---
product_id: 398959733
title: "National 4278 Differential Pinion Seal"
brand: "national"
price: "157.86 DT"
currency: TND
in_stock: true
category: "National"
url: https://www.desertcart.tn/products/398959733-national-4278-differential-pinion-seal
store_origin: TN
region: Tunisia
---

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

**Brand:** national
**Price:** 157.86 DT
**Availability:** ✅ In Stock

## Summary

> 🔥 Seal the deal with National’s high-temp, high-performance pinion seal!

## Quick Answers

- **What is this?** National 4278 Differential Pinion Seal by national
- **How much does it cost?** 157.86 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/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

- • **Trusted Industry Legacy:** Backed by 75+ years of premium sealing innovation.
- • **Unmatched Heat Resistance:** Performs flawlessly from -40°F to 400°F, no sweat.
- • **Fluoroelastomer Durability:** Engineered for longevity and superior chemical resistance.
- • **Precision Spring-Loaded Seal:** Multi-lip design ensures a tight, leak-proof fit every time.
- • **Versatile Fluid Compatibility:** Seals confidently across a wide range of automotive fluids.

## Overview

The National 4278 Differential Pinion Seal features a spring-loaded multi-lip design crafted from durable fluoroelastomer, delivering reliable sealing performance across a broad temperature range (-40°F to 400°F). Trusted for over 75 years, it offers exceptional compatibility with various automotive fluids, ensuring long-lasting protection for your vehicle’s differential.

## 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 |
|---------------|-------|
| ASIN | B000C5J0U4 |
| Brand Name | NATIONAL |
| Container Type | Bottle |
| Country of Origin | Mexico |
| Customer Reviews | 4.5 4.5 out of 5 stars (204) |
| Global Trade Identification Number | 00724956125289 |
| Included Components | Multi Purpose Seal |
| Item Form | Grease |
| Item Weight | 0.02 Pounds |
| Liquid Volume | 946 Milliliters |
| Manufacturer | Federal Mogul |
| 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 Degrees Fahrenheit |

## Product Details

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

## Images

![National 4278 Differential Pinion Seal - 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
- Valvoline FlexFill Full Synthetic SAE 75W-140 Gear Oil 1 QT Pouch

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

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-09-11*