NATIONAL OIL SEAL 240816 Federal Mogul Transmission

( Brand: National Oil Seal ), ( Manufacturer Part Number: 240816 ), ( Country Of Origin: United States ), ( Type: Oil Seal ), ( Items Included: Seal )

Review NATIONAL OIL SEAL Federal Mogul Transmission

The **National Oil Seal (Federal-Mogul) 240816 Transmission Seal** is a high-performance, precision-engineered sealing solution designed to maintain optimal lubrication and prevent fluid leakage in demanding automotive and industrial transmission applications. Crafted from durable **nitrile rubber (NBR)**, this seal is engineered to withstand the rigorous conditions found in automatic and manual transmissions, differentials, transfer cases, and other high-stress drivetrain components. Its robust construction features a **reinforced steel spring** that ensures consistent sealing pressure across a wide range of operating temperatures, from extreme cold starts to prolonged exposure to elevated heat typically encountered in heavy-duty vehicles, performance trucks, and off-road applications. The seal s **smooth, polished lip design** minimizes friction while maximizing contact with the shaft, reducing wear and extending both the seal s lifespan and the longevity of the surrounding transmission components. Additionally, the **high-quality elastomer compound** resists oil degradation, ozone, and fuel-based contaminants, making it ideal for use in modern fuel-efficient engines and vehicles operating in harsh environments. Whether replacing a worn-out factory seal or upgrading an existing system for enhanced reliability, the **Federal-Mogul 240816** delivers a dependable, long-lasting barrier against fluid loss and contamination, ensuring smooth operation and protecting transmission internals from premature failure. Backed by the trusted **National Oil Seal** brand a leader in sealing technology this seal is a reliable choice for mechanics, fleet operators, and DIY enthusiasts seeking a balance of performance, durability, and compatibility with a wide range of transmission designs.

### **Pros and Cons of Buying a National Oil Seal (Federal Mogul 240816) for Transmission Use**

1. **High Quality and Durability** Federal Mogul (now part of **Magna International**) is a well-established manufacturer known for producing reliable oil seals, including transmission seals. Their 240816 model is designed to withstand high pressures, temperatures, and mechanical stress, which is critical for transmission applications.

2. **Compatibility and Fit** This specific part (240816) is widely used in various transmission models, including those from **Ford, GM, Chrysler, and other OEMs**. It is often a direct replacement for factory seals, reducing the risk of installation issues.

3. **Extended Service Life** When properly installed and maintained, Federal Mogul seals are engineered to last longer than generic or aftermarket alternatives, reducing the frequency of replacements and potential transmission leaks.

4. **Temperature and Fluid Resistance** The seal is designed to handle transmission fluids (both conventional and synthetic) and extreme operating temperatures, preventing premature degradation.

5. **Warranty and Support** Federal Mogul parts often come with manufacturer warranties, and they are widely available through automotive suppliers, making replacements easier if needed.

6. **Reduced Risk of Contamination** A properly sealed transmission prevents fluid leaks, which can contaminate other components and lead to costly damage.

---

1. **Cost** Federal Mogul parts are premium-priced compared to generic or no-name brands. While the quality justifies the expense, it may be a significant investment for budget-conscious buyers.

2. **Installation Complexity** Transmission seals require precise installation to avoid damage to the seal lips or transmission components. Improper installation can lead to leaks or premature failure, potentially voiding warranties.

3. **Limited Availability in Some Regions** While widely stocked in North America and Europe, Federal Mogul parts may be harder to find in certain markets or through smaller auto parts retailers.

4. **Potential Counterfeit Risks** As with any high-demand part, there is a risk of purchasing counterfeit or low-quality imitations. Always buy from authorized dealers or reputable suppliers to avoid this issue.

5. **Not Always the Cheapest Option** If the transmission is old or near the end of its lifespan, replacing just the seal may not be cost-effective compared to a full transmission rebuild or replacement.

6. **Compatibility Verification Required** While the 240816 is a common size, it is essential to confirm exact fitment for your specific transmission model (e.g., **Ford 4R75E, GM 6T70, Chrysler 62TE**) to avoid mismatches.

---

### **Conclusion**

The **Federal Mogul 240816 transmission oil seal** is a high-quality, reliable choice for those seeking long-term performance and durability. Its superior materials and engineering make it a better investment than many generic alternatives, especially in high-stress applications. However, the higher cost and the need for careful installation must be considered.

For most drivers, the **pros outweigh the cons**, particularly if the transmission is otherwise in good condition. The seal s longevity and reduced risk of leaks justify the expense, provided it is installed correctly and sourced from a trusted supplier.

### **Recommendation**

If you are experiencing **transmission fluid leaks, unusual noises, or overheating**, and the issue is isolated to the seal, purchasing the **Federal Mogul 240816** is a strong recommendation. Ensure you:

- Verify exact compatibility with your transmission model.

- Have the seal installed by a professional to avoid damage.

- Use the correct transmission fluid and follow maintenance intervals.

If the transmission has other underlying issues (e.g., worn gears, clutch problems), a **full inspection or rebuild** may be more cost-effective in the long run. For most cases, however, this seal is a dependable upgrade.

Details:

National Oil Seal Federal Mogul Automatic Transmission 240816 Free Shipping in the USA S2.

part #: 240816 prices

• $13.64-$28.52

specifications autotransmissionsgo:

• brand: National Oil Seal
• mpn: 240816
• country of origin: United States
• type: Oil Seal
• items included: Seal

returns autotransmissionsgo:

• time: 30 Days
• policy: Returns Accepted
• paid by: Buyer

shipping autotransmissionsgo:

• carrier: USPS
• transit: 4-7 Days
• type: Fixed
• class: Standard
• cost: $0.00
• service: USPS Ground Advantage

general autotransmissionsgo:

• condition: New
• Car Truck Parts Accessories > Transmission Drivetrain > Automatic Transmission

payments autotransmissionsgo:

• other
• wallet: Google-pay
• credit card: Diners-club

offer autotransmissionsgo:

• started: March 12, 2026
• availability: In Stock
• quantity: 1
• options: Ship-to-home
• sold: 0

seller autotransmissionsgo:

• # reviews: 1809
• rating: 100.0%
• city: Redmond, Oregon

National Oil Seal 240816 Is Similar To:

• National 370021a 370021a Oil Bath Seal Genuine (44% similar) Direct line to the truck parts expert 917 335-7577. Over 50 years of truck parts experience...(November 24th, 2025)
• National 370022a 370022a Oil Bath Seal Genuine (44% similar) Direct line to the truck parts expert 917 335-7577. Over 50 years of truck parts experience...(November 24th, 2025)
• National 455018n Seal New Genuine Part (44% similar) Direct line to the truck parts expert 917 335-7577. Over 50 years of truck parts experience...(May 22nd, 2026)
• National 417490 415156n Seal New Genuine Part (40.8% similar) Over 50 years of truck parts experience. Direct line to the truck parts expert 917 335-7577...(May 27th, 2026)