  • Side gear thrust washer
  • Fits Ford 7.5″
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Yukon Gear – Cover Bolt For Ford 7.5", 8.8" & 9.75" (Part No.33554)

Cover Bolt For Ford 7.5", 8.8" & 9.75"

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$6.99
Yukon 1541H alloy replacement rear axle for Dana 60, 70, and 80, 35 spline. (40″ to 43.5″) Full float axle (8×3.96″ ). Yukon 1541H alloy axles offer a strength increase over stock while retaining a low cost. Yukon 1541H alloy rear axles come with a one year warranty against manufacturing defects. This is a full-floating axle.

Product Features:
  • 35 spline
  • 8 x 3.96″ bolt pattern
  • Cut to length design fits 40″-43.5″ applications
  • Fits Dana Spicer 60, 70 and 80
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Dorman – Differential Clutch Kit (Part No.697-780)

Differential Clutch Kit

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$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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Yukon Gear – Extra HD 3.062" Nodular Iron Dropout For Ford 9" (Part No.32099)

Extra HD 3.062" Nodular Iron Dropout For Ford 9"

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$615.99
Yukon Extra HD 3.062″ nodular Iron dropout for Ford 9″. Yukon nodular iron dropouts feature a 5/8″ cap bolt and forged caps for maximum strength. Rated up to 1200HP!

Product Features:
  • Fits Ford 9″
  • 3.062″ carrier race diameter
  • Nodular iron for added strength
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USA Standard Gear – Master Overhaul Kit for the Ford 9" LM603011 Differential (Part No.37036)

Master Overhaul Kit for the Ford 9" LM603011 Differential

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$226.99
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.

Product Features:
  • Fits Ford 9″ with LM603011 carrier races
  • 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, thread locker, marking compound with brush and gasket.
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Yukon Gear – Super Carrier Shim Kit For Ford 8.8", GM 12 Bolt Car & Truck, 8.6 & Vette (Part No.55002)

Super Carrier Shim Kit For Ford 8.8", GM 12 Bolt Car & Truck, 8.6 & Vette

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$59.99
Product Features:
  • Super carrier shim kit for Ford 8.8″, GM 12 bolt passenger car and truck, GM 8.0″, 8.6″, 8.6″ IRS and 1963-1979 Corvette
  • Interlocking design makes installation much easier
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Dorman – Help – Pinion Crush Sleeves (Part No.81056)

Pinion Crush Sleeves

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$5.99
This differential crush sleeve is designed to match the fit and function of the original sleeve on specified vehicles, and is engineered for durability and reliable performance.

Product Features:
  • Direct replacement – this differential crush sleeve is designed to match the fit and function of the original sleeve on specified vehicles.
  • Required replacement – when servicing the differential
  • 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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Yukon Gear – Grizzly Locker, Ford 8.8" With 28 Splines (Part No.28034)

Grizzly Locker, Ford 8.8" With 28 Splines

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$1136.99
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 28 spline axles
  • Patented internal design reduces common locker failures
  • 8620 internals for added strength
  • Assembled in the USA
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Yukon Gear – Trac Loc Ring Gear Bolt Washer For 8" And 9" Ford (Part No.33245)

Trac Loc Ring Gear Bolt Washer For 8" And 9" Ford

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$3.99
Trac Loc ring gear bolt washer for 8″ and 9″ Ford.

Product Features:
  • Ring gear bolt for Ford 8″ and 9″
  • For Trac Loc positraction applications only
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Yukon Gear – Super Carrier Shim Kit For Ford 7.5", GM 7.5", 8.2" & 8.5" (Part No.55001)

Super Carrier Shim Kit For Ford 7.5", GM 7.5", 8.2" & 8.5"

from

$59.99
Product Features:
  • Super carrier shim kit for Ford 7.5″, GM 7.5″, 7.625″, 7.6″ IFS, 7.6″ IRS, 7.75″, 8.2″, 8.2″ Buick, Oldsmobile and Pontiac and GM 8.5″ front and rear
  • Interlocking design makes installation much easier
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Yukon Gear – Bearing Race Driver (Part No.56023)

Bearing Race Driver

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$219.99
Bearing race driver. No return.

Product Features:
  • Bearing race driver
  • Fits M88010 race
  • All steel construction
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Yukon Gear – Adjuster Lock Bolt 3.062" & 3.250" Ford 9" Drop Out (Part No.32149)

Adjuster Lock Bolt 3.062" & 3.250" Ford 9" Drop Out

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$3.99
Adjuster lock bolt 3.062″ & 3.250″ Yukon Ford 9″ Drop Out.

Product Features:
  • Side adjuster lock bolt
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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 – Trac Loc For Ford 9" Wtih 31 Spline Axles – Street Design (Part No.26010)

Trac Loc For Ford 9" Wtih 31 Spline Axles - Street Design

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$789.99
The Yukon Dura Grip provides aggressive yet smooth traction to give you the confidence & performance you need. Get longer life and better traction with the heavy duty Yukon Dura Grip Positraction. The Yukon Trac Loc uses a nodular case, billet side hat, and forged internals for higher strength than stock Trac-Locs. The units use composite clutches for high performance and long life. All units are Rebuildable. Yukon offers a one year warranty against manufacturing defects.

Product Features:
  • Fits Ford 9″ with 31 spline axles
  • Trac Loc positraction
  • Clutch style positraction
  • Street design
  • Internal gears are manufactured using forged 4320 steel and cut to provide stronger teeth
  • Fully rebuildable
  • Assembled in the USA
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Yukon Gear – Trac Loc Positraction, Ford 8.8", 31 Spline (Part No.20069)

Trac Loc Positraction, Ford 8.8", 31 Spline

from

$719.99
Product Features:
  • Trac Loc positraction
  • Fits Ford 8.8″ with 31 spline axles
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Popular 1977 Mercury Grand Marquis Differentials Categories

1977 Mercury Grand Marquis Differentials

Maybe you’re in the middle of a full rebuild of that 1977 Mercury Grand Marquis. Maybe you just need a couple of Differentials. Either way, Advance Auto Parts has 392 different Differentials in our inventory ranging from $1.99 to $1,566.99. That means you can find the exact parts or products you need to keep that 1977 Mercury Grand Marquis running smoothly.

Differentials are only as good as their brand. We stock 11 different brands to make sure you have plenty of trusted parts to choose from for your 1977 Mercury Grand Marquis. Yukon Gear, National, and Driveworks 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 1977 Mercury Grand Marquis, but don’t take our word for it – read our customer ratings and reviews and buy with confidence. Out of the 46 reviews in this category, some of the top rated parts include No-Slip Traction System with 5.0 stars and Differential Pinion Nut with 4.0 stars.

So if you’re in the market for aftermarket Differentials to keep your 1977 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 1977 Mercury Grand Marquis Last

Simple repair, complete replacement, or a full rebuild. No matter the job, your 1977 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 Felpro Differentials

We carry Felpro parts in our stock across Automatic Transmission Differential Cover Gaskets categories, plus more. For a 1977 Mercury Grand Marquis, our most popular Felpro Differentials include:
Differential Carrier Gasket
from $8.49
(9)
Differential Carrier Gasket
Automatic Transmission Differential Cover Gaskets

Top 1977 Mercury Grand Marquis Differentials from National

National products are another trusted brand when it comes to Differentials for your 1977 Mercury Grand Marquis. Popular National parts include:
Bearings
from $23.99
(7)
Bearings
Front Differential Pinion Bearings
Multi Purpose Seal
from $15.79
(3)
Multi Purpose Seal
Differential Pinion Seals

FAQs for 1977 Mercury Grand Marquis Differentials

What are the most purchased Differentials for the 1977 Mercury Grand Marquis?

Out of 392 Differentials for the 1977 Mercury Grand Marquis, the most popular in our inventory are:
3 Qt - 80W90 Conventional Gear Oil With Posi Additive
from $57.99
This product is not rated
3 Qt – 80W90 Conventional Gear Oil With Posi Additive
Differential Oil
Oil Seal
from $4.79
(1)
Oil Seal
Differential Pinion Seals
Cover Bolt For Ford 7.5", 8.8" & 9.75"
from $6.99
This product is not rated
Cover Bolt For Ford 7.5", 8.8" & 9.75"
Differential Cover Bolts

What are the top-rated 1977 Mercury Grand Marquis Differentials?

Top-rated Differentials for your 1977 Mercury Grand Marquis based on customer reviews/ratings are:
No-Slip Traction System
from $551.99
(1)
No-Slip Traction System
“Installed, no issues, works great.”
Differential Pinion Nut
from $6.49
(1)
Differential Pinion Nut
“If a pinion nut is ever removed from the pinion shaft, it is recommended NOT to reuse it. Replace it with a BRAND NEW nut, even if the old nut is rel”
Oil Seal
from $4.29
(1)
Oil Seal
“this seal clams to be for the ford 9 in but it is way to big”