Best Car Transmission Washers of 2026

Robert Reyes Avatar
Robert Reyes
Last Updated: Jan 10, 2026

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Car transmission washers are essential components for keeping your vehicle's transmission system running smoothly. These small, circular washers are typically made from steel or copper and are placed between the bolts and the transmission housing to prevent leaks and ensure a tight seal. They come in a variety of sizes and thicknesses to accommodate different types of transmissions and are often sold in sets to ensure that all necessary washers are replaced during maintenance. Whether you're a professional mechanic or a DIY enthusiast, investing in high-quality transmission washers can help prolong the life of your vehicle and prevent costly repairs down the line.

At a Glance: Our Top Picks

Mission Automotive Transmission Washer 20-Pack Cover #TOP 1
Mission Automotive Transmission Washer 20-Pack
ftb score rating icon 9.9
GM Genuine Parts 11611965 Half-Shaft Washer Cover #TOP 2
GM Genuine Parts 11611965 Half-Shaft Washer
ftb score rating icon 9.8
Blue Ox BX88388 Washer Kit for Avail and Ascent Tow Bars Cover #TOP 3
Blue Ox BX88388 Washer Kit for Avail and Ascent Tow Bars
ftb score rating icon 9.6

Top 10 Car Transmission Washers

#TOP 1

Mission Automotive Transmission Washer 20-Pack

TransmissionWashersHonda
Mission Automotive Transmission Washer 20-Pack Cover
Mission Automotive Mission Transmission Washer Drain Plug Seal Gaskets - 25.5mm OD x 18mm ID x 1.95mm Thick, 20-Pack - Compatible with Honda & Acura Models

The Mission Automotive Drain Washers offer a reliable replacement for your Honda and Acura transmission fluid drain plugs. Designed to fit perfectly, these washers help you avoid leaks, ensuring a secure seal during fluid changes. Made from durable materials, they provide long-lasting performance, saving you time and hassle with frequent replacements. Compatible with popular Honda models like Accord, Civic, and CR-V, these washers are versatile and useful for various maintenance tasks. Their precise size guarantees a snug fit, making your transmission fluid changes smoother and more efficient.

What We Like
Reliable leak prevention
Durable material quality
Fits multiple Honda models
Precise sizing for fit
#TOP 2

GM Genuine Parts 11611965 Half-Shaft Washer

11611965
Blue
1 Count (Pack of 1)
GM Genuine Parts 11611965 Half-Shaft Washer Cover
GM Genuine Parts 11611965 0.53 mm Thick Steel Half-Shaft Washer

The GM Genuine Parts 11611965 Half-Shaft Washer is a high-quality auto part that is designed to provide optimal performance and durability. This half-shaft washer is made of 0.53 mm thick steel, ensuring strength and reliability. With its compact dimensions of 7.75" L x 4.75" W x 0.75" H, it is easy to install and fits perfectly in your car's transmission system. The GM Genuine Parts Half-Shaft Washer is manufactured in the United States, guaranteeing its quality and authenticity. Whether you are a professional mechanic or a car enthusiast, this washer is an essential component for maintaining the smooth operation of your vehicle.

What We Like
High-quality
Durable
Easy to install
#TOP 3

Blue Ox BX88388 Washer Kit for Avail and Ascent Tow Bars

BX88388
Blue
0.75 inches
Blue Ox BX88388 Washer Kit for Avail and Ascent Tow Bars Cover
Blue Ox BX88388 Washer Kit for Avail and Ascent Blue Ox Tow Bars (Replaces 84-0196)

The Blue Ox Washer Kit is designed specifically for Avail and Ascent tow bars, making it a perfect accessory to keep your towing setup secure. This kit comes with 13 washers and four lock nuts, providing you with the essential components to maintain a tight and reliable connection. It is compatible with Blue Ox models BX4720 and BX4370, ensuring it fits well with these popular tow bars. Keep in mind that the tow bars themselves are sold separately, so this kit is ideal for those who need replacement washers or want to upgrade their existing setup for better performance and safety.

What We Like
Includes washers and lock nuts
Compatible with specific Blue Ox models
Ensures secure towing connections
Replacement for older kits
#TOP 4

Fugedox 1" Tang Spindle Washer for EZ Lube Axles

5-101
1 inches
Fugedox 1" Tang Spindle Washer for EZ Lube Axles Cover
Fugedox 4 Pack 1" Tang Spindle Washer for Spindle Tang Washer 2k to 7k EZ Lube Axles 3,500-7,000 lb

Fugedox Spindle Washer is designed for 3,500-7,000 lb. EZ-Lube Axles. It features a 1" D-style tang spindle washer suitable for old style EZ-Lube spindles with 1"-14 castle nuts. This washer ensures a secure fit for your axles, providing stability and safety during use. The Fugedox Spindle Washer simplifies maintenance and enhances the longevity of your axles. It is a reliable choice to keep your vehicle running smoothly.

What We Like
Secure fit for axles
Enhances axle longevity
Easy maintenance
#TOP 5

AP Products 014-119215 1" D-Flat Spindle Washer

014-119215
Black
1 inch
AP Products 014-119215 1" D-Flat Spindle Washer Cover
AP Products 014-119215 Washers - 1" D-Flat Spindle, Single Pack

The AP Products Spindle Washer is designed to serve as a reliable replacement part, perfect for maintaining or repairing your vehicle's brake system. With a 1-inch size, this washer fits precisely on D-flat spindles, ensuring a secure and proper fit. You get a single washer in each package, making it easy to replace the worn-out part without buying in bulk. Crafted from quality materials, this washer offers durability and dependable performance to keep your brake assembly functioning smoothly and safely.

What We Like
Durable material
Precise 1-inch size
Single pack convenience
Brake assembly compatibility
#TOP 6

GoldPlug 14mm Aluminum Crush Washer SW-02 5-Pack

NCOREDSHKF7575
Silver
14mm
GoldPlug 14mm Aluminum Crush Washer SW-02 5-Pack Cover
GoldPlug 14mm Aluminum Crush Washer SW-02-5-Pack, 14.3mm ID x 22.2mm OD x 2mm Thick

The GoldPlug Aluminum Crush Washer is designed to replace your old oil drain plug gasket easily, making maintenance hassle-free. This product ensures a secure seal every time you change your oil, helping you avoid messy leaks and costly repairs. Using a new washer with each oil change acts as a reliable safeguard against potential leaks, giving you peace of mind on the road. Plus, it is an affordable solution that provides excellent value, so you don’t have to worry about spending too much on essential car maintenance parts.

What We Like
Easy installation
Leak prevention
Regular replacement recommended
Cost-effective
#TOP 7

Gugaguga 2 Pack Thread Adapters and Washers

Adapter
Black
Gugaguga 2 Pack Thread Adapters and Washers Cover
2 Pack Thread Adapters and Washers, 1/2 * 28-3/4 * 16, Black

The Gugaguga 2 Pack Thread Adapters and Washers are essential car transmission washers that every car owner should have. This pack includes 2 knurl thread adapters and 2 rubber washers made of high-quality steel. These adapters are designed to replace broken parts and prevent leaking, ensuring a tight seal. With dimensions of 0.99'' in length, 0.98'' in width, and a 0.47'' inner diameter, they are compact and lightweight, weighing only 73g. The steel construction makes them more durable and harder, providing long-lasting performance. The rubber washers included in the pack seal tightly, further enhancing the leak prevention. Installing these thread adapters is a breeze, simply remove the worn-out part, replace it with the new adapter and washer using the provided tool. Upgrade your car transmission with the Gugaguga Thread Adapters and enjoy a leak-free and smooth driving experience.

What We Like
Durable steel construction
Prevents leaking
Easy installation
#TOP 8

SCUARI Oil Filter Thread Adapter 2 Pack

3000SPQ001
SCUARI Oil Filter Thread Adapter 2 Pack Cover
SCUARI 2 Pack Oil Filter Adapter,Car Accessories 1/2x28 to 3/4 x16 Thread Adapter with Rubber Crush Washer,Black Metal Thread Protector Replacement Kit,Applicable to Most Vehicle Models

The SCUARI Thread Adapter Set is made from durable metal and rubber, ensuring long-lasting use without fading or deformation thanks to its black anodized finish. This set includes two knurled adapters and four rubber washers, making it easy for you to store and carry them along with other vehicle parts. The compact size fits most vehicles, but be sure to check your car’s specific measurements before buying. Installation is simple—even if you’re not a professional, you can quickly replace worn parts and washers using basic tools, preventing loosening and leaks for reliable performance.

What We Like
Durable metal and rubber materials
Black anodized finish
Includes washers and adapters
Compact and portable design
Easy installation process
#TOP 9

GM Genuine Parts Front Differential Carrier Washer 12471621

12471621
Black
GM Genuine Parts Front Differential Carrier Washer 12471621 Cover
GM Genuine Parts 12471621 Front Differential Carrier Washer

The GM Front Differential Washer is crafted with precision and tested to meet high standards, ensuring reliable performance for your vehicle. Originally part of the ACDelco GM Original Equipment line, this washer maintains the trusted quality you expect. Designed by GM engineers specifically for Chevrolet, Buick, GMC, and Cadillac vehicles, it fits perfectly and supports optimal function. Additionally, GM continuously updates its parts with the latest materials and technology, giving you a durable and modern component that enhances your car’s transmission system. Choosing this washer means you get genuine, well-designed parts that work seamlessly with your car.

What We Like
High-quality engineering
Reliable OE fit
Updated materials
Tested for durability
#TOP 10

xyocx Spindle Tang Washer 1" 8 Pack

3500
1 inch
xyocx Spindle Tang Washer 1" 8 Pack Cover
xyocx Replacement Trailer Spindle Washer Trailer Tang Washer for EZ Lube Spindle Wheel Axles 2000 to 7000 lb (8 Pack)

xyocx Tang Washer 8 Pack is a set of 1" thick metal washers designed for EZ Lube Spindles/Axles from 2K to 7K lbs. These washers are crucial for maintaining your car's transmission system, ensuring smooth operation. With a pack of 8, you have spares for future replacements, providing peace of mind. The inner diameter of 1" fits perfectly for 3,500-7,000 lb. EZ-Lube Axles, making installation hassle-free and compatible with various vehicles.

What We Like
Durable 1/32" Metal
Convenient 8 Pack
Compatible with Various Axles
Buying Guide Image

Frequently Asked Questions (FAQs)

1. What size is the transmission drain plug crush washer?

The transmission drain plug crush washer is 18mm in size. This washer is designed to provide a tight seal and prevent leaks when installing or replacing the drain plug on the transmission.

2. What size is the CVT drain plug washer on a Honda Civic?

The CVT drain plug washer on a Honda Civic is also 18mm in size. It is an aluminum crush washer that fits most Honda transmission drain plugs. This washer is essential for creating a secure and leak-free seal when working with the CVT drain plug.

3. Can I use a regular washer instead of a crush washer?

While a crush washer is recommended for fluids or gases that require a tight seal, you can use a regular washer as an alternative in situations where a tight seal is not crucial or if you are on a tight budget. However, keep in mind that a crush washer provides a better seal and is specifically designed for applications where a secure and leak-free connection is required.

4. Is a crush washer necessary?

A crush washer is necessary for certain applications, particularly when working with open aperture muzzle devices like the standard A2 birdcage flash hider. However, it is not recommended to use crush washers on baffle style muzzle devices with a clearance hole that is only slightly larger than the bullet. In such cases, alternative methods for securing the muzzle device should be considered.

5. What size is the Honda oil drain plug washer?

The size of the Honda oil drain plug washer is not specifically mentioned in the provided reference answer. However, it is generally recommended to replace the oil drain plug washer with each oil change to ensure a proper seal and prevent leaks.

Editor's Notes

During our car transmission washer research, we found 24 car transmission washer products and shortlisted 10 quality products. We collected and analyzed 10,192 customer reviews through our big data system to write the car transmission washers list. We found that most customers choose car transmission washers with an average price of $12.12.

The car transmission washers are available for purchase. We have researched hundreds of brands and picked the top brands of car transmission washers, including Mission Automotive, GM GENUINE PARTS, Blue Ox, Fugedox, AP Products. The seller of top 1 product has received honest feedback from 9,118 consumers with an average rating of 4.9.

Written by
Robert Reyes Avatar

Robert Reyes is a dedicated writer from San Francisco with a bachelor of degree in mechanics and a bachelor of degree in marketing. He focuses on making some complicated topics simple and enjoys explaining complex and technical things in an easy-to-understand way.