Best Car Transmission Washers of 2025

Robert Reyes Avatar
Robert Reyes
Last Updated: Jan 8, 2025

* We independently evaluate all recommended products and services. If you click on links we provide, we may receive compensation.

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

Transmission Parts Direct TH400 Washer Kit Cover #TOP 1
Transmission Parts Direct TH400 Washer Kit
ftb score rating icon 9.9
Dorman 618-013.1 Spindle Washer Cover #TOP 2
Dorman 618-013.1 Spindle Washer
ftb score rating icon 9.8
Atro Poly Kenworth Washer PL1066 Cover #TOP 3
Atro Poly Kenworth Washer PL1066
ftb score rating icon 9.6

Top 10 Car Transmission Washers

#TOP 1

Transmission Parts Direct TH400 Washer Kit

Transmission Parts Direct TH400 Washer Kit Cover
Transmission Parts Direct (K34907) GM TH400 Washer Kit w/Popular Selectives

The Transmission Parts Direct Washer Kit is a high-quality auto part designed specifically for car transmission washers. With package dimensions of 2.0 cms L x 9.2 cms W x 10.8 cms H, this kit is compact and easy to store. It includes 1 washer kit, making it convenient for replacing or repairing transmission washers. The product is made in the United States, ensuring its quality and reliability. The Transmission Parts Direct Washer Kit is an essential component for maintaining the performance and functionality of your car's transmission system.

What We Like
High-quality
Compact design
Convenient for replacement or repair
#TOP 2

Dorman 618-013.1 Spindle Washer

618-013.1
Multicolor
Dorman 618-013.1 Spindle Washer Cover
Dorman (618-013.1) 13/16" I.D. x 1-21/32" O.D. Spindle Washer

The Dorman Spindle Washer is a reliable component designed for car transmission systems. With package dimensions of 5 inches long, 0.75 inches high, and 3 inches wide, it’s compact and easy to store. Weighing only 0.88 pounds, it won’t add unnecessary bulk to your toolkit. Manufactured in Taiwan, this part ensures quality and durability. The part number, 618-013.1, makes it easy to find and identify. This spindle washer is essential for maintaining the integrity of your vehicle’s transmission, providing you with peace of mind on the road.

What We Like
Compact size
Lightweight design
Easy identification
Durable construction
#TOP 3

Atro Poly Kenworth Washer PL1066

Atro
PL1066
Blue
Atro Poly Kenworth Washer PL1066 Cover
Atro PL1066 Transmission Washer replacement for Kenworth K363-275

Atro Poly Transmission Washer PL1066 is a U.S.A. made product designed for your car's transmission needs. With an inner diameter of 1 1/8" and an outer diameter of 2 1/4", this washer, also known as "Brownie Mount," is crucial for ensuring a proper fit with PL1064. The 3/8" thickness provides durability and stability for your transmission components. Trust Atro for quality and reliability in your vehicle maintenance.

What We Like
U.S.A. made
Durable and stable
Ensures proper fit
#TOP 4

GM Genuine Parts Transmission Output Shaft Flange Washer

GM Parts
19299751
GM Genuine Parts Transmission Output Shaft Flange Washer Cover
GM Genuine Parts 19299751 Transmission Output Shaft Flange Washer

GM Flange Washer is a transmission output shaft flange washer designed, engineered, tested, and warranted specifically for GM vehicles. Its precise fit ensures easy installation, saving you time and effort. By locating your nearest GM dealer, independent service center, or body shop for proper installation, you can guarantee a seamless process. This washer is a reliable choice for maintaining your vehicle's transmission system.

What We Like
Precise fit
Designed for GM vehicles
Tested and warranted
#TOP 5

Dorman Copper Washer Pack

725-013
Bronze
Dorman Copper Washer Pack Cover
Dorman 725-013 Copper Washer-1/32 In. x 3/8 In. x 9/16 In. Natural., 50 Pack

The Dorman Copper Washer Pack includes 50 pieces of 1/32 In. x 3/8 In. x 9/16 In. natural washers. These washers are designed for car transmission use and are made in the United States. The package dimensions are 6 L x 1.5 H x 4 W (inches) and the package weight is 0.1 pounds.

What We Like
50 pieces in a package
Made in the United States
Designed for car transmission use
#TOP 6

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 , Blue

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 7

JS Professional Parts Copper Washers

JS Professional Parts
JSPPCOPPER103
JS Professional Parts Copper Washers Cover
JSPP-Ford- Copper Housing Washers - 9" Inch & 8" Ford Rear end Axle

The JS Copper Washers are designed for use with Ford 8" and 9" rear end axles, ensuring a perfect fit for your vehicle. Made in the USA, these washers are crafted from durable copper, which enhances their longevity and effectiveness. You can trust that these replacements match the original parts precisely, providing seamless compatibility and optimal performance. Rigorous durability testing means you receive a product that stands up to the demands of your vehicle, giving you peace of mind on the road.

What We Like
Made in USA
Durable copper material
Exact fit for Ford axles
Thorough durability testing
#TOP 8

AP Products Washer 014-119216

014-119216
Regular
Pack of 1
AP Products Washer 014-119216 Cover
AP Products 014-119216 Washer (Pack of 1)

AP Products Washer 014-119216 is a lightweight car transmission washer that weighs only 2.4 ounces. It can be easily shipped within the U.S. and to select countries internationally. The compact package dimensions of 4.8 x 3.7 x 0.5 inches make it convenient to store. With the manufacturer part number 14119216, this washer ensures compatibility with your transmission needs. The item model number is also 14119216, providing easy identification for your convenience.

What We Like
Lightweight
Easy to ship
Compact size
#TOP 9

Dorman 725-002 Copper Washer

725-002
Copper
Dorman 725-002 Copper Washer Cover
Dorman 725-002 Copper Washer-1/16 In. x 5/16 In. x 11/16 In., 50 Pack Universal Fit

The Dorman Copper Washer is an excellent choice for those needing a reliable replacement for various automotive tasks. Its durable construction ensures it can handle the demands of automotive applications, providing you with peace of mind during repairs. This washer is versatile, making it suitable for both automotive and household uses, so you can tackle multiple projects with one product. Additionally, the washer has been rigorously tested to guarantee a perfect fit and long-lasting performance, ensuring that you won’t have to worry about frequent replacements.

What We Like
Direct replacement for original washers
Durable for automotive use
Versatile for many applications
Extensively tested for quality
#TOP 10

Phoenix 4T40E 4T45E Washer Kit

Phoenix 4T40E 4T45E Washer Kit Cover
4T40E 4T45E Transmission Thrust Washer Kit 1995 and Up for Compatible with GM Buick

The Phoenix Transmission Washer Kit is designed for 1995 and newer GM Buick vehicles. One of the standout features is that parts are shipped daily, ensuring you receive your order promptly. This means you won't have to wait long to get your vehicle back on the road. Additionally, the kit is specifically tailored for car transmission applications, making it easy to find the right fit for your needs. With its reliable quality from Phoenix Transmission Parts, you can trust that you're making a solid investment in your vehicle's performance.

What We Like
Fast shipping
Vehicle-specific design
Reliable quality
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 4,793 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 $12.58.

The car transmission washers are available for purchase. We have researched hundreds of brands and picked the top brands of car transmission washers, including Transmission Parts Direct, Dorman, Atro, GM Parts, General Motors. The seller of top 1 product has received honest feedback from 17 consumers with an average rating of 3.7.

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.