Best Automatic Transaxle Output Shaft Seals of 2025

Robert Reyes Avatar
Robert Reyes
Last Updated: Jan 9, 2025

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Automatic transaxle output shaft seals are an essential component of a vehicle's transmission system. These seals are designed to prevent transmission fluid from leaking out of the transmission and onto the ground. They are located at the point where the output shaft of the transmission exits the transmission housing and connects to the drive axle. Over time, these seals can wear out and begin to leak, causing transmission fluid to be lost and potentially damaging the transmission. It is important to replace worn or damaged output shaft seals as soon as possible to ensure the continued smooth operation of the vehicle's transmission system.

At a Glance: Our Top Picks

Timken Auto Part Output Shaft Seal Cover #TOP 1
Timken Auto Part Output Shaft Seal
ftb score rating icon 9.8
GM Genuine Parts 8673526 Transmission Seal Cover #TOP 2
GM Genuine Parts 8673526 Transmission Seal
ftb score rating icon 9.7
National Auto Trans Output Shaft Seal Cover #TOP 3
National Auto Trans Output Shaft Seal
ftb score rating icon 9.5

Top 10 Automatic Transaxle Output Shaft Seals

#TOP 1

Timken Auto Part Output Shaft Seal

710630
Timken Auto Part Output Shaft Seal Cover
Timken 710630 Automatic Transaxle Output Shaft Seal

This Timken Auto Part Output Shaft Seal is a product designed to fit into an automatic transaxle. It has a single package that measures 7.111 cms L x 7.111 cms W x 1.777 cms H, and is made in China. This auto part is categorized as an Axle Shaft Seal, and comes in a package quantity of 1.

What We Like
Designed to fit into an automatic transaxle
Comes in a single package
Made in China
#TOP 2

GM Genuine Parts 8673526 Transmission Seal

GM
8673526
GM Genuine Parts 8673526 Transmission Seal Cover
GM Parts 8673526 Automatic Transmission Rear Output Shaft Seal

This automatic transmission rear output shaft seal is a GM-recommended replacement part for your vehicle's original factory component. It offers the same quality, reliability, and durability as GM OE. Manufactured to GM OE specification for fit, form, and function, this seal is designed to ensure a proper fit and prevent leaks.

What We Like
GM-recommended replacement part
Same quality, reliability, and durability as GM OE
Manufactured to GM OE specification for fit, form, and function
#TOP 3

National Auto Trans Output Shaft Seal

710709
National Auto Trans Output Shaft Seal Cover
National Oil Seals 710709 Auto Trans Output Shaft Seal

This automatic transaxle output shaft seal is designed with a spring-loaded and multi-lip design that provides good abrasion and dry running capability. It has superior thermal and chemical resistance with a temperature range of -30°F to 325°F / -34°C to 163°C. This output shaft seal delivers quality and reliable performance for every type of repair, ensuring that you get the best value for your money.

What We Like
Spring-loaded and multi-lip design
Superior thermal and chemical resistance
Good abrasion and dry running capability
#TOP 4

National Oil Seals 710314 Auto Trans Output Shaft Seal

710314
National Oil Seals 710314 Auto Trans Output Shaft Seal Cover
National Oil Seals 710314 Auto Trans Output Shaft Seal

National Output Shaft Seal is designed with a spring-loaded, multi-lip feature that ensures optimal performance in temperatures ranging from -20°F to 300°F. It resists EP lubricants and has low swell in hydrocarbon fluids, making it reliable for various repairs. The Polyacrylate material provides durability and compatibility with most oils. This seal offers high resistance to oxidation and ozone, ensuring longevity and efficiency in your vehicle's transmission system.

What We Like
Durable Polyacrylate Material
Wide Temperature Range
Resistance to EP Lubricants
#TOP 5

GM Genuine Parts Automatic Transmission Rear Output Shaft Seal

GM
8677463
GM Genuine Parts Automatic Transmission Rear Output Shaft Seal Cover
GM Parts 8677463 Automatic Transmission Rear Output Shaft Seal

GM Genuine Parts is a leading manufacturer of high-quality products, including this Automatic Transmission Rear Output Shaft Seal. Their products are designed with the professional in mind and are internationally renowned for their diverse range of award-winning products. They are fully equipped with state-of-the-art technology and constantly modernizing their devices to meet the demands of the modern user. This specific product is designed to fit vehicles specifically and is categorized as Automatic Transaxle Output Shaft Seals.

What We Like
High-quality products
Designed with the professional in mind
Internationally renowned for diverse range of award-winning products
#TOP 6

National Auto Trans Output Shaft Seal 710913

710913
National Auto Trans Output Shaft Seal 710913 Cover
National 710913 Auto Trans Output Shaft Seal

The National Output Shaft Seal is designed to provide excellent performance in various conditions. With a spring-loaded, multi-lip design, it ensures a tight seal that prevents leaks, which is crucial for maintaining your vehicle's efficiency. The seal operates effectively within a broad temperature range of -20°F to 300°F, making it suitable for diverse environments. Additionally, it shows strong resistance to extreme pressure lubricants and has minimal swelling in hydrocarbon fluids. This means you can trust it to perform reliably during every type of repair, giving you peace of mind on the road.

What We Like
Reliable sealing performance
Wide temperature compatibility
Resistant to EP lubricants
Low swelling in fluids
#TOP 7

Timken 710583 Output Shaft Seal

710583
Timken 710583 Output Shaft Seal Cover
Timken 710583 Automatic Transmission Output Shaft Seal

The Timken Output Shaft Seal is a reliable component designed for automatic transmissions. Manufactured in China, this seal ensures a proper fit with dimensions of 3.94 inches in length, 3.27 inches in width, and 1.16 inches in height. Weighing only 0.11 pounds, it is lightweight, making installation easier for you. This seal is categorized specifically for automatic transaxle output shafts, providing essential protection against leaks and enhancing the longevity of your vehicle's transmission system. With this seal, you can expect improved performance and reduced maintenance costs over time.

What We Like
Lightweight design
Easy installation
Prevents leaks
Enhances transmission longevity
#TOP 8

GM Genuine Parts Automatic Transmission Rear Output Shaft Seal

GM
24232325
GM Genuine Parts Automatic Transmission Rear Output Shaft Seal Cover
GM Parts 24232325 Automatic Transmission Rear Output Shaft Seal

This automatic transmission rear output shaft seal is a recommended replacement part for your GM vehicle's original factory component. Manufactured to GM OE specification for fit, form, and function, it offers quality, reliability, and durability. It is perfect for those who want to maintain their GM vehicle and keep it running smoothly. The product is made in the USA.

What We Like
Durable and reliable
Manufactured to GM OE specification
Recommended replacement part for GM vehicles
#TOP 9

National Auto Trans Output Shaft Seal

710582
National Auto Trans Output Shaft Seal Cover
National 710582 Auto Trans Output Shaft Seal

National Shaft Seal by National is a spring-loaded, multi-lip design with a temperature range from -40°F to 400°F (-40°C to 204°C). It boasts excellent high-temperature capabilities and compatibility with a wide range of fluids. This seal delivers quality and reliable performance for all repair needs, ensuring durability and efficiency in your vehicle's automatic transaxle output shaft. The spring-loaded design helps maintain a tight seal, while the multi-lip feature enhances protection against leaks, making it a dependable choice for your vehicle.

What We Like
Spring-loaded design
Wide temperature range
Compatible with various fluids
#TOP 10

National 4370N Trans Case Output Shaft Seal

4370N
National 4370N Trans Case Output Shaft Seal Cover
National 4370N Trans Case Output Shaft Seal

The National 4370N Trans Case Output Shaft Seal is designed with a spring loaded multi-lip that is resistant to EP lubricants and has low swell in hydrocarbon fluids. With a temperature range of -20°F to 300°F / -29°C to 49°C, this seal delivers quality and reliable performance for every type of repair. It falls under the category of Output Shaft Manual Transaxle Seals.

What We Like
Resistant to EP lubricants
Low swell in hydrocarbon fluids
Reliable performance for every type of repair
Buying Guide Image

Frequently Asked Questions (FAQs)

1. What are the symptoms of a bad transmission output shaft seal?

Signs of a bad transmission output shaft seal include stiffer gear changing, a grating sound in the lower part of the car, and unexpected connection and disconnection of the all-wheel drive. If you notice these symptoms, it may indicate damage to the output shaft seal.

2. How much does it cost to replace a transmission output seal?

The cost to replace a transmission output seal can vary. On average, it can range from around $150 to replace a seal to approximately $1,000 for a new torque converter. The cost will depend on factors such as the specific vehicle and the extent of the repair needed.

3. Can you drive with a leaking transmission seal?

While it may be technically possible to drive with a leaking transmission seal, it is not advisable. Continuing to drive with a leaking seal can lead to potential damage to your engine. It is recommended to address the issue and have the seal repaired as soon as possible.

4. Can you drive without a transmission seal?

Driving without a transmission seal is not recommended. A leaking transmission fluid can cause significant damage to your engine. It is important to have a functioning transmission seal to prevent fluid leaks and maintain the proper lubrication and operation of your transmission.

5. How do I know if my output shaft is bad?

While transmission output shafts typically last the life of a vehicle, they can occasionally fail. Common signs of a bad output shaft include odd vibrations while driving and unusual noises. This can be caused by bad bearings that cause the output shaft to wobble. If you suspect a problem with your output shaft, it is best to have it inspected by a professional.

6. Are transmission seals easy to replace?

Replacing transmission seals can vary in difficulty. While most seals are inexpensive, their location may require significant dismantling to access them. For example, gearbox oil seals often require the gearbox to be removed. It is generally recommended to have the task of replacing transmission seals done by a professional at a garage.

7. Should leaking seals be replaced or repaired?

Leaking seals should be replaced rather than repaired. Dry seals that have been in service for more than a year and show an increase in nitrogen consumption should have the seal cartridge replaced. When wet seals start to leak after running for a year or two, it is necessary to replace the cartridge to prevent further issues.

Editor's Notes

During our automatic transaxle output shaft seal research, we found 24 automatic transaxle output shaft seal products and shortlisted 10 quality products. We collected and analyzed 6,664 customer reviews through our big data system to write the automatic transaxle output shaft seals list. We found that most customers choose automatic transaxle output shaft seals with an average price of $10.57.

The automatic transaxle output shaft seals are available for purchase. We have researched hundreds of brands and picked the top brands of automatic transaxle output shaft seals, including TIMKEN, GM, National. The seller of top 1 product has received honest feedback from 385 consumers with an average rating of 4.7.

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.