1966 Mercury Comet Transmission Seals

Keep Your 1966 Mercury Comet in Top Shape with Quality Transmission Seals

Whether you’re repairing or upgrading your Transmission Seal, using high-quality parts is key to keeping your 1966 Mercury Comet looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Transmission Seals and O-rings, Automatic Transmission Oil Pump Seals, and Extension Housing Seals. 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.

Top-Rated Transmission Seals from Trusted Brands

Looking for a reliable Transmission Seal? We’ve got you covered with options from brands you know and trust like National and DriveWorks. For example, National Transmission Seals start at just $9.99 with an average 4.3 star rating. DriveWorks offer similar pricing and quality, backed by strong customer feedback. With over 243 reviews and a solid 5 star average, you can shop with confidence knowing other Mercury Comet owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1966 Mercury Comet Transmission Seal at Advance Auto Parts is around $38.81, with a range that starts at $3.29 and goes up to $176.99. With 21 options in stock from 4 trusted brands, finding the right fit is easy. Popular picks like Oil Seal, AT CONTR SHAFT SEAL, and Oil Seal start at just $4.99 and offer a great balance of form and function.

Find Your Specific 1966 Mercury Comet Transmission Seals

Looking for the perfect Transmission Seal for your 1966 Mercury Comet? You’re in the right place. Below, you’ll find links to various types of Transmission Seals that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Transmission Seals, ensuring durability and a precise fit for your Mercury Comet. Whether you’re driving a 1966 model or another popular model year like 1968, 1969, 1971, 1972, 1973, 1974, 1975, 1976, and 1977, we’ve got you covered. Purchasing Transmission Seals from Advance Auto Parts is a smart choice, giving you access to trusted brands and parts built to perform. Below, you’ll find links to various types of Transmission Seals that fit your vehicle.

Essential 1966 Mercury Comet Transmission Seals

National – Automatic Transmission Extension Housing Seal Kit (Part No.5203)

Automatic Transmission Extension Housing Seal Kit

from

$26.49
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:
  • Design type: spring loaded; multi-lip
  • Temperature range: -40 Deg. F to 225 Deg. F / -40 Deg. C to 107 Deg. C
  • Good low temperature capability
  • Low swell in hydrocarbon fluids
  • Delivers quality and reliable performance for every type of repair
See More

(5 reviews)
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National – Multi-Purpose Seal (Part No.470059)

Multi-Purpose Seal

from

$9.99
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:
  • Design type: spring loaded; multi-lip
  • Temperature range: -40 Deg. F to 225 Deg. F / -40 Deg. C to 107 Deg. C
  • Good low temperature capability
  • Low swell in hydrocarbon fluids
  • Delivers quality and reliable performance for every type of repair
See More

(1 reviews)
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Driveworks – Oil Seal (Part No.S-7692S)

Oil Seal

from

$4.99
Value-priced seal meets all cataloged application requirements.

Product Features:
  • Brand may vary by location
See More

(9 reviews)
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National – Multi Purpose Seal (Part No.7300S)

Multi Purpose Seal

from

$17.79
Product Features:
  • Design type: spring loaded; multi-lip
  • Temperature range: -20 Deg. F to 300 Deg. F / -29 Deg. C to 49 Deg. C
  • Resistance to EP lubricants
  • Low swell in hydrocarbon fluids
  • Delivers quality and reliable performance for every type of repair
See More

(3 reviews)
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National – Multi-Purpose Seal (Part No.331107N)

Multi-Purpose Seal

from

$11.99
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:
  • Design type: spring loaded; single-lip
  • Temperature range: -80 Deg. F to 350 Deg. F / -62 Deg. C to 176 Deg. C
  • Good dry heat resistance
  • Excellent low temperature capability
  • Delivers quality and reliable performance for every type of repair
See More

(20 reviews)
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National – Multi-Purpose Seal (Part No.7044NA)

Multi-Purpose Seal

from

$14.99
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:
  • Design type: spring loaded; multi-lip
  • Temperature range: -40 Deg. F to 225 Deg. F / -40 Deg. C to 107 Deg. C
  • Good low temperature capability
  • Low swell in hydrocarbon fluids
  • Delivers quality and reliable performance for every type of repair
See More

(3 reviews)
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National – Multi-Purpose Seal (Part No.340797)

Multi-Purpose Seal

from

$8.79
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:
  • Design type: springless; single-lip
  • Temperature range: -40 Deg. F to 225 Deg. F / -40 Deg. C to 107 Deg. C
  • Good low temperature capability
  • Low swell in hydrocarbon fluids
  • Delivers quality and reliable performance for every type of repair
See More
View Product

National – Multi-Purpose Seal (Part No.6835S)

Multi-Purpose Seal

from

$10.49
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:
  • Design type: spring loaded; single-lip
  • Temperature range: -40 Deg. F to 225 Deg. F / -40 Deg. C to 107 Deg. C
  • Good low temperature capability
  • Low swell in hydrocarbon fluids
  • Delivers quality and reliable performance for every type of repair
See More
View Product

ATP – AT EXT HOUSING SEAL (Part No.HO-8)

AT EXT HOUSING SEAL

from

$13.29
AT EXT HOUSING SEAL
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ATP – AT EXT HOUSING SEAL (Part No.FO-199)

AT EXT HOUSING SEAL

from

$17.29
AT EXT HOUSING SEAL
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ATP – AT EXT HOUSING SEAL (Part No.HO-9)

AT EXT HOUSING SEAL

from

$12.29
AT EXT HOUSING SEAL
View Product

National – Multi-Purpose Seal (Part No.7692S)

Multi-Purpose Seal

from

$9.99
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:
  • Design type: spring loaded; multi-lip
  • Temperature range: -20 Deg. F to 300 Deg. F / -29 Deg. C to 49 Deg. C
  • Resistance to EP lubricants
  • Low swell in hydrocarbon fluids
  • Delivers quality and reliable performance for every type of repair
See More

(3 reviews)
View Product

National – Multi-Purpose Seal (Part No.240698)

Multi-Purpose Seal

from

$3.29
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:
  • Design type: springless; single-lip
  • Temperature range: -40 Deg. F to 225 Deg. F / -40 Deg. C to 107 Deg. C
  • Good low temperature capability
  • Low swell in hydrocarbon fluids
  • Delivers quality and reliable performance for every type of repair
See More
View Product

National – Multi-Purpose Seal (Part No.240816)

Multi-Purpose Seal

from

$8.79
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:
  • Design type: springless; single-lip
  • Temperature range: -40 Deg. F to 225 Deg. F / -40 Deg. C to 107 Deg. C
  • Good low temperature capability
  • Low swell in hydrocarbon fluids
  • Delivers quality and reliable performance for every type of repair
See More
View Product

National – Multi-Purpose Seal (Part No.7929S)

Multi-Purpose Seal

from

$6.99
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:
  • Design type: spring loaded; single-lip
  • Temperature range: -40 Deg. F to 225 Deg. F / -40 Deg. C to 107 Deg. C
  • Good low temperature capability
  • Low swell in hydrocarbon fluids
  • Delivers quality and reliable performance for every type of repair
See More
View Product

ATP – AT CONTR SHAFT SEAL (Part No.FO-15)

AT CONTR SHAFT SEAL

from

$6.99
AT CONTR SHAFT SEAL
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Most Popular Transmission Seals and O-rings for 1966 Mercury Comets

Enhance your 1966 Mercury Comet with one of the 2 Transmission Seals and O-rings we have in stock, starting at just $9.99.
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National – Multi-Purpose Seal (Part No.470059)

Multi-Purpose Seal

from

$9.99
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:
  • Design type: spring loaded; multi-lip
  • Temperature range: -40 Deg. F to 225 Deg. F / -40 Deg. C to 107 Deg. C
  • Good low temperature capability
  • Low swell in hydrocarbon fluids
  • Delivers quality and reliable performance for every type of repair
See More

(1 reviews)
View Product

National – Automatic Transmission Extension Housing Seal Kit (Part No.5203)

Automatic Transmission Extension Housing Seal Kit

from

$26.49
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:
  • Design type: spring loaded; multi-lip
  • Temperature range: -40 Deg. F to 225 Deg. F / -40 Deg. C to 107 Deg. C
  • Good low temperature capability
  • Low swell in hydrocarbon fluids
  • Delivers quality and reliable performance for every type of repair
See More

(5 reviews)
View Product

Best-Selling 1966 Mercury Comet Automatic Transmission Oil Pump Seal

Upgrade your Comet with our best-selling Automatic Transmission Oil Pump Seal with a 4.5 Starts rating across 20 reviews.
show more show less

National – Multi-Purpose Seal (Part No.331107N)

Multi-Purpose Seal

from

$11.99
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:
  • Design type: spring loaded; single-lip
  • Temperature range: -80 Deg. F to 350 Deg. F / -62 Deg. C to 176 Deg. C
  • Good dry heat resistance
  • Excellent low temperature capability
  • Delivers quality and reliable performance for every type of repair
See More

(20 reviews)
View Product

Top-Quality Extension Housing Seals for 1966 Mercury Comets

Choose a high-quality OEM or aftermarket Extension Housing Seal for Mercury Comets and enjoy top-notch performance from $9.99.
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Driveworks – Oil Seal (Part No.S-7300S)

Oil Seal

from

$10.99
Value-priced seal meets all cataloged application requirements.

Product Features:
  • Brand may vary by location
See More

(8 reviews)
View Product

National – Multi-Purpose Seal (Part No.7692S)

Multi-Purpose Seal

from

$9.99
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:
  • Design type: spring loaded; multi-lip
  • Temperature range: -20 Deg. F to 300 Deg. F / -29 Deg. C to 49 Deg. C
  • Resistance to EP lubricants
  • Low swell in hydrocarbon fluids
  • Delivers quality and reliable performance for every type of repair
See More

(3 reviews)
View Product

ATP – AT EXT HOUSING SEAL (Part No.HO-9)

AT EXT HOUSING SEAL

from

$12.29
AT EXT HOUSING SEAL
View Product

ATP – AT EXT HOUSING SEAL (Part No.HO-8)

AT EXT HOUSING SEAL

from

$13.29
AT EXT HOUSING SEAL
View Product

ATP – AT EXT HOUSING SEAL (Part No.FO-199)

AT EXT HOUSING SEAL

from

$17.29
AT EXT HOUSING SEAL
View Product

Top Picks for 1966 Mercury Comet Manual Transmission Output Shaft Seals

Invest in one of our 2 durable Manual Transmission Output Shaft Seals for your 1966 Mercury, knowing you’re getting trusted brands and expert craftsmanship.
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National – Multi Purpose Seal (Part No.7300S)

Multi Purpose Seal

from

$17.79
Product Features:
  • Design type: spring loaded; multi-lip
  • Temperature range: -20 Deg. F to 300 Deg. F / -29 Deg. C to 49 Deg. C
  • Resistance to EP lubricants
  • Low swell in hydrocarbon fluids
  • Delivers quality and reliable performance for every type of repair
See More

(3 reviews)
View Product

Driveworks – Oil Seal (Part No.S-7692S)

Oil Seal

from

$4.99
Value-priced seal meets all cataloged application requirements.

Product Features:
  • Brand may vary by location
See More

(9 reviews)
View Product

Our Top-Rated Pinion Seals for 1966 Mercury Comets

Make a smart move for your 1966 Mercury Comet with our Pinion Seal for $14.99.
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National – Multi-Purpose Seal (Part No.7044NA)

Multi-Purpose Seal

from

$14.99
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:
  • Design type: spring loaded; multi-lip
  • Temperature range: -40 Deg. F to 225 Deg. F / -40 Deg. C to 107 Deg. C
  • Good low temperature capability
  • Low swell in hydrocarbon fluids
  • Delivers quality and reliable performance for every type of repair
See More

(3 reviews)
View Product

Top-Rated Transmission Seal Brands For Your 1966 Mercury Comet

When it comes to finding the perfect Transmission Seal for your 1966 Mercury Comet, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 4 trusted brands. We carry the most popular Transmission Seal brands including National and DriveWorks, and more, all known for their exceptional customer ratings (average brand rating of 4.3 stars) and competitive prices, as low as $4.99. Purchasing a Transmission Seal from us here at Advance Auto Parts is a smart move for both you and your 1966 Mercury Comet, providing peace of mind with parts that meet or exceed OEM standards.

Popular National 1966 Mercury Comet Transmission Seals

If you’re looking for a top-quality Transmission Seal for your 1966 Mercury Comet, Advance Auto Parts has exactly what you need with our selection of National Transmission Seals. We have 3 National Transmission Seals in stock for this fitment, all known for their durability and precision fit. With prices starting at just $9.99 and an average cost of $14.26, you’ll find the perfect Transmission Seal for your needs and budget. National Transmission Seals for the 1966 Mercury Comet come highly rated, with over 7 customer reviews and an impressive average rating of 4.3 stars. Choosing a National Transmission Seal from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
Multi-Purpose Seal
from $9.99
(1)
Multi-Purpose Seal
“These seals replaced the original “LEATHER” seals. The double lip design (Oil in – Dirt out) is a better seal!”
Multi Purpose Seal
from $17.79
(3)
Multi Purpose Seal
“Fit perfectly and stopped the leak. For anyone who needs to know, I used this seal for my Tremec TKO 600 transmission. This seal is a direct replaceme”
Multi-Purpose Seal
from $14.99
(3)
Multi-Purpose Seal
“good quality”

Top-Quality DriveWorks 1966 Mercury Comet Transmission Seals

For those in search of a high-quality Transmission Seal for their 1966 Mercury Comet, Advance Auto Parts offers a great selection of DriveWorks Transmission Seals. With 2 DriveWorks Transmission Seals in stock, you can trust you’re getting top-tier parts designed for durability and a perfect fit. Prices for these Transmission Seals start at just $4.99, with an average price of $7.99, giving you a range of options to suit your budget. Backed by over 17 customer ratings and an average rating of 4.3 stars, DriveWorks Transmission Seals provide both reliability and excellent performance. Choosing a DriveWorks Transmission Seal from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.
Oil Seal
from $4.99
(9)
Oil Seal
“Good price works fine”
Oil Seal
from $10.99
(8)
Oil Seal
“Nice price 👍 perfect fit 👌”

FAQs for 1966 Mercury Comet Transmission Seals

What are the best-selling Transmission Seals for 1966 Mercury Comets?

Out of 21 Transmission Seals that fit 1966 Mercury Comets, the following parts are the top sellers:

What’s the price range for 1966 Mercury Comet Transmission Seals?

The prices of Transmission Seals for the 1966 Mercury Comet range from $3.29 up to $176.99 for the most premium parts.

What is the average price of a Transmission Seal for a 1966 Mercury Comet?

The average price for Transmission Seals for the 1966 Mercury Comet is $38.81. Keep in mind the variety of part types within our Transmission Seal category, where you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Transmission Seals for other Mercury Comet model years?

Yes, we carry Transmission Seals for 15 model years of Mercury Comets between 1960 and 1977. The following model years are the most popular for Transmission Seal purchases: 1977, 1976, 1975, 1974, 1973, 1972, 1971, 1969, and 1968.

What are the cheapest Transmission Seals for my 1966 Mercury Comet?

The cheapest 1966 Mercury Comet Transmission Seals we carry are:

Does Advance Auto Parts sell Transmission Seals for any other 1966 Mercury models?

Yes. We stock Transmission Seals for 11 other popular 1966 Mercury models. Some of the most popular are 1966 Monterey Transmission Seals, 1966 Marauder Transmission Seals, 1966 Colony Park Transmission Seals, 1966 Villager Transmission Seals, and 1966 Capri Transmission Seals.

What are the top-rated Transmission Seals that fit the 1966 Mercury Comet?

Based on 243 reviews by customers, our 1966 Mercury Comet Transmission Seals have an average customer rating of 5 stars. These are the highest-rated categories of Transmission Seals for the 1966 Mercury Comet and their top-rated products:

What types of Transmission Seals do you sell for my 1966 Mercury Comet?

As of 11/2/25, these are some of the most in-demand types of Transmission Seals for a 1966 Mercury Comet:

Can I get help with 1966 Mercury Comet Transmission Seal orders?

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

What is your return policy for Mercury Comet Transmission Seals?

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

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