Best Automatic Transmission Input Shaft Seals of 2025

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

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Automatic transmission input shaft seals are an essential component in any vehicle's transmission system. These seals are responsible for preventing fluid leaks and maintaining the proper pressure within the transmission. They are typically made of high-quality materials such as rubber or silicone to ensure durability and longevity. These seals are designed to fit snugly around the input shaft of the transmission, creating a tight seal that prevents any oil or fluid from leaking out. Investing in high-quality automatic transmission input shaft seals can save drivers from costly repairs and ensure their vehicle runs smoothly for years to come.

At a Glance: Our Top Picks

GM Auto Trans Input Shaft Seal Cover #TOP 1
GM Auto Trans Input Shaft Seal
ftb score rating icon 9.9
SKF 23000 Transfer Case Rear Output Shaft Seal Cover #TOP 2
SKF 23000 Transfer Case Rear Output Shaft Seal
ftb score rating icon 9.8
National 710062 Input Shaft Seal Cover #TOP 3
National 710062 Input Shaft Seal
ftb score rating icon 9.6

Top 10 Automatic Transmission Input Shaft Seals

#TOP 1

GM Auto Trans Input Shaft Seal

24224655
GM Auto Trans Input Shaft Seal Cover
General Motors 24224655, Auto Trans Input Shaft Seal

The GM Input Shaft Seal is a genuine ACDelco component designed specifically for your vehicle, ensuring a perfect fit and reliable performance. This fluid seal effectively prevents leaks, which can help maintain the integrity of your transmission system. By using this part, you can be confident that it meets high standards for design and function, providing peace of mind during operation. With its precise manufacturing, this seal promises to enhance the longevity of your vehicle's transmission, making it a smart choice for any car owner looking to improve their automotive maintenance.

What We Like
Genuine ACDelco quality
Prevents fluid leaks
Perfect vehicle fit
Enhances transmission longevity
#TOP 2

SKF 23000 Transfer Case Rear Output Shaft Seal

SKF
23000
SKF 23000 Transfer Case Rear Output Shaft Seal Cover
SKF 23000 Transfer Case Rear Output Shaft Seal Spring Loaded Auxiliary Dirt Lip with Excluder Dirt Boot Rubber Compatible with Dodge 1 Ton D300 D350 M300 M350 P300 P350 W300 W350

SKF Transfer Case Seal is designed with a spring-loaded auxiliary dirt lip and excluder dirt boot rubber for Dodge 1 Ton trucks. The seal construction type and nitrile seal lip material provide excellent dirt exclusion. SKF's synthetic rubber blends ensure durability in extreme temperatures, from -40 to 400 degrees Fahrenheit. The carbon steel components are rust-resistant, and the Bore-Tite coating fills imperfections for a leak-proof seal.

What We Like
Durable in extreme temperatures
Excellent dirt exclusion
Rust-resistant components
#TOP 3

National 710062 Input Shaft Seal

710062
National 710062 Input Shaft Seal Cover
National 710062 Trans Case Input Shaft Seal

The National Input Shaft Seal is designed for reliability and performance in automatic transmissions. With its spring-loaded, multi-lip design, it ensures a strong seal that prevents leaks. You can trust its effective low-temperature capability, which allows it to function well even in extreme cold, down to -40°F. Additionally, the seal exhibits minimal swelling in hydrocarbon fluids, making it a durable choice for various repairs. This product's temperature range and robust material ensure that you receive quality performance, providing peace of mind during your repair needs.

What We Like
Reliable performance
Effective in extreme temperatures
Low swelling in fluids
Durable nitrile material
#TOP 4

SKF Seal (4710)

SKF
4710

This SKF Seal (4710) helps to keep lubricants in and contaminants out, ensuring reliable performance even in extreme operating conditions. It has superior fluid and temperature compatibility, providing excellent contamination exclusion. The fit type is vehicle-specific and it falls under the category of automatic transmission input shaft seals.

What We Like
Provides reliable performance in extreme operating conditions
Excludes contamination effectively
Designed for vehicle-specific fit
#TOP 5

SKF 16485 Transfer Case Seal

SKF
16485
SKF 16485 Transfer Case Seal Cover
SKF 16485 Transfer Case Rear Output Shaft Seal Spring Loaded Dual Lip Multiple Fluid Control Compatible with Ford Aerostar Bronco II Excursion Expedition Explorer Sport

The SKF Transfer Case Seal is designed to provide exceptional performance for your vehicle, ensuring a reliable seal against dirt and contaminants. With its advanced synthetic rubber construction, it can withstand extreme temperatures, from -40°F to 400°F, making it ideal for various driving conditions. The high-quality carbon steel components are coated to resist rust, extending the seal's life. Additionally, the unique lip design meets or exceeds original equipment specifications, ensuring a tight and effective seal to keep your transmission fluid contained and functioning properly.

What We Like
Durable synthetic rubber material
High-temperature resistance
Rust-resistant carbon steel
Effective dirt exclusion
Long service life
#TOP 6

SKF Seal 16901 for Ford, Lincoln, Mazda, Mercury

SKF
16901
SKF Seal 16901 for Ford, Lincoln, Mazda, Mercury Cover
SKF Seal 16901 Aftermarket Replacement Part Compatible with Ford 1981-2012 Lincoln 1988-2002 Mazda 1993-2008 Mercury 1981-2008

The SKF Seal 16901 is designed to effectively keep lubricants contained while preventing contaminants from entering your vehicle's automatic transmission. This seal is made with optimized materials that ensure reliable performance even in extreme conditions, providing you with peace of mind during tough driving situations. Its superior compatibility with various fluids and temperatures means you can trust it to maintain efficiency, while excellent contamination exclusion helps prolong the life of your transmission. With this seal, you can enjoy a smoother and more reliable driving experience.

What We Like
Prevents lubricant leakage
Resists extreme conditions
Compatible with various fluids
Enhances transmission longevity
#TOP 7

SKF 9815 LDS & Small Bore Seal

SKF
9815
Grey
SKF 9815 LDS & Small Bore Seal Cover
SKF 9815 LDS & Small Bore Seal, R Lip Code, HM14 Style, Inch, 1" Shaft Diameter, 1.25" Bore Diameter, 0.125" Width

The SKF LDS & Small Bore Seal, also known as the SKF 9815, is a versatile seal designed for power transmission applications. It can be used as either a large diameter seal (LDS) or a small bore seal, making it suitable for various needs. The single steel case ensures durability, while the nitrile rubber construction provides chemical resistance and wear resistance. The sealing lip feature effectively minimizes contaminants, ensuring a clean and reliable seal. With its suitability for less demanding grease-lubricated applications operating at moderate speeds, the SKF LDS & Small Bore Seal offers convenience and reliability for a range of power transmission applications.

What We Like
Durable steel case
Chemical and wear resistance
Effective contaminant minimization
#TOP 8

SKF 21239 Transfer Case Input Shaft Seal

SKF
21239
SKF 21239 Transfer Case Input Shaft Seal Cover
SKF 21239 Transfer Case Input Shaft Seal Spring Loaded Dual Lip Compatible with Ford Aerostar Bronco II Excursion Expedition Explorer Sport Explorer Sport Trac Ranger 3/4 Ton F250

The SKF Input Shaft Seal is designed to provide exceptional performance in various automotive applications. Its shaft and bore dimensions ensure a perfect fit, while the durable seal lip design effectively keeps dirt and contaminants out, extending the seal's lifespan. The seal's synthetic rubber composition allows it to operate in extreme temperatures, from minus 40 to 400 degrees Fahrenheit, ensuring reliability even under harsh conditions. Additionally, the high-grade carbon steel construction is coated to prevent rust, enhancing the seal's durability and effectiveness in maintaining a leak-proof environment.

What We Like
Durable construction
Effective dirt exclusion
Wide temperature range
Long service life
#TOP 9

TRANSPEED 4L60E Transmission Oil Seal Set

4L60E
TRANSPEED 4L60E Transmission Oil Seal Set Cover
TRANSPEED 4L60E Auto Transmission Oil Seal Set, 4L60/E Input & Output Shaft Seals, Shift Oil Seal Compatible with Buick For Cadillac Chevy

The TRANSPEED 4L60E Seal Kit is designed to fit a variety of vehicles, including certain models from Buick, Cadillac, and Chevy. Made from high-quality synthetic rubber, these seals resist high temperatures and oil corrosion, ensuring durability over time. The precise design and optimized lip help you install them easily, minimizing the risk of leaks due to improper fitting. Plus, their user-friendly design makes replacing seals quick and efficient, which can save you both time and money on maintenance.

What We Like
Durable synthetic rubber material
Easy installation and fitting
Resistance to high temperatures
Cost-effective maintenance solution
#TOP 10

SKF 17284 Shaft Seal

SKF
17284
SKF 17284 Shaft Seal Cover
SKF, 17284, Shaft Seal, 1-3/4x2-7/16x5/16", CRW1, NBR

The SKF Shaft Seal is an essential auto part designed for automatic transmission input shafts. With compact dimensions of approximately 6.858 cm in length and width, and a height of 1.27 cm, this seal is easy to handle and install. Weighing only 5.01 lbs, it is lightweight, making it convenient for your automotive needs. Manufactured in the United States, you can trust its quality and reliability. This seal helps maintain proper sealing in your vehicle, preventing leaks and ensuring optimal performance, giving you peace of mind during your drives.

What We Like
Compact and lightweight design
Reliable quality from the USA
Prevents leaks effectively
Easy to install
Buying Guide Image

Frequently Asked Questions (FAQs)

1. How much does it cost to replace transmission shaft seal?

The cost of replacing a transmission shaft seal can range between $600 and $900. Factors such as your location and the type of car you own can affect the overall cost. This seal, also known as the rear main seal, is located between the engine and transmission. Its purpose is to prevent oil leakage and seal the crankshaft.

2. What are the symptoms of a bad shaft seal?

One common symptom of a faulty front output shaft seal is fluid leakage from the front of the transfer case. If the rubber seals in the transfer case dry out or crack, they can lead to leaks of gear oil or transmission fluid.

3. What causes a transmission seal to break?

Transmission seals in automatic transmissions can wear out and crack over time. This is often due to exposure to high temperatures or heat. Additionally, excessive transmission fluid can also contribute to the deterioration of these seals.

4. Can you drive with a bad transmission seal?

While it may be possible to drive with a leaking transmission seal, it is not advisable. It is recommended to address the issue promptly and have the seal replaced to prevent further damage or complications.

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

Signs of a bad input shaft include strange noises in neutral, persistent noises from the gears, and sudden gear slips. If you experience any of these symptoms, it is recommended to have your input shaft checked by a professional.

6. What happens when a transmission seal goes bad?

When transmission seals and gaskets fail, it can lead to fluid leaks that can cause significant damage to the transmission. Even though they are small parts, their failure can result in complete transmission failure.

7. Are transmission seals easy to replace?

While most transmission seals are inexpensive, they can be challenging to replace. Many seals are located in areas that require extensive dismantling to access. It is often recommended to have a professional handle the replacement, especially for gearbox oil seals that may require removing the entire gearbox.

Editor's Notes

During our automatic transmission input shaft seal research, we found 24 automatic transmission input shaft seal products and shortlisted 10 quality products. We collected and analyzed 2,218 customer reviews through our big data system to write the automatic transmission input shaft seals list. We found that most customers choose automatic transmission input shaft seals with an average price of $13.57.

The automatic transmission input shaft seals are available for purchase. We have researched hundreds of brands and picked the top brands of automatic transmission input shaft seals, including General Motors, SKF, National, TRANSPEED. The seller of top 1 product has received honest feedback from 221 consumers with an average rating of 4.6.

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.