---
product_id: 398959733
title: "National 4278 Differential Pinion Seal"
brand: "national"
price: "€ 0.41"
currency: EUR
in_stock: false
reviews_count: 5
url: https://www.desertcart.fi/products/398959733-national-4278-differential-pinion-seal
store_origin: FI
region: Finland
---

# Compatible with diverse fluids Withstands up to 400°F Spring-loaded multi-lip design National 4278 Differential Pinion Seal

**Brand:** national
**Price:** € 0.41
**Availability:** ❌ Out of Stock

## Summary

> 🔥 Seal the deal with National’s ultimate heat-defying pinion seal!

## Quick Answers

- **What is this?** National 4278 Differential Pinion Seal by national
- **How much does it cost?** € 0.41 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/398959733-national-4278-differential-pinion-seal)

## 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

- • **Heat-Resistant Powerhouse:** Operates flawlessly from -40°F to 400°F, built for extreme conditions.
- • **Fluoroelastomer Durability:** Premium material guarantees long-lasting performance and resistance.
- • **Trusted Legacy Performance:** Backed by 75+ years of industry-leading sealing innovation.
- • **Fluid Compatibility Champion:** Seals effectively with a wide range of automotive fluids, no compromises.
- • **Precision Spring-Loaded Seal:** Multi-lip design ensures a tight, reliable fit every time.

## Overview

The National 4278 Differential Pinion Seal features a spring-loaded, multi-lip design crafted from durable fluoroelastomer. Engineered to perform reliably across a wide temperature range (-40°F to 400°F) and compatible with various automotive fluids, it delivers long-lasting, high-quality sealing solutions trusted by professionals for over 75 years.

## 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

- 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
- Material: Fluoroelastomer
- Design type: Spring loaded; multi-lip
- Temperature range: Minus 40 degree Fahrenheit to 400 degree Fahrenheit
- Excellent high temperature capabilities and compatible within a wide range of fluids
- Provides long life while providing superior performance

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Federal Mogul |
| Brand | NATIONAL |
| Product Dimensions | 10.16 x 1.91 x 0.25 cm; 9.07 g |
| Item model number | 4278 |
| Manufacturer Part Number | 4278 |
| Item Weight | 9.07 g |

## Product Details

- **Material:** Fluoroelastomer
- **Brand:** NATIONAL
- **Package information:** Bottle
- **Liquid volume:** 946 Milliliters
- **Item weight:** 0.02 Pounds

## Images

![National 4278 Differential Pinion Seal - Image 1](https://m.media-amazon.com/images/I/712YEXhMTvL.jpg)
![National 4278 Differential Pinion Seal - Image 2](https://m.media-amazon.com/images/I/612b5B9ppDL.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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 







  
  
    Good
  

*by L***I on Reviewed in the United States on 22 March 2024*

Good

### ⭐⭐⭐⭐⭐ 







  
  
    Good product
  

*by S***S on Reviewed in Canada on 19 June 2023*

Met our needs, great price

### ⭐⭐⭐⭐⭐ 







  
  
    Perfect replacement.
  

*by D***E on Reviewed in the United States on 18 January 2024*

Exact fit replacement. Easy to install.

## Frequently Bought Together

- National 4278 Differential Pinion Seal for Ford F-150
- Valvoline FlexFill Full Synthetic SAE 75W-140 Gear Oil 1 QT Pouch

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**Shop now:** [https://www.desertcart.fi/products/398959733-national-4278-differential-pinion-seal](https://www.desertcart.fi/products/398959733-national-4278-differential-pinion-seal)

---

*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-02-13*