1966 Mercury S-55 Gear Boxes
Keep Your 1966 Mercury S-55 in Top Shape with Quality Gear Boxes
Whether you’re repairing or upgrading your Gear Box, using high-quality parts is key to keeping your 1966 Mercury S-55 looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Steering Gear Box Seals and Steering Gear Box. 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 1966 Mercury S-55 Gear Box at Advance Auto Parts is around $415.76, with a range that starts at $17.49 and goes up to $717.99. With 11 options in stock from 3 trusted brands, finding the right fit is easy. Popular picks like Steering Gear Major Seal Kit, Remanufactured Power Steering Gear Box, and Multi-Purpose Seal start at just $17.49 and offer a great balance of form and function.
Explore Related Parts
While you’re upgrading or replacing your Gear Box, don’t forget to check out other key components like Ball Joints and Idler Arms. At Advance Auto Parts, we’re here to help you keep your 1966 Mercury S-55 in peak condition, inside and out.
Find Your Specific 1966 Mercury S-55 Gear Boxes
Looking for the perfect Gear Box for your 1966 Mercury S-55? You’re in the right place. Below, you’ll find links to various types of Gear Boxes that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Gear Boxes, ensuring durability and a precise fit for your Mercury S-55. Whether you’re driving a 1966 model or another popular model year like
1967, we’ve got you covered. Purchasing Gear Boxes 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 Gear Boxes that fit your vehicle.
Essential 1966 Mercury S-55 Gear Boxes
Powercraft – Steering Gear Major Seal Kit (Part No.7642)
from
$61.99
Premium-quality parts for lasting repairs. Engineered to OE design and specifications.
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National – Multi-Purpose Seal (Part No.340151)
from
$17.49
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:
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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
Lares – PS GEAR-NEW (Part No.10807)
from
$623.99
PS GEAR-NEW
Lares – Remanufactured Power Steering Gear Box (Part No.806)
from
$376.99
Power Steering Gears are thoroughly cleaned and exterior surfaces reconditioned for like-new look. Each component is carefully inspected and replaced if not to OE tolerances. All seals and O-rings are replaced with OE equivalent parts. Each unit is tested to insure OE performance. Painted with a high quality paint. All units are carefully packaged to insure safe arrival at your door. Remanufactured in the USA.
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Lares – Remanufactured Power Steering Gear Box (Part No.840)
from
$383.99
Power Steering Gears are thoroughly cleaned and exterior surfaces reconditioned for like-new look. Each component is carefully inspected and replaced if not to OE tolerances. All seals and O-rings are replaced with OE equivalent parts. Each unit is tested to insure OE performance. Painted with a high quality paint. All units are carefully packaged to insure safe arrival at your door. Remanufactured in the USA.
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Lares – New Power Steering Gear Box (Part No.10806)
from
$660.99
New Power Steering Gears are engineered to OE specifications. Each unit is inspected, adjusted and hydraulically tested. All units are carefully packaged to insure safe arrival at your door.
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Lares – New Manual Steering Gear Box (Part No.18922)
from
$394.99
New Manual Steering Gears are engineered to OE specifications. Each unit is inspected, adjusted and filled with a high quality grease, ready for installation. All units are carefully packaged to insure safe arrival at your door.
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Lares – PS GEAR-NEW (Part No.10841)
from
$623.99
PS GEAR-NEW
Lares – New Power Steering Gear Box (Part No.10840)
from
$717.99
New Power Steering Gears are engineered to OE specifications. Each unit is inspected, adjusted and hydraulically tested. All units are carefully packaged to insure safe arrival at your door.
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Lares – Remanufactured Manual Steering Gear Box (Part No.8922)
from
$301.99
Manual Steering Gears are thoroughly cleaned and exterior surfaces reconditioned for like-new look. Each component is carefully inspected and replaced if not to OE tolerances. All seals and O-rings are replaced with OE equivalent parts. Each unit is filled with a high quality grease with a special polymer to reduce oil separation. Each unit is tested to insure OE performance. Painted with a high quality paint. All units are carefully packaged to insure safe arrival at your door. Remanufactured in the USA.
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Lares – Remanufactured Power Steering Gear Box (Part No.841)
from
$408.99
Power Steering Gears are thoroughly cleaned and exterior surfaces reconditioned for like-new look. Each component is carefully inspected and replaced if not to OE tolerances. All seals and O-rings are replaced with OE equivalent parts. Each unit is tested to insure OE performance. Painted with a high quality paint. All units are carefully packaged to insure safe arrival at your door. Remanufactured in the USA.
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Popular 1966 Mercury S-55 Gear Boxes Categories
Most Popular Steering Gear Box Seals for 1966 Mercury S-55s
Enhance your 1966 Mercury S-55 with one of the 2 Steering Gear Box Seals we have in stock, starting at just $17.49.
Powercraft – Steering Gear Major Seal Kit (Part No.7642)
from
$61.99
Premium-quality parts for lasting repairs. Engineered to OE design and specifications.
See More
National – Multi-Purpose Seal (Part No.340151)
from
$17.49
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:
See More
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
Best-Selling 1966 Mercury S-55 Steering Gear Box
Upgrade your S-55 with one of our 9 best-selling Steering Gear Box, earning an average 3 stars rating across 2 reviews.
Lares – Remanufactured Power Steering Gear Box (Part No.840)
from
$383.99
Power Steering Gears are thoroughly cleaned and exterior surfaces reconditioned for like-new look. Each component is carefully inspected and replaced if not to OE tolerances. All seals and O-rings are replaced with OE equivalent parts. Each unit is tested to insure OE performance. Painted with a high quality paint. All units are carefully packaged to insure safe arrival at your door. Remanufactured in the USA.
See More
Lares – Remanufactured Power Steering Gear Box (Part No.841)
from
$408.99
Power Steering Gears are thoroughly cleaned and exterior surfaces reconditioned for like-new look. Each component is carefully inspected and replaced if not to OE tolerances. All seals and O-rings are replaced with OE equivalent parts. Each unit is tested to insure OE performance. Painted with a high quality paint. All units are carefully packaged to insure safe arrival at your door. Remanufactured in the USA.
See More
Lares – Remanufactured Power Steering Gear Box (Part No.806)
from
$376.99
Power Steering Gears are thoroughly cleaned and exterior surfaces reconditioned for like-new look. Each component is carefully inspected and replaced if not to OE tolerances. All seals and O-rings are replaced with OE equivalent parts. Each unit is tested to insure OE performance. Painted with a high quality paint. All units are carefully packaged to insure safe arrival at your door. Remanufactured in the USA.
See More
Lares – New Power Steering Gear Box (Part No.10840)
from
$717.99
New Power Steering Gears are engineered to OE specifications. Each unit is inspected, adjusted and hydraulically tested. All units are carefully packaged to insure safe arrival at your door.
See More
Lares – New Power Steering Gear Box (Part No.10806)
from
$660.99
New Power Steering Gears are engineered to OE specifications. Each unit is inspected, adjusted and hydraulically tested. All units are carefully packaged to insure safe arrival at your door.
See More
Lares – PS GEAR-NEW (Part No.10841)
from
$623.99
PS GEAR-NEW
Lares – PS GEAR-NEW (Part No.10807)
from
$623.99
PS GEAR-NEW
Lares – New Manual Steering Gear Box (Part No.18922)
from
$394.99
New Manual Steering Gears are engineered to OE specifications. Each unit is inspected, adjusted and filled with a high quality grease, ready for installation. All units are carefully packaged to insure safe arrival at your door.
See More
Lares – Remanufactured Manual Steering Gear Box (Part No.8922)
from
$301.99
Manual Steering Gears are thoroughly cleaned and exterior surfaces reconditioned for like-new look. Each component is carefully inspected and replaced if not to OE tolerances. All seals and O-rings are replaced with OE equivalent parts. Each unit is filled with a high quality grease with a special polymer to reduce oil separation. Each unit is tested to insure OE performance. Painted with a high quality paint. All units are carefully packaged to insure safe arrival at your door. Remanufactured in the USA.
See More
FAQs for 1966 Mercury S-55 Gear Boxes
What are the best-selling Gear Boxes for 1966 Mercury S-55s?
Out of 11 Gear Boxes that fit 1966 Mercury S-55s, the following parts are the top sellers:
- Steering Gear Major Seal Kit (3869563) – $61.99
- Remanufactured Power Steering Gear Box (18490314) – $376.99
- Multi-Purpose Seal (18442955) – $17.49
What’s the price range for 1966 Mercury S-55 Gear Boxes?
The prices of Gear Boxes for the 1966 Mercury S-55 range from $17.49 up to $717.99 for the most premium parts.
What is the average price of a Gear Box for a 1966 Mercury S-55?
The average price for Gear Boxes for the 1966 Mercury S-55 is $415.76. Keep in mind the variety of part types within our Gear Box category, where you are likely to find a wide range of prices across a variety of parts and components.
What are the cheapest Gear Boxes for my 1966 Mercury S-55?
The cheapest 1966 Mercury S-55 Gear Boxes we carry are:
- Multi-Purpose Seal (18442955) – $17.49
- Steering Gear Major Seal Kit (3869563) – $61.99
- Remanufactured Manual Steering Gear Box (18490348) – $301.99
- Remanufactured Power Steering Gear Box (18490314) – $376.99
- Remanufactured Power Steering Gear Box (18490315) – $383.99
Does Advance Auto Parts sell Gear Boxes for any other 1966 Mercury models?
Yes. We stock Gear Boxes for 11 other popular 1966 Mercury models. Some of the most popular are 1966 Monterey Gear Boxes, 1966 Marauder Gear Boxes, 1966 Colony Park Gear Boxes, 1966 Villager Gear Boxes, and 1966 Capri Gear Boxes.
What are the top-rated Gear Boxes that fit the 1966 Mercury S-55?
The one 1966 Mercury S-55 Gear Box we have in stock is the Multi-Purpose Seal. It costs $17.49.
What types of Gear Boxes do you sell for my 1966 Mercury S-55?
As of 11/2/25, these are some of the most in-demand types of Gear Boxes for a 1966 Mercury S-55:
Can I get help with 1966 Mercury S-55 Gear Box orders?
Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Mercury Gear Boxes and more.
What is your return policy for Mercury S-55 Gear Boxes?
Advance Auto Parts keeps returns simple. For new Mercury S-55 Gear Boxes and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.