Automatic Transmission Shaft Seal National 710709 Rubber Multi-Lip

Description

Product Overview

The National 710709 Automatic Transmission Shaft Seal is engineered to meet the demanding requirements of modern automatic transaxles. Constructed from a premium rubber compound, the seal delivers exceptional resistance to heat, oil, and chemical exposure, ensuring a leak‑free barrier between the transmission housing and the output shaft. Its multi‑lip, spring‑loaded design provides a tight, self‑adjusting fit that accommodates slight shaft movement while maintaining consistent sealing pressure. The seal measures 2.75 inches in length and 0.69 inches in width, a compact profile that fits easily into tight engine bays without sacrificing performance.

Designed for a temperature range of -30°F to 325°F (-34°C to 163°C), this seal remains flexible in cold conditions and retains its integrity under high‑temperature operation. The machined exterior surface reduces friction during installation, allowing technicians to seat the seal quickly and accurately. With a weight of just 0.352 ounces, the component adds minimal mass to the drivetrain, preserving overall vehicle efficiency while delivering robust protection against fluid loss.

National, a trusted name in automotive components, has incorporated its extensive experience into the 710709 model. The seal carries the National brand and model identifier, reinforcing confidence in its quality and compatibility. It is listed as #3 in the Automotive Replacement Automatic Transaxle Output Shaft Seals category, reflecting its popularity among professionals and hobbyists alike. The product’s UPC 019826202482 and ASIN B01LYEBHZW provide easy reference for inventory management and online ordering.

Usage

This seal is ideal for a wide range of automatic transmission repair and maintenance tasks. Whether you are rebuilding a transmission, replacing a worn output shaft seal, or performing routine preventative maintenance, the 710709 seal offers a reliable solution. Its rubber composition tolerates exposure to transmission fluid, synthetic oils, and additives, making it suitable for both OEM and aftermarket applications.

Professional mechanics will appreciate the seal’s ease of installation, which reduces labor time and minimizes the risk of damage to surrounding components. DIY enthusiasts can also benefit from the clear dimensions and straightforward mounting process, allowing confident installation without specialized tools. The seal performs well in high‑performance vehicles, off‑road trucks, and everyday commuter cars, providing consistent sealing across diverse operating conditions.

Because the seal is designed to handle extreme temperature fluctuations, it is particularly useful in climates that experience harsh winters or hot summers. The durability of the rubber compound ensures that the seal will not become brittle in cold weather, nor will it soften excessively in hot environments, maintaining a reliable seal throughout the vehicle’s service life.

Why Choose Us

Choosing the National 710709 seal means selecting a product backed by decades of automotive expertise. National’s rigorous quality control processes include material testing, dimensional verification, and performance validation, guaranteeing that each seal meets exacting standards before it reaches the customer. This commitment to quality translates into fewer warranty claims and greater peace of mind for both installers and vehicle owners.

Our distribution network ensures rapid delivery and reliable stock availability, so you can keep your workshop running smoothly without unexpected delays. In addition, National provides comprehensive technical support, offering guidance on installation techniques, compatibility questions, and troubleshooting advice. This after‑sales service helps you resolve any challenges quickly, keeping downtime to a minimum.

Environmental responsibility is also a core value. The rubber used in the 710709 seal is formulated to be low‑VOC and recyclable where facilities exist, aligning with industry efforts to reduce ecological impact. By choosing this seal, you support a product that balances performance with sustainability.

Key Features

• Premium rubber compound provides excellent heat, oil, and chemical resistance for long‑lasting performance.
• Multi‑lip, spring‑loaded design ensures a tight, self‑adjusting seal that adapts to shaft movement.
• Wide operating temperature range from -30°F to 325°F keeps the seal flexible in cold weather and stable in hot conditions.
• Compact dimensions and machined exterior reduce friction, allowing quick and accurate installation.
• National’s dedicated technical support and warranty service give you confidence and assistance after purchase.

FAQ

What vehicles are compatible with the National 710709 seal?

The 710709 seal fits a broad range of automatic transmissions that use a standard output shaft size. It is commonly used in many domestic and import models from the early 2000s onward. Consult your vehicle’s service manual or contact our support team with your VIN to confirm exact compatibility.

Can I install the seal myself, or do I need professional help?

While professional installation is recommended for optimal results, the seal’s design allows competent DIY enthusiasts to install it with basic hand tools. The spring‑loaded, multi‑lip construction simplifies alignment, and the machined exterior reduces the chance of binding during installation.

How does the seal perform in extreme temperatures?

The seal’s rubber formulation is engineered to remain flexible at -30°F and retain its structural integrity up to 325°F. This wide temperature tolerance ensures reliable sealing in both cold winter climates and hot summer conditions, preventing leaks caused by material hardening or softening.

What warranty does National provide for this seal?

National offers a limited one‑year warranty covering material defects and premature failure under normal use. If the seal fails within the warranty period, contact our customer service for a replacement or refund, subject to proof of purchase.

Is the seal recyclable?

Yes, the rubber material used in the 710709 seal is designed to be recyclable where appropriate facilities exist. We encourage customers to follow local recycling guidelines to dispose of the seal responsibly after its service life.