Mercury Comet Differential Spools

Your Mercury Comet will be happy to know that the search for the right Differential Spools you’ve been looking for is over! Advance Auto Parts has 17 different Differential Spools for your vehicle, ready for shipping or in-store pick up. The best part is, our Mercury Comet Differential Spools start from as little as $51.99.

When it comes to your Mercury Comet, you want parts and products from only trusted brands. Here at Advance Auto Parts, we work with only top reliable Differential Spools brands so you can shop with complete confidence. Some of our top Differential Spools brands are USA Standard Gear and Motive Gear. We’re sure you will get the right product to keep that Comet running for a long time.

Shop online, find the best price on the right product, and have it shipped right to your door. If you prefer to shop in person for the right Differential Spools for your Comet, visit one of our local Advance Auto Parts locations and you’ll be back on the road in no time!

Compare 21 Mercury Differential Spools

Yukon Gear – Mini Spool For Ford 8.8" With 28 Spline Axles (Part No.32225)

Mini Spool For Ford 8.8" With 28 Spline Axles

from

$218.99
Mini spools are a low-cost traction option for vehicles looking for full-time lockup. The mini spool installs into a standard open carrier and give 100% power to both tires at all times. These units are not recommended for street-driven vehicles. We recommend full spools for vehicles with large tires or high horsepower. These units come with a one year warranty against manufacturing defects.

Product Features:
  • Fits Ford 8.8″ with 28 spline axles
  • Provides 100% traction to both wheels at all times
  • Installs into standard open carrier case
See More

Motive Gear – Differential Spool (Part No.FS9-31LW)

Differential Spool

from

$149.99


Product Features:
  • FULL SPOOL 9″31SPL LIGHT WEIGHT
See More

USA Standard Gear – Mini Spool For Ford 9" With 28 Spline Axles (Part No.59022)

Mini Spool For Ford 9" With 28 Spline Axles

from

$59.99
Product Features:
  • Fits Ford 9″ with 28 spline axles
  • Installs into a standard open carrier case
  • Provides 100% traction to both wheels at all times
  • Not recommended for street driven vehicles
See More

USA Standard Gear – Mini Spool For Ford 9" With 31 Spline Axles (Part No.59023)

Mini Spool For Ford 9" With 31 Spline Axles

from

$57.99
Product Features:
  • Fits Ford 9″ with 31 spline axles
  • Installs into a standard open carrier case
  • Provides 100% traction to both wheels at all times
  • Not recommended for street driven vehicles
See More

USA Standard Gear – Spartan Locker For Ford 8.8", 31 Spline, Includes Heavy-Duty Cross Pin Shaft (Part No.17005)

Spartan Locker For Ford 8.8", 31 Spline, Includes Heavy-Duty Cross Pin Shaft

from

$649.99
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 and drivers are made from 9310 steel, for added strength. Each Spartan locker carries a one year warranty against defect.

Product Features:
  • Fits Ford 8.8″ with 31 spline axles and 7/8″ cross pin shaft
  • Made from 9310 steel for added strength
  • Replaces the spiders in a standard carrier case
See More

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
See More

Yukon Gear – Steel Spool For Ford 9" With 35 Spline Axles, Small Bearing (Part No.32098)

Steel Spool For Ford 9" With 35 Spline Axles, Small Bearing

from

$404.99
Yukon Performance steel spool for 9″ Ford with 35 spline axles. Spool uses 1.785″ journal bearings. fits 2.8″ and 3.0″ cases. Yukon performance spools are made from the highest quality materials to ensure high strength and long life in performance applications. Spools provide 100% power to both tires at all times and are a lower cost alternative to lockers. Spools are not recommended for street driven vehicles. Yukon Performance spools come with a one year warranty against manufacturing defects.

Product Features:
  • Fits Ford 9″ with 35 spline axles
  • Small bearing journal to fit 2.968″ and 3.062″ dropouts
  • Provides 100% traction to both wheels at all times
  • Not recommended for street driven vehicles
See More

Yukon Gear – Steel Spool For Ford 9" With 40 Spline Axles (Part No.32182)

Steel Spool For Ford 9" With 40 Spline Axles

from

$389.99
Yukon Performance 2-3/16″ deck steel spool for 9″ Ford with 40 spline axles. Spool uses 2″ journal bearings (45 degree). Yukon performance spools are made from the highest quality materials to ensure high strength and long life in performance applications. Spools provide 100% power to both tires at all times and are a lower cost alternative to lockers. Spools are not recommended for street driven vehicles. Yukon Performance spools come with a one year warranty against manufacturing defects.

Product Features:
  • Fits Ford 9″ with 40 spline axles
  • Provides 100% traction to both wheels at all times
  • Not recommended for street driven vehicles
See More

Yukon Gear – Steel Spool For Ford 9" With 35 Spline Axles (Part No.32047)

Steel Spool For Ford 9" With 35 Spline Axles

from

$379.99
Yukon Performance 2-3/16″ deck steel spool for 9″ Ford with 35 spline axles. Spool uses 2″ journal bearings (30 degree). Does not fit Mark Williams. Yukon performance spools are made from the highest quality materials to ensure high strength and long life in performance applications. Spools provide 100% power to both tires at all times and are a lower cost alternative to lockers. Spools are not recommended for street driven vehicles. Yukon Performance spools come with a one year warranty against manufacturing defects.

Product Features:
  • Fits Ford 9″ with 35 spline axles
  • Provides 100% traction to both wheels at all times
  • Not recommended for street driven vehicles
See More

Yukon Gear – Lightweight Steel Spool For Ford 9" With 31 Spline Axles (Part No.32046)

Lightweight Steel Spool For Ford 9" With 31 Spline Axles

from

$313.99
Yukon Performance 2-1/8″ deck lightweight steel spool for 9″ Ford with 31 spline axles. Spool uses 1.785″ journal bearings. Yukon performance spools are made from the highest quality materials to ensure high strength and long life in performance applications. Spools provide 100% power to both tires at all times and are a lower cost alternative to lockers. Spools are not recommended for street driven vehicles. Yukon Performance spools come with a one year warranty against manufacturing defects.

Product Features:
  • Fits Ford 9″ with 31 spline axles
  • Lightweight design
  • Provides 100% traction to both wheels at all times
  • Not recommended for street driven vehicles
See More

USA Standard Gear – Spool For Ford 9", 35 Spline (Part No.59025)

Spool For Ford 9", 35 Spline

from

$294.99
9″ FORD 35Spline SPOOL 30deg (EXCL M.WLMS) 2-3/16″ DECK , 2″ Journal .

Product Features:
  • Fits Ford 9″ with 35 spline axles
  • Provides 100% traction to both wheels at all times
  • Not recommended for street driven vehicles
See More

Yukon Gear – Steel Spool For Ford 9" With 31 Spline Axles (Part No.32045)

Steel Spool For Ford 9" With 31 Spline Axles

from

$289.99
Yukon Performance 2-1/8″ deck steel spool for 9″ Ford with 31 spline axles. Spool uses 1.785″ journal bearings. Yukon performance spools are made from the highest quality materials to ensure high strength and long life in performance applications. Spools provide 100% power to both tires at all times and are a lower cost alternative to lockers. Spools are not recommended for street driven vehicles. Yukon Performance spools come with a one year warranty against manufacturing defects.

Product Features:
  • Fits Ford 9″ with 31 spline axles
  • Provides 100% traction to both wheels at all times
  • Not recommended for street driven vehicles
See More

Richmond Gear – Differential Spool (Part No.81-0928-1)

Differential Spool

from

$259.99
Richmond Gear is the leading manufacturer of professional quality, high-performance drivetrain products. Our complete line of products ranges from high performance ring-and-pinion sets for serious street and racing applications to torque-hungry manual transmissions and components. Richmond Gear products have been winners both at the Daytona 500 and U.S. Nationals for decades. WINNERS RUN RICHMOND!

Product Features:
  • For over 80-years, the Richmond Double-Diamond logo has represented some of the highest quality gears in the racing industry. Winners Run Richmond!
  • The superior quality of Richmond gearsets is a result of outstanding design, world class manufacturing and an extensive testing process that is performed on all products.
  • Richmond performance gearsets have been winners for decades at: NHRA, NMRA, NMCA, Daytona 500, WISSOTA and U.S. Nationals.
  • Richmond Gear is a leading manufacturer of high performance ring and pinion gearsets and drivetrain components, backed by a two year warranty.
  • Engineered to perform faster and be more reliable, Richmond performance drivetrain products are the result of a continuous research and development program combined with state-of-the-art manufacturing capabilities.
See More

Richmond Gear – Differential Spool (Part No.81-0935-3)

Differential Spool

from

$259.99
Richmond Gear is the leading manufacturer of professional quality, high-performance drivetrain products. Our complete line of products ranges from high performance ring-and-pinion sets for serious street and racing applications to torque-hungry manual transmissions and components. Richmond Gear products have been winners both at the Daytona 500 and U.S. Nationals for decades. WINNERS RUN RICHMOND!

Product Features:
  • For over 80-years, the Richmond Double-Diamond logo has represented some of the highest quality gears in the racing industry. Winners Run Richmond!
  • The superior quality of Richmond gearsets is a result of outstanding design, world class manufacturing and an extensive testing process that is performed on all products.
  • Richmond performance gearsets have been winners for decades at: NHRA, NMRA, NMCA, Daytona 500, WISSOTA and U.S. Nationals.
  • Richmond Gear is a leading manufacturer of high performance ring and pinion gearsets and drivetrain components, backed by a two year warranty.
  • Engineered to perform faster and be more reliable, Richmond performance drivetrain products are the result of a continuous research and development program combined with state-of-the-art manufacturing capabilities.
See More

Yukon Gear – Mini Spool For Ford 8.8" With 31 Spline Axles (Part No.32226)

Mini Spool For Ford 8.8" With 31 Spline Axles

from

$194.99
Mini Spool for Ford 8.8″ with 31 spline axles and 7/8″ cross pin. Mini spools are a low-cost traction option for vehicles looking for full-time lockup. The mini spool installs into a standard open carrier and give 100% power to both tires at all times. These units are not recommended for street-driven vehicles. We recommend full spools for vehicles with large tires or high horsepower. These units come with a one year warranty against manufacturing defects.

Product Features:
  • Fits Ford 8.8″ with 31 spline axles
  • Provides 100% traction to both wheels at all times
  • Installs into standard open carrier case
See More

Motive Gear – Differential Spool (Part No.FS8.8-31)

Differential Spool

from

$192.99


Product Features:
  • FULL SPOOL FORD 8.8″ 31 SPL
See More

USA Standard Gear – Spool For Ford 9", 31 Spline (Part No.59004)

Spool For Ford 9", 31 Spline

from

$175.99
Product Features:
  • Fits Ford 9″ with 31 spline axles
  • Provides 100% traction to both wheels at all times
  • Not recommended for street driven vehicles
See More

Motive Gear – Differential Spool (Part No.FS9-28LW)

Differential Spool

from

$149.99


Product Features:
  • FULL SPOOL 9″, 28 SPL. LIGHTWEIGHT
See More

Motive Gear – Differential Spool (Part No.FS9-35LW)

Differential Spool

from

$149.99


Product Features:
  • FULL SPOOL FORD 9″ 35 SPL. LGT WGT
See More

Yukon Gear – Mini Spool For Ford 9" With 28 Spline Axles (Part No.32056)

Mini Spool For Ford 9" With 28 Spline Axles

from

$59.99
Mini Spool 8″ and 9″ for Ford with 28 spline axles. Cross is bored for three cross pins. Mini spools are a low-cost traction option for vehicles looking for full-time lockup. The mini spool installs into a standard open carrier and give 100% power to both tires at all times. These units are not recommended for street-driven vehicles. We recommend full spools for vehicles with large tires or high horsepower. These units come with a one year warranty against manufacturing defects.

Product Features:
  • Fits Ford 9″ with 28 spline axles
  • Installs into a standard open carrier case
  • Provides 100% traction to both wheels at all times
  • Not recommended for street driven vehicles
See More

Yukon Gear – Mini Spool For Ford 9" With 31 Spline Axles (Part No.32057)

Mini Spool For Ford 9" With 31 Spline Axles

from

$51.99
Mini Spool for Ford 9.0 with 31 spline axles. Cross is bored for three cross pins. Mini spools are a low-cost traction option for vehicles looking for full-time lockup. The mini spool installs into a standard open carrier and give 100% power to both tires at all times. These units are not recommended for street-driven vehicles. We recommend full spools for vehicles with large tires or high horsepower. These units come with a one year warranty against manufacturing defects.

Product Features:
  • Fits Ford 9″ with 31 spline axles
  • Installs into a standard open carrier case
  • Provides 100% traction to both wheels at all times
  • Not recommended for street driven vehicles
See More