1981 Mercury Cougar Performance Drivetrains

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Keep Your 1981 Mercury Cougar in Top Shape with Quality Performance Drivetrains

Whether you’re repairing or upgrading your Performance Drivetrain, using high-quality parts is key to keeping your 1981 Mercury Cougar looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Performance Ring and Pinions and Performance Posi Units and Components. 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.

Competitive Prices and Extensive Inventory

The average price for a 1981 Mercury Cougar Performance Drivetrain at Advance Auto Parts is around $326.49, with a range that starts at $209.99 and goes up to $442.99. With 2 options in stock from 2 trusted brands, finding the right fit is easy. Popular picks like Performance Differential Ring and Pinion and Lock Right Locker start at just $209.99 and offer a great balance of form and function.

Explore Related Parts

While you’re upgrading or replacing your Performance Drivetrain, don’t forget to check out other key components like Performance Distributors and Performance Fuel Systems. At Advance Auto Parts, we’re here to help you keep your 1981 Mercury Cougar in peak condition, inside and out.

Essential 1981 Mercury Cougar Performance Drivetrains

Richmond Gear – RngPnn (Part No.69-0382-1)

RngPnn

from

$369.99
RngPnn

Motive Gear – Performance Differential Ring and Pinion (Part No.F888488)

Performance Differential Ring and Pinion

from

$248.99


Product Features:
  • FRD 10BLT 8.8 R/P 4.88 MGP
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Motive Gear – PRO Gear Lightweight Differential Ring And Pinion – Small Pinion (Part No.F990543SP)

PRO Gear Lightweight Differential Ring And Pinion - Small Pinion

from

$441.99


Product Features:
  • R&P FORD 9″ 5.43, 9310 SMALL PIN 28 SPL. PRO
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Motive Gear – Performance Differential Ring and Pinion (Part No.F890543)

Performance Differential Ring and Pinion

from

$225.99


Product Features:
  • FRD 10BLT 9.0 R/P 5.43 MGP
See More

Motive Gear – Performance Differential Ring and Pinion (Part No.F888430)

Performance Differential Ring and Pinion

from

$239.99


Product Features:
  • R&P FORD 8.8 430 RR TOOTH COUNT 43-10
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Richmond Gear – RngPnn (Part No.69-0376-1)

RngPnn

from

$359.99
RngPnn

Motive Gear – Performance Differential Ring and Pinion (Part No.F890370)

Performance Differential Ring and Pinion

from

$251.99


Product Features:
  • FRD 10BLT 9.0 R/P 3.70 MGP
See More

Richmond Gear – RngPnn (Part No.F9567)

RngPnn

from

$185.99
RngPnn

Motive Gear – Performance Differential Ring and Pinion (Part No.F888410)

Performance Differential Ring and Pinion

from

$230.99


Product Features:
  • FRD 10BLT 8.8 R/P 4.10 MGP
See More

Richmond Gear – RngPnn (Part No.69-0288-1)

RngPnn

from

$379.99
RngPnn

Motive Gear – Performance Differential Ring and Pinion (Part No.F888355)

Performance Differential Ring and Pinion

from

$229.99


Product Features:
  • FRD 10BLT 8.8 R/P 3.55 MGP
See More

Richmond Gear – RngPnn (Part No.F9500)

RngPnn

from

$191.99
RngPnn

Richmond Gear – RngPnn (Part No.F9600)

RngPnn

from

$185.99
RngPnn

Motive Gear – Performance Differential Ring and Pinion (Part No.F890430)

Performance Differential Ring and Pinion

from

$246.99


Product Features:
  • FRD 10BLT 9.0 R/P 4.30 MGP
See More

Motive Gear – Differential Mini Spool (Part No.MS9-31)

Differential Mini Spool

from

$31.99


Product Features:
  • MINI SPOOL 8″ & 9″ 31 SPLN STL 090431
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Powertrax – Lock Right Locker (Part No.1820-LR)

Lock Right Locker

from

$442.99
The Powertrax Lock-Right ultra-strength alloy locker’s straight-line performance is equal to a solid spool, but automatically unlocks in turns. Best suited for extreme off-road to severe on-road use, Powertrax Lock Right lockers replace the spider gears in your open differential carrier using basic tools and without affecting your ring and pinion settings. The whole job can be done in your driveway in a couple of hours, pin included! 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!The Powertrax® Lock-Right Locker provides outstanding traction for off-road machines and race vehicles. Powertrax No-Slip Traction Systems deliver excellent performance to street-driven cars and trucks.
  • Powertrax® lockers range from the original, Lock-Right for serious straight-line performance, to the No-Slip traction system for street-able vehicles.
  • Powertrax® offers three levels of GRIP locking differentials, ranging from the clutch-type GRIP LS with a forged steel case, the gear-driven GRIP PRO and finally the GRIP LOK for extreme traction.
  • Powertrax® = Extreme Traction Systems!
  • See More

    Motive Gear – Differential Mini Spool (Part No.MS88-31)

    Differential Mini Spool

    from

    $101.99


    Product Features:
    • MINI SPOOL 8.8 FORD 31SPL
    See More

    Richmond Gear – MiniSpool (Part No.78-8831-1)

    MiniSpool

    from

    $151.99
    MiniSpool

    Most Popular Performance Ring and Pinion for 1981 Mercury Cougars

    Enhance your 1981 Mercury Cougar with this popular Performance Ring and Pinion we have in stock, for $209.99.

    Motive Gear – Performance Differential Ring and Pinion (Part No.F875456)

    Performance Differential Ring and Pinion

    from

    $209.99


    Product Features:
    • FRD 10BLT 7.5 R/P 4.56 MGP
    See More

    Best-Selling 1981 Mercury Cougar Performance Posi Units and Component

    Upgrade your Cougar with our best-selling Performance Posi Units and Component.

    Powertrax – Lock Right Locker (Part No.1820-LR)

    Lock Right Locker

    from

    $442.99
    The Powertrax Lock-Right ultra-strength alloy locker’s straight-line performance is equal to a solid spool, but automatically unlocks in turns. Best suited for extreme off-road to severe on-road use, Powertrax Lock Right lockers replace the spider gears in your open differential carrier using basic tools and without affecting your ring and pinion settings. The whole job can be done in your driveway in a couple of hours, pin included! 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!The Powertrax® Lock-Right Locker provides outstanding traction for off-road machines and race vehicles. Powertrax No-Slip Traction Systems deliver excellent performance to street-driven cars and trucks.Powertrax® lockers range from the original, Lock-Right for serious straight-line performance, to the No-Slip traction system for street-able vehicles.Powertrax® offers three levels of GRIP locking differentials, ranging from the clutch-type GRIP LS with a forged steel case, the gear-driven GRIP PRO and finally the GRIP LOK for extreme traction.Powertrax® = Extreme Traction Systems!
    See More

    FAQs for 1981 Mercury Cougar Performance Drivetrains

    What are the best-selling Performance Drivetrains for 1981 Mercury Cougars?

    Out of 2 Performance Drivetrains that fit 1981 Mercury Cougars, the following parts are the top sellers:

    What’s the price range for 1981 Mercury Cougar Performance Drivetrains?

    The prices of Performance Drivetrains for the 1981 Mercury Cougar range from $209.99 up to $442.99 for the most premium parts.

    What is the average price of a Performance Drivetrain for a 1981 Mercury Cougar?

    The average price for Performance Drivetrains for the 1981 Mercury Cougar is $326.49. Keep in mind the variety of part types within our Performance Drivetrain category, where you are likely to find a wide range of prices across a variety of parts and components.

    Does Advance Auto Parts sell Performance Drivetrains for other Mercury Cougar model years?

    Yes, we carry Performance Drivetrains for 29 model years of Mercury Cougars between 1967 and 1997. The following model years are the most popular for Performance Drivetrain purchases: 1997, 1996, 1995, 1994, 1993, 1992, 1991, 1990, and 1989.

    What are the cheapest Performance Drivetrains for my 1981 Mercury Cougar?

    The cheapest 1981 Mercury Cougar Performance Drivetrains we carry are:

    Does Advance Auto Parts sell Performance Drivetrains for any other 1981 Mercury models?

    Yes. We stock Performance Drivetrains for 3 other popular 1981 Mercury models. Some of the most popular are 1981 Grand Marquis Performance Drivetrains, 1981 Capri Performance Drivetrains, 1981 Zephyr Performance Drivetrains, and 1981 Marquis Performance Drivetrains.

    What types of Performance Drivetrains do you sell for my 1981 Mercury Cougar?

    As of 3/1/26, these are some of the most in-demand types of Performance Drivetrains for a 1981 Mercury Cougar:

    Can I get help with 1981 Mercury Cougar Performance Drivetrain orders?

    Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Mercury Performance Drivetrains and more.

    What is your return policy for Mercury Cougar Performance Drivetrains?

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