1966 Mercury S-55 Transmission Parts

Name: Multi-Purpose Seal
Brand: National
SKU: 331107N
Price: 11.99 USD
Rating: 4.5 (20 reviews)

Below you will find various in-demand Mercury Transmission Parts, components and accessories for your 1966 S-55. Advance Auto Parts has popular S-55 parts like Transmission Mounts, Transmission Bearings, Automatic Transmission Parts and more. You’ll also find aftermarket and OEM Transmission Parts for other S-55 model years including 1967 and more. Select a category of 1966 Mercury S-55 Transmission Parts below and start saving instantly.

Popular 1966 Mercury S-55 Transmission Parts Categories

Gear Shift Levers

Automatic Transmission Shift Linkage Bushings

Transmission Torque Converters

OE Transmission Coolers

Manual Transmission Differential Bearings

Transmission Oil Cooler Lines

Countershaft Bearings

Manual Transmission Output Shaft Bearings

Transmission Pan Gaskets

Transmission Mounts

Transmission Oil Pans

Transmission Rebuild Kits

Transmission Oil Pan Gaskets

Transmission Bushings

Automatic Transmission Control Shaft Seals

Automatic Transmission Oil Pump Seals

Transmission Modulator Valves

Pinion Seals

Remote Control Seal

Transmission Seals and O-rings

Manual Transmission Bearing and Seal Overhaul Kits

Torque Converter Seals

Extension Housing Seals

Manual Transmission Output Shaft Seals

Shaft Seals

Transmission Gasket Sets

Miscellaneous Automatic Transmission Seals

Transmission Shift Kits

Miscellaneous Transmission Bearings

Automatic Transmission Fluid Filler Tube Seals

Automatic Transmission Friction Discs

Drive Sprocket Bearings

Manual Transmission Bearing

Automatic Transmission Bushing Kits

Overdrive Seals

Manual Transmission Countershaft Bearing Set

Essential Transmission Parts for 1966 Mercury S-55s

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

from

$340.99

Add fluid capacity to your transmission. Extra fluid means more cooling, and more cooling means better efficiency and performance. Add life to your transmission with a B&M Deep Pan!

Product Features:

Additional Oil Capacity
More Cooling Ability
No Dipstick Modification
Some Include Fluid Pickup Extension
Built-In Drain Plugs
Cast Aluminum

from

$13.29

AT EXT HOUSING SEAL

from

$38.99

The transmission modulator valve is a vacuum operated mechanical device located on the transmission case. This valve will have a actuator rod extended into the transmission valve body inside the transmission which will control the flow of transmission fluid within the transmission to place the transmission in the most optimal forward gear selection.

Product Features:

Application matched component ensures the transmission gear position system can be returned to like new condition.
Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
This part will look and function just like the original unit being replaced.

from

$26.49

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

from

$3.99

AT SOLENOID SEAL

from

$8.99

AT SHF LINK BUSHING

from

$12.49

Value-priced bearing meets all cataloged application requirements.

Product Features:

Brand may vary by location

from

$43.99

Designed to repair damaged, grooved or worn shafts
Durable stainless steel construction for corrosion-free sealing surface that surpasses most original shaft specifications
Ideal for a shaft where indications of seal wear, such as tracks or grooves have developed
Ultra-thin construction (0.01/0.25mm wall thickness) allows original seal size to be used with minimal additional lip loading
Easy to install with removable flange and installation tool

from

$14.99

National Oil Seals & Bearings offer a full line of premium oil seals and bearings.

Product Features:

CONSISTENT PERFORMANCE — Matched cup and cone components ensure consistent performance
PREMIUM MATERIALS — Precision manufactured using premium-grade steel for outstanding durability and performance
SMOOTH ROTATION — Crowned raceways and rollers for even load distribution
OE-STYLE DESIGN — Engineered to meet OE specifications
COMPREHENSIVE COVERAGE — Industry-leading coverage for domestic and import applications
RIGOROUS TESTING — Comprehensive testing throughout design and development processes by National engineers for quality you can count on

from

$10.49

Fel-Pro® gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:

Meets or exceeds all original equipment specifications
Application specific design to ensure a perfect fit
Engineered and manufactured specifically for the repair environment
Unsurpassed quality you can trust
Includes all parts needed to complete the repair

from

$11.99

AT OIL PAN GASKET

from

$12.99

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

from

$10.99

The purpose of the mount is to support the engine and transmission on the chassis and dampen vibration and noise from reverberating to the rest of the vehicle. Engine and Transmission Mounts are engineered and manufactured to meet or exceed OEM specifications using the latest CAD/CAM engineering process to ensure superior quality, form, fit and function. Only premium quality materials are used in the manufacturing process to guarantee precise performance and maximum durability. Applicable to FORD 61-74; MERCURY 65-70;. Please verify your application.

Product Features:

MAXIMUM LIFE & PERFORMANCE: Both natural and SBR (Styrene Butadiene) rubber provide good abrasion resistance and aging stability to ensure maximum life and performance.
MEETS OR EXCEEDS DUROMETER MEASUREMENTS: All rubber material is manufactured to specific Durometer (hardness) measurements based on the vehicle’s application requirements.
HARDENED STEEL FASTENERS: All fasteners are made of hardened steel with heat treated Grade #5 bolts.
SUPERIOR BOND: A special Chemlock® bonding agent is used to ensure a superior rubber-to-metal bond.
HYDRAULIC MOUNT DESIGN: Hydraulic Mounts (applicable where OE) are designed for most front wheel drive vehicles because transverse drive train mounting.
For Years: 1961-1974
Weight approx: 2 Lbs

from

$23.79

With advanced load-carrying capacity and compact design, tapered roller bearings are used in wheel bearings, transmissions, differentials, transfer cases and other miscellanous applications. FAG manufacturers over 100 million tapered roller bearings annually.

Product Features:

High-precision and High-quality components used in all KITs
Coverage of classic and new high-tech solutions for the best system coverage

from

$33.99

Product Features:

BUILT TO LAST: Advanced heat treatment process for strength
PREMIUM MATERIALS: Precision manufactured using premium-grade steel for lasting performance and extended bearing life
RELIABLE PERFORMANCE: Element size and quantity are engineered to meet or exceed the load rating of OE bearings
COMPREHENSIVE COVERAGE: Industry-leading coverage for domestic and import applications
RIGOROUS TESTING: Comprehensive testing throughout design and development processes by National engineers for quality you can count on

from

$4.99

Value-priced seal meets all cataloged application requirements.

Product Features:

Brand may vary by location

from

$6.99

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

from

$13.99

AT CLUTCH PLATE

from

$25.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Transmission cooler reinstallation kit
Contains part numbers 248001, 226201, 240250 and 4 hose clamps
Provides all hardware for reinstallation of Imperial transmission coolers
Contains nylon mounting rods, foam pads, locking buttons, hose and fitting
Made of high grade nylon for easy installation
Removable buttons for cooler/fan relocation
Made for both transmission coolers and electric fan installation
Comes with Quick Connect coupler

from

$699.99

Converter: C-6 1.848 Cp 28-3200 Stall

from

$10.49

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

from

$67.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Imperial high-performance transmission cooler
Size: 3/4″ x 7-1/2″ x 12-1/2″
SAE 45-degree fittings for maximum reliability
Electrostatic powder-coated to prevent corrosion
SAE 45 degree fittings for maximum reliability
Electrostatically powder coated to prevent corrosion
All aluminum lightweight construction
SAE 45 degree fittings for maximum reliability
Electrostatically powder coated to prevent corrosion
All aluminum lightweight construction

from

$15.79

High-precision and High-quality components used in all KITs
Coverage of classic and new high-tech solutions for the best system coverage

from

$15.99

Product Features:

CONSISTENT PERFORMANCE: Matched cup and cone components ensure consistent performance
PREMIUM MATERIALS: Precision manufactured using premium-grade steel for outstanding durability and performance
SMOOTH ROTATION: Crowned raceways and rollers for even load distribution
OE-STYLE DESIGN: Engineered to meet OE specifications
COMPREHENSIVE COVERAGE: Industry-leading coverage for domestic and import applications
RIGOROUS TESTING: Comprehensive testing throughout design and development processes by National engineers for quality you can count on

from

$3.29

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

from

$72.99

AT SHIFT KIT

from

$174.99

Use the B&M Transpak to recalibrate your automatic transmission for optimum performance. With the Transpak you will be able to downshift into low at any speed, and keep it in low to any speed that you want.

Product Features:

Recalibrate Auto. Transmission
Optimum Performance
Select Your App. Mode
Improves Transmission Life
Trans. Removal Not Required

Upgrade your 1966 Mercury S-55 with Top-Quality Transmission Parts

When it comes to maintaining or upgrading your 1966 Mercury S-55, nothing is more important than using high-quality OEM or aftermarket parts that you can trust. Whether you’re repairing damage to your Mercury or enhancing its overall performance, Transmission Parts are key to keeping your S-55 functioning at its best. At Advance Auto Parts, we offer a wide selection of 78 Transmission Parts for the 1966 Mercury S-55, designed to meet your needs without breaking the bank. From Transmission Mount replacements to Transmission Bearings upgrades, we’ve got you covered with parts that fit your vehicle perfectly and ensure long-lasting performance.

Affordable Prices and Wide Selection

Shopping for Transmission Parts for any vehicle can be a hassle, especially if you’re on a budget. But with Advance Auto Parts, you can find high-quality Transmission Parts for your 1966 Mercury S-55 at great prices. Our Transmission Parts inventory for this model ranges from just $3.29 to $774.99, with an average price of $167.50. Our 78 Transmission Parts in stock come from 13 trusted brands, so you’re sure to find the right part for your 1966 Mercury S-55 without overspending.

Top Brands and High Customer Satisfaction

Advance Auto Parts takes pride in offering only the best brands in the automotive industry. For your 1966 Mercury S-55, we stock popular OEM and aftermarket Transmission Parts from top names like National, DriveWorks, Imperial, and more. National Transmission Parts start at just $14.99 and boast an impressive 4.3 stars average rating from customers. DriveWorks and Imperial also bring quality to the table, with Transmission Parts available starting at $10.99, and at an average 4.3 stars rating. With 1,263 customer reviews and counting, our 1966 Mercury S-55 Transmission Parts have a strong track record of reliability, ensuring you can trust your purchase.

Explore Related Parts and More

While you’re here, don’t forget to check out other essential categories that go hand in hand with Transmission Part upgrades. Explore related part types like Batteries and Chargers, Fluids and Chemicals and more to make sure your 1966 Mercury S-55 is always ready to roll. We’re committed to providing you with everything you need to keep your S-55 in top shape, all in one place. Start shopping confidently below for your 1966 Mercury S-55!

Best-Selling Transmission Mounts for 1966 Mercury S-55s

Enhance the driving experience in your Mercury with 1 quality Transmission Mount components, starting at $10.99.

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from

$10.99

MAXIMUM LIFE & PERFORMANCE: Both natural and SBR (Styrene Butadiene) rubber provide good abrasion resistance and aging stability to ensure maximum life and performance.
MEETS OR EXCEEDS DUROMETER MEASUREMENTS: All rubber material is manufactured to specific Durometer (hardness) measurements based on the vehicle’s application requirements.
HARDENED STEEL FASTENERS: All fasteners are made of hardened steel with heat treated Grade #5 bolts.
SUPERIOR BOND: A special Chemlock® bonding agent is used to ensure a superior rubber-to-metal bond.
HYDRAULIC MOUNT DESIGN: Hydraulic Mounts (applicable where OE) are designed for most front wheel drive vehicles because transverse drive train mounting.
For Years: 1961-1974
Weight approx: 2 Lbs

Top Picks for 1966 Mercury S-55 Automatic Transmission Parts

Upgrade Mercury S-55s with top-quality Automatic Transmission Parts parts, including 10 OEM and aftermarket selections for your 1966 model.

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from

$7.99

AT SHF LINK BUSHING

from

$3.99

AT SOLENOID SEAL

from

$8.99

AT SHF LINK BUSHING

from

$40.99

AT MODULATOR VALVE

from

$48.99

AT MODULATOR VALVE

from

$38.99

Application matched component ensures the transmission gear position system can be returned to like new condition.
Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
This part will look and function just like the original unit being replaced.

from

$43.99

AT MODULATOR VALVE

from

$13.99

AT CLUTCH PLATE

from

$11.99

This clutch pilot bushing 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 clutch pilot bushing matches the fit and function of the factory part on specified years, makes and models
Ideal solution – this bushing is a reliable replacement for an original part that 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

from

$7.99

AT CLUTCH PLATE

In-Demand Transmission Seals for 1966 Mercury S-55s

Select from 15 premium Transmission Seals parts for your 1966 Mercury S-55, with prices ranging from $3.29 to $176.99.

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from

$10.99

Value-priced seal meets all cataloged application requirements.

Product Features:

Brand may vary by location

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

from

$14.99

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

from

$9.99

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

from

$26.49

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

from

$9.99

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

from

$11.99

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

from

$4.99

Value-priced seal meets all cataloged application requirements.

Product Features:

Brand may vary by location

from

$6.99

AT CONTR SHAFT SEAL

from

$3.29

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

from

$6.99

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

from

$10.49

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

from

$13.29

AT EXT HOUSING SEAL

from

$8.79

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

from

$176.99

ManTransBrg-SealKit

Most Sold 1966 Mercury S-55 Transmission Cooler and Parts

Explore our best-selling Mercury parts for the 1966 S-55 among 10 OEM and aftermarket options starting from $25.99.

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from

$85.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Imperial high-performance transmission cooler
Size: 3/4″ x 10″ x 15-7/8″
SAE 45-degree fittings for maximum reliability
Electrostatic powder-coated to prevent corrosion
SAE 45 degree fittings for maximum reliability
Electrostatically powder coated to prevent corrosion
All aluminum lightweight construction
SAE 45 degree fittings for maximum reliability
Electrostatically powder coated to prevent corrosion
All aluminum lightweight construction

from

$73.99

Product Features:

Imperial Maxi-Cool« plate and fin transmission cooler
Size: 3/4″ x 11″ x 7-1/2″
Mid-size and full-size cars, pickups
GVWR up to 20,000 lbs.; towing up to 2,500 lbs.
Compatible with OEM cooler systems
Made with the highest quality materials
100% pressure testing to 150 PSI for quality assurance
33% more efficient than a comparable tube and fin design

from

$85.99

The Imperial Maxi-Cool XL’s plate and fin design offer excellent cooling efficiency in a compact, space-efficient design.

Product Features:

Class “A” motor homes, large travel trailers, 5th-wheel trailers
GVWR up to 30,000 lbs.; towing up to 10,000 lbs.
Compatible with OEM cooler systems
33% more efficient than a comparable tube and fin design

from

$65.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Imperial Econo-Kool tube and fin transmission cooler
Size: 3/4″ x 10″ x 15-7/8″
Class “A” motor homes, large travel trailers, 5th-wheel trailers
GVWR up to 26,000 lbs.; towing up to 10,000 lbs.
Compatible with OEM cooler systems
Ultrasonically soldered for reliability
100% pressure testing to 150 PSI for quality assurance
High efficiency turbulators
Compatible with OEM cooler systems
Ultrasonically soldered for reliability
100% pressure testing to 150 PSI for quality assurance
High efficiency turbulators

from

$80.99

The Imperial Maxi-Cool XL’s plate and fin design offer excellent cooling efficiency in a compact, space-efficient design.

Product Features:

Imperial Rapid-Cool plate and fin transmission cooler
Size: 3/4″ x 11″ x 9-1/2″
Pickup trucks and vans, class “C” motor homes, travel trailers to 24′
GVWR up to 24,000 lbs.; towing up to 5,000 lbs.
33% more efficient than a comparable tube and fin design
Compatible with OEM cooler systems
Made with the highest quality materials
100% pressure testing to 150 PSI for quality assurance
33% more efficient than a comparable tube and fin design

from

$52.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Mid-size and full-size cars, pickups
GVWR up to 18,000 lbs.; towing up to 3,500 lbs
Compatible with OEM cooler systems
Ultrasonically soldered for reliability
100% pressure testing to 150 PSI for quality assurance
High efficiency turbulators
Compatible with OEM cooler systems
Ultrasonically soldered for reliability
100% pressure testing to 150 PSI for quality assurance
High efficiency turbulators

from

$83.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Imperial high-performance transmission cooler
Size: 3/4″ x 7-1/2″ x 15-7/8″
SAE 45-degree fittings for maximum reliability
Electrostatic powder-coated to prevent corrosion
Up to Class C motorhomes, towing up to 5,000 pounds
SAE 45 degree fittings for maximum reliability
Electrostatically powder coated to prevent corrosion
All aluminum lightweight construction

from

$25.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Transmission cooler reinstallation kit
Contains part numbers 248001, 226201, 240250 and 4 hose clamps
Provides all hardware for reinstallation of Imperial transmission coolers
Contains nylon mounting rods, foam pads, locking buttons, hose and fitting
Made of high grade nylon for easy installation
Removable buttons for cooler/fan relocation
Made for both transmission coolers and electric fan installation
Comes with Quick Connect coupler

from

$67.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Imperial high-performance transmission cooler
Size: 3/4″ x 7-1/2″ x 12-1/2″
SAE 45-degree fittings for maximum reliability
Electrostatic powder-coated to prevent corrosion
SAE 45 degree fittings for maximum reliability
Electrostatically powder coated to prevent corrosion
All aluminum lightweight construction
SAE 45 degree fittings for maximum reliability
Electrostatically powder coated to prevent corrosion
All aluminum lightweight construction

from

$65.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Imperial Econo-Kool tube and fin transmission cooler
Size: 3/4″ x 7-1/2″ x 15-7/8″
Pickup trucks and vans, class “C” motor homes, travel trailers to 24′
GVWR up to 22,000 lbs.; towing up to 5,000 lbs.
Compatible with OEM cooler systems
Ultrasonically soldered for reliability
100% pressure testing to 150 PSI for quality assurance
High efficiency turbulators
Compatible with OEM cooler systems
Ultrasonically soldered for reliability
100% pressure testing to 150 PSI for quality assurance
High efficiency turbulators

Top-Rated Transmission Parts Brands For Your 1966 Mercury S-55

Shop for the best-rated brands offering Transmission Parts and other products for your 1966 Mercury S-55s. Below you’ll find some of our best rated Transmission Parts from National, DriveWorks, and Imperial, and more. Transmission Parts from these brands that fit a 1966 S-55 start at just $10.99 and are rated as high as 4.3 stars. OEM and aftermarket Transmission Parts don’t get more top quality, durable, and affordable than from the brands below.

Popular National 1966 Mercury S-55 Transmission Parts

When it comes to maintaining or upgrading your 1966 Mercury S-55, using quality Transmission Parts is essential to ensure durability and a perfect fit. National ticks all of those boxes. We offer a wide selection of National Transmission Parts, specifically designed for the 1966 Mercury S-55. With over 3 National brand Transmission Parts in stock, you’re sure to find what you need. The prices for these top-notch parts start as low as $14.99, with an average price of just $16.59. Plus, with over 31 customer reviews and an average rating of 4.3 stars, you can trust that our National Transmission Parts will get the job done right. Choose Advance Auto Parts for reliability, quality, and expert-approved parts that keep your vehicle running strong.

from $16.99

(25)

Multi-Purpose Bearing

“Smooth”

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”

from $14.99

(3)

Multi-Purpose Seal

“good quality”

Popular DriveWorks 1966 Mercury S-55 Transmission Parts

DriveWorks auto parts is one of the highest quality Transmission Part brands in the market. Any 1966 Mercury S-55 owner should feel confident when installing genuine DriveWorks parts in their vehicle. To ensure the best fit and performance for your 1966 S-55, Advance Auto Parts carries a full inventory of 3 DriveWorks Transmission Parts. Plus you will be keeping your Mercury in peak condition while saving money because prices on these DriveWorks Transmission Parts range from $10.99 to $12.49, plus, with more than 63 customer reviews and an impressive 4.3 stars average rating, you can be confident the Fram Transmission Parts below will deliver on both quality and value.

from $10.99

(38)

Taper Bearing Set

“Good product, fit perfectly.”

from $12.49

(17)

Tapered Cone/Cup Wheel Bearing Set

“Good quality”

from $10.99

(8)

Oil Seal

“Nice price 👍 perfect fit 👌”

FAQs for 1966 Mercury S-55 Transmission Parts

Which Transmission Parts are best-sellers for 1966 Mercury S-55s?

Out of 78 Transmission Parts that fit 1966 Mercury S-55s, the following parts are the top sellers:

Taper Bearing Set (5050537) – $10.99
High Performance Transmission Oil Cooler (3670013) – $83.99
Tapered Cone/Cup Wheel Bearing Set (5050758) – $12.49

What’s the price range for 1966 Mercury S-55 Transmission Parts?

Transmission Part prices for the 1966 Mercury S-55 start at $3.29 and go up to $774.99 for the most premium parts.

What’s the average price of a Transmission Part for a 1966 Mercury S-55?

The average price for Transmission Parts for the 1966 Mercury S-55 is $167.50. Keep in mind the variety of part types within our Transmission Part category so you are likely to find a wide range of prices across a variety of parts and components.

What are the cheapest Transmission Parts for my 1966 Mercury S-55?

The cheapest 1966 Mercury S-55 Transmission Parts we carry in stock are:

Multi-Purpose Seal (18442789) – $3.29
AT SOLENOID SEAL (11239035) – $3.99
Oil Seal (5440602) – $4.99
AT CONTR SHAFT SEAL (11240381) – $6.99
Multi-Purpose Seal (18444989) – $6.99

What are the top-rated Transmission Parts that fit the 1966 Mercury S-55?

Out of 1,263 reviews by customers, our 1966 Mercury S-55 Transmission Parts have an average customer rating of . These are some of the highest-rated Transmission Part types for the 1966 Mercury S-55 and their top-rated products:

Transmission Cooler and Parts
- High Performance Transmission Oil Cooler (15230020) – $85.99
- Maxi-Kool® XL Transmission Oil Cooler (12031443) – $73.99
- Maxi-Kool XL Transmission Oil Cooler (5670021) – $85.99
Automatic Transmission Pan and Gaskets
- High Performance Transmission Oil Cooler (15230020) – $85.99
- Maxi-Kool® XL Transmission Oil Cooler (12031443) – $73.99
- Maxi-Kool XL Transmission Oil Cooler (5670021) – $85.99

What types of Transmission Parts do you sell for my 1966 Mercury S-55?

As of 11/2/25, these are some of the most in-demand types of Transmission Parts for a 1966 Mercury S-55:

Can I get help with 1966 Mercury S-55 Transmission Part orders?

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

What is your return policy for Mercury S-55 Transmission Parts?

Advance Auto Parts keeps returns simple. For new Mercury S-55 Transmission Parts and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.

1966 Mercury S-55 Transmission Parts

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

B & M – Cast Deep Transmission Pan For C6 (Part No.40281)

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

Carquest Premium – Automatic Transmission Modulator Valve (Part No.VMC1042)

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

ATP – AT SOLENOID SEAL (Part No.JO-15)

ATP – AT SHF LINK BUSHING (Part No.FO-300)

Driveworks – Tapered Cone/Cup Wheel Bearing Set (Part No.S-A-37)

National – Shaft Repair Sleeve (Part No.99193)

National – Multi-Purpose Bearing (Part No.A-3)

Felpro – Manual Transmission Gasket Set (Part No.TS 13405)

ATP – AT OIL PAN GASKET (Part No.FG-114)

Felpro – Transmission Oil Pan Gasket 17 Bolt Hole One Piece Gasket (Part No.TOS 18628)

Anchor – Transmission Mount: Rear, 1 Piece (Part No.2242)

FAG US – Cone (Part No.KLM603049)

National – Multi-Purpose Bearing (Part No.207-L)

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

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

ATP – AT CLUTCH PLATE (Part No.FC-4)

Imperial – Transmission Oil Cooler Reinstallation Kit (Part No.248002)

Hays – Converter: C-6 1.848 Cp 28-3200 Stall (Part No.97-2G28Q)

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

Imperial – High Performance Transmission Oil Cooler (Part No.240512)

FAG US – Cone (Part No.KM12649)

National – Multi-Purpose Bearing (Part No.A-2)

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

ATP – AT SHIFT KIT (Part No.FK-6)

B & M – Transpak, 67-91 C6 Transmission (Part No.40228)

Anchor – Transmission Mount: Rear, 1 Piece (Part No.2242)

Driveworks – Taper Bearing Set (Part No.S-A-6)

National – Multi-Purpose Bearing (Part No.A-3)

National – Multi-Purpose Bearing (Part No.A-2)

Driveworks – Tapered Cone/Cup Wheel Bearing Set (Part No.S-A-37)

National – Multi-Purpose Bearing (Part No.207-L)

FAG US – Cone (Part No.KLM603049)

FAG US – Cone (Part No.KM12649)

ATP – AT SHF LINK BUSHING (Part No.FO-405)

ATP – AT SOLENOID SEAL (Part No.JO-15)

ATP – AT SHF LINK BUSHING (Part No.FO-300)

ATP – AT MODULATOR VALVE (Part No.FX-102)

ATP – AT MODULATOR VALVE (Part No.FX-194)

Carquest Premium – Automatic Transmission Modulator Valve (Part No.VMC1042)

ATP – AT MODULATOR VALVE (Part No.FX-80)

ATP – AT CLUTCH PLATE (Part No.FC-4)

Dorman – Clutch Pilot Bushing .671 In. x 1.851 In. Type A, Length .503 In. (sold by each) (Part No.690-032)

ATP – AT CLUTCH PLATE (Part No.FC-105)

Driveworks – Oil Seal (Part No.S-7300S)

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

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

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

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

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

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

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

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

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

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

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

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

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

USA Standard Gear – ManTransBrg-SealKit (Part No.74117)

Imperial – High Performance Transmission Oil Cooler (Part No.240516)

Imperial – Maxi-Kool® XL Transmission Oil Cooler (Part No.243007)

Imperial – Maxi-Kool XL Transmission Oil Cooler (Part No.243012)

Imperial – Econo-Kool Transmission Oil Cooler (Part No.241018)

Imperial – Plate and Fin Style Transmission Cooler, Heavy Duty, 3/4" x 9-1/2" x 11" (Part No.243008)

Imperial – Econo-Kool® Transmission Oil Cooler (Part No.242012)

Imperial – High Performance Transmission Oil Cooler (Part No.240514)

Imperial – Transmission Oil Cooler Reinstallation Kit (Part No.248002)

Imperial – High Performance Transmission Oil Cooler (Part No.240512)

Imperial – Econo-Kool Transmission Oil Cooler (Part No.242016)