---
product_id: 91960423
title: "National 4278 Differential Pinion Seal for 1999 - 2022 Ford F-150"
brand: "national"
price: "$25.15"
currency: USD
in_stock: true
category: "National"
url: https://www.desertcart.us/products/91960423-national-4278-differential-pinion-seal-for-1999-2022-ford-f
store_origin: US
region: United States of America
---

# High-temp resistant to 400°F Fits wide range of Ford models Spring-loaded multi-lip design National 4278 Differential Pinion Seal for 1999 - 2022 Ford F-150

**Brand:** national
**Price:** $25.15
**Availability:** ✅ In Stock

## Summary

> 🚀 Seal the deal with National – where performance meets precision!

## Quick Answers

- **What is this?** National 4278 Differential Pinion Seal for 1999 - 2022 Ford F-150 by national
- **How much does it cost?** $25.15 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/91960423-national-4278-differential-pinion-seal-for-1999-2022-ford-f)

## Best For

- national enthusiasts

## Why This Product

- Trusted national brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Fluid Compatibility:** Seals effectively against a broad spectrum of automotive fluids for versatile use.
- • **Trusted Legacy Brand:** National’s 75+ years of sealing expertise guarantees premium quality and reliability.
- • **Precision Fit for Ford:** Engineered to fit 1999-2022 Ford F-150 and multiple Transit & Econoline models perfectly.
- • **Advanced Multi-Lip Seal:** Spring-loaded design ensures superior leak protection and durability.
- • **Unmatched Heat Endurance:** Operates flawlessly from -40°F to 400°F, built for extreme conditions.

## Overview

The National 4278 Differential Pinion Seal is a premium, spring-loaded multi-lip seal designed for 1999-2022 Ford F-150 and select Transit and Econoline models. Engineered to withstand extreme temperatures from -40°F to 400°F and compatible with various automotive fluids, it delivers reliable, leak-proof performance backed by over 75 years of National’s industry expertise.

## Description

National has built a reputation as one of the most respected names in the industry. We have offered premium sealing solutions for more than 75 years. Our design team keeps pace with the industry and provides advanced solutions for today's vehicles.

## Features

- COMPATIBILITY – Fits 2015-2018 Ford Transit-150; 2015-2018 Ford Transit-250; 2015-2018 Ford Transit-350; 2015-2018 Ford Transit-350 HD; 2004-2004 Ford F-150 Heritage; 1999-1999 Ford E-150 Econoline; 2000-2000 Ford E-150 Econoline; 2001-2002 Ford E-150 Eco
- GET THE RIGHT PART -- Before purchasing, please check the “desertcart Confirmed Fit” bar to ensure this part will fit your vehicle; enter all vehicle information (year, make, model, engine and trim) for compatibility and check qualifier notes. If the “desertcart Confirmed Fit” bar has an “i” in a blue circle, this product has additional notes. Please hover over the “i” on the bar to see notes before making your purchase
- Design type: spring loaded; multi-lip
- Temperature range: -40°F to 400°F / -40°C to 204°C
- Excellent high temperature capabilities
- Compatible with wide range of fluids
- Delivers quality and reliable performance for every type of repair

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000C5J0U4 |
| Best Sellers Rank | #44,425 in Automotive ( See Top 100 in Automotive ) #1 in Automotive Replacement Differential Seals |
| Brand Name | National |
| Container Type | Bottle |
| Customer Reviews | 4.4 4.4 out of 5 stars (210) |
| Global Trade Identification Number | 00724956125289 |
| Included Components | Multi Purpose Seal |
| Item Form | Grease |
| Item Weight | 9.07 g |
| Liquid Volume | 946 ml |
| Manufacturer | National |
| Material | Fluoroelastomer |
| Model Number | 4278 |
| Number of Items | 1 |
| Part Number | 4278 |
| Recommended Uses For Product | Automotive |
| Specific Uses For Product | Automotive differentials |
| UPC | 724956125289 |
| Unit Count | 1 Count |
| Upper Temperature Rating | 400 °F |

## Product Details

- **Brand:** National
- **Item Weight:** 9.07 g
- **Liquid Volume:** 946 ml
- **Material:** Fluoroelastomer
- **Package Information:** Bottle

## Images

![National 4278 Differential Pinion Seal for 1999 - 2022 Ford F-150 - Image 1](https://m.media-amazon.com/images/I/712YEXhMTvL.jpg)

## Questions & Answers

**Q: Whats the id and od for this?**
A: Thank you for your inquiry. The National Pinion Seal 4278 fits a shaft diameter of 1.812" and the seal OD is 3.096"

**Q: Does this fit a 1968 ford 8 inch? Thanks**
A: Thank you for the question.  Sorry, the National 4278 is not cataloged for this year model vehicle.  Additional vehicle information is needed. Please follow catalog listings including fitment notes to determine correct application.

## Frequently Bought Together

- National 4278 Differential Pinion Seal for Ford F-150
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**Shop now:** [https://www.desertcart.us/products/91960423-national-4278-differential-pinion-seal-for-1999-2022-ford-f](https://www.desertcart.us/products/91960423-national-4278-differential-pinion-seal-for-1999-2022-ford-f)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-09-11*