Best Manual Transmission Input Shaft Seals of 2025

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Manual Transmission Input Shaft Seals are an essential component of any manual transmission system. These seals are designed to prevent fluid leakage from the input shaft, which can cause damage to the transmission and reduce its performance. Made from high-quality materials, these seals are durable and long-lasting, providing reliable protection against leaks and ensuring the smooth operation of the transmission. They are easy to install and are compatible with a wide range of manual transmission systems, making them a must-have for any automotive repair shop or DIY mechanic. Overall, Manual Transmission Input Shaft Seals are an essential part of any transmission system and are a smart investment for anyone looking to maintain their vehicle's performance and reliability.
At a Glance: Our Top Picks
Top 10 Manual Transmission Input Shaft Seals
National 711025 Input Shaft Seal
The National Input Shaft Seal is a spring-loaded, multi-lip seal that offers superior thermal protection, good abrasion resistance, and the ability to run dry. This seal can withstand temperatures from -30°F to 325°F (-34°C to 163°C), ensuring reliable performance for all repair needs. The spring-loaded design helps to maintain a tight seal, preventing leaks. The multi-lip feature enhances durability, making it ideal for various manual transmission repairs. With this seal, you can trust in its quality and performance.
National 710157 Input Shaft Seal
The National Input Shaft Seal is designed to perform reliably under various conditions. With a temperature range from -40°F to 225°F, it ensures excellent performance even in extreme cold. You’ll appreciate its low temperature capability, which means it maintains its integrity in chilly environments. Additionally, the seal exhibits low swell in hydrocarbon fluids, making it a dependable choice for various repairs. This spring-loaded, multi-lip design provides a secure fit, enhancing the overall durability and effectiveness of your manual transmission system.
National 223253 Man Trans Input Shaft Seal
The National Input Shaft Seal is designed with a spring-loaded, multi-lip feature that ensures reliable performance in various repair jobs. With a temperature range from -20°F to 300°F, it can withstand extreme conditions. This seal is resistant to EP lubricants and has low swell in hydrocarbon fluids, making it compatible with most oils. Its Polyacrylate material provides high resistance to oxidation and ozone, ensuring durability and longevity for your manual transmission needs.
National Manual Input Shaft Seal
National Input Shaft Seal by National is a spring-loaded, multi-lip seal with excellent high-temperature capabilities, suitable for temperatures ranging from -40°F to 400°F (-40°C to 204°C). This seal is compatible with a wide range of fluids, ensuring quality and reliable performance for all repair needs. The design ensures a secure fit, preventing leaks and maintaining optimal transmission function.
GM Genuine Parts Input Shaft Seal
GM Input Shaft Seal is the recommended replacement part for your GM vehicle's original factory component. It offers the quality, reliability, and durability of GM OE. This seal is manufactured to GM OE specification for fit, form, and function, ensuring it meets the highest standards. By using this seal, you can trust that it will seamlessly replace your original part, providing you peace of mind while driving your GM vehicle.
PartCatalog Manual Transmission Input Shaft Seal
The PartCatalog Input Shaft Seal is designed specifically for your Mitsubishi Eclipse, ensuring a perfect fit and hassle-free installation. By meeting or exceeding original equipment performance standards, this seal provides reliability and durability that you can trust. You can easily replace your old seal without complicated procedures, allowing you to get back on the road quickly. Plus, its compatibility with a range of vehicle models guarantees that you receive optimal performance tailored to your needs. This seal is essential for maintaining the efficiency of your manual transmission.
Nissan Manual Transmission Input Shaft Seal - MyParts
The MyParts Input Shaft Seal is designed specifically for your Nissan's manual transmission, ensuring a perfect fit for rear-wheel drive models with a five-speed setup. This replacement part is manufactured using modern tooling, which guarantees high quality and reliability. It serves as an upgraded option compared to the original materials, providing enhanced durability. Installation is straightforward, allowing you to replace the old seal seamlessly, just like the factory unit. Each product undergoes thorough inspection to ensure it meets rigorous standards, giving you peace of mind on the road.
Genuine Manual Transmission Seal
The Genuine Input Shaft Seal is engineered for reliable and consistent performance, ensuring that it meets your vehicle's specific needs. Crafted from high-quality materials, this seal offers exceptional durability, protecting your transmission from leaks and wear over time. It is manufactured to meet or surpass stringent quality standards, giving you confidence in its performance. If you ever have questions or need assistance with fitment for your vehicle, customer support is readily available to help. This seal is a smart choice for anyone looking to maintain their vehicle's transmission efficiently.
PartCatalog Manual Transmission Input Shaft Seal
The PartCatalog Input Shaft Seal is an essential component for your Chevrolet C10 Pickup, designed for models from 1968 to 1974. This replacement seal ensures exceptional quality and performance, matching or surpassing the original parts. You’ll appreciate the straightforward installation process, allowing you to replace the seal without any hassle. It’s tailored specifically for your vehicle, guaranteeing a perfect fit that helps maintain optimal performance. Be sure to check the specifications to ensure compatibility, so you can enjoy a seamless replacement experience.
PartCatalog Manual Transmission Seal
The PartCatalog Transmission Input Seal is an ideal replacement for your Volkswagen Jetta's manual transmission. This seal is crafted to match the original part, ensuring a hassle-free installation process. You won't have to worry about compatibility, as it fits a wide range of Jetta models from 2000 to 2018. With its high-quality design, you can expect performance that meets or exceeds the standards of your vehicle's original equipment. Enjoy the peace of mind that comes with a perfect fit and reliable operation every time you drive.
Frequently Asked Questions (FAQs)
1. What are the symptoms of a bad shaft seal?
One of the most common symptoms of a bad shaft seal is fluid leaking from the front of the transfer case. The rubber seals can dry out or crack, leading to leaks of gear oil or transmission fluid.
2. How much does it cost to replace transmission shaft seal?
The cost of replacing a rear transmission shaft seal can range from $600 to $900. Factors such as location and the type of car can affect the overall cost. The rear transmission seal, also known as the rear main seal, is positioned between the engine and transmission to prevent oil leaks.
3. What type of seals are used where the drive shafts enter into the gearbox?
Oil seals are used to seal rotating shafts and protect the gearbox from dirt and prevent lubricant leakage.
4. Are transmission seals easy to replace?
While most seals are affordable and easy to replace, some may require extensive dismantling to access. For instance, replacing gearbox oil seals usually requires removing the gearbox, making it a task best left to a professional garage.
5. What happens if shaft seal breaks?
When CV axle shaft seals fail, fluid can leak from the transmission and differential. This leakage can lead to overheating and potential damage to the transmission or differential.
6. How do you know if a mechanical seal is failing?
Signs of a failing mechanical seal include grooves, notches, squealing or popping sounds, uneven wear track, fractured or cracked seal face, cracked or chipped seal ring, and accumulation of carbon dust on the outside of the seal.
7. 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's important to address the problem and fix the seal to ensure proper transmission function and avoid further damage.
8. How serious is a transmission seal leak?
A leaking transmission seal should not be ignored as it can worsen over time. If left untreated, the transmission may not perform as intended, resulting in delayed engagement when placed in gear.
9. What are the different types of shaft seals?
There are three basic types of shaft seals: A, B, and C. If the seal has a dust lip, an S is added. If it seals for two different fluids from both directions, a D is added. The type O indicates no garter spring.
10. How many seals does a manual transmission have?
In front-wheel drive vehicles, there are typically two rear transmission seals, one for each axle. These seals, also referred to as the output shaft seal or driveshaft seal, prevent fluid from escaping where the driveshaft yoke enters the transmission.
During our manual transmission input shaft seal research, we found 24 manual transmission input shaft seal products and shortlisted 10 quality products. We collected and analyzed 2,964 customer reviews through our big data system to write the manual transmission input shaft seals list. We found that most customers choose manual transmission input shaft seals with an average price of $16.98.
The manual transmission input shaft seals are available for purchase. We have researched hundreds of brands and picked the top brands of manual transmission input shaft seals, including National, GM, PartCatalog, MyParts, Genuine. The seller of top 1 product has received honest feedback from 385 consumers with an average rating of 4.7.

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.