---
product_id: 256334787
title: "Red Line 80301 Limited Slip Friction Modifier - 4 oz."
brand: "red line"
price: "28369 Ft"
currency: HUF
in_stock: false
reviews_count: 5
category: "Red Line"
url: https://www.desertcart.hu/products/256334787-red-line-80301-limited-slip-friction-modifier-4-oz
store_origin: HU
region: Hungary
---

# Improves mileage & reduces wear High viscosity-index for stable performance Compatible with synthetic & petroleum oils Red Line 80301 Limited Slip Friction Modifier - 4 oz.

**Brand:** red line
**Price:** 28369 Ft
**Availability:** ❌ Out of Stock

## Summary

> ⚙️ Unlock smooth power and silence the chatter — your differential’s new best friend!

## Quick Answers

- **What is this?** Red Line 80301 Limited Slip Friction Modifier - 4 oz. by red line
- **How much does it cost?** 28369 Ft with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/256334787-red-line-80301-limited-slip-friction-modifier-4-oz)

## Best For

- red line enthusiasts

## Why This Product

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

## Key Features

- • **Universal Compatibility:** Seamlessly works with both synthetic and petroleum gear oils for versatile use.
- • **Customizable Application:** Add 1oz increments to clutch-type limited slip units to eliminate chatter and enhance smoothness.
- • **Thermal Stability Mastery:** High viscosity-index formula maintains consistent film thickness across temperature extremes up to 400°F.
- • **Trusted Legacy Performance:** Since 1979, Red Line delivers uncompromising quality that professionals rely on for peak drivetrain performance.
- • **Precision Engineered Protection:** Maximize differential efficiency with advanced friction modifiers designed for longer drain intervals and less wear.

## Overview

Red Line 80301 Limited Slip Friction Modifier is a premium 4 oz. additive engineered to optimize limited-slip differentials by reducing chatter, improving mileage, and extending oil life. Its high viscosity-index formula ensures consistent performance across temperature variations and is compatible with both synthetic and petroleum gear oils. Trusted since 1979, it’s the go-to solution for professionals seeking superior drivetrain efficiency and protection.

## Description

Red Line differential friction modifier and break-in additives can be added to any gear oil to replace the limited-slip additives. They are ideal to tune a limited-slip unit.

Review: Good product, perfect for limited slip - Added to grand cherokee rear differential, worked as expected.
Review: Muy bueno - Este modificador de frucción me ha ido fantástico en el diferencial autoblocante trac lok de mi grand cherokee zj. Se han acabado los ruídos que tenía porque se enganchaban.los discos. Aunque tenía aceite 75W140 especial para autoblocante, no hacía bien su función. Saqué 110ml de aceite y lo sustituí por este botecito, y mano de santo. Si tienes ruídos o crujidos raros en el autoblocante, no dudes en ponerlo, serás feliz

## Features

- ENGINEERED - to provide the highest degree of protection and improvement of differential efficiency for better mileage, longer drain intervals, and less wear
- DIRECTION - Add 1oz at a time to clutch-type limited slip or posi-traction units to eliminate chatter
- HIGH VISCOSITY-INDEX - to provide relatively constant viscosity and film thickness with varying temperature change, exceed API GL-5 specifications
- COMPATIBLE WITH - both petroleum and synthetic gear oils
- WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000CPCBGE |
| Best Sellers Rank | #64,159 in Automotive ( See Top 100 in Automotive ) #267 in Oil & Fluid Additives |
| Brand | Red Line |
| Brand Name | Red Line |
| Container Type | Bottle |
| Customer Reviews | 4.7 out of 5 stars 282 Reviews |
| Global Trade Identification Number | 00083522803014 |
| Item Form | Oil |
| Liquid Volume | 4 Fluid Ounces |
| Liquid volume | 4 Fluid Ounces |
| Lower Temperature Rating | 10 Degrees Celsius |
| Manufacturer | Red Line |
| Material | Polytetrafluoroethylene (PTFE) |
| Package information | Bottle |
| Recommended Uses For Product | Automotive |
| Recommended uses for product | Automotive |
| Specific Uses For Product | Limited-Slip Differentials |
| UPC | 083522803014 |
| Unit Count | 4 Milliliters |
| Upper Temperature Rating | 400 Degrees Fahrenheit |
| Viscosity | High |

## Product Details

- **Material:** Synthetic
- **Brand:** Red Line
- **Package information:** Bottle
- **Liquid volume:** 4 Fluid Ounces
- **Recommended uses for product:** Automotive

## Images

![Red Line 80301 Limited Slip Friction Modifier - 4 oz. - Image 1](https://m.media-amazon.com/images/I/71auZeP6jKL.jpg)
![Red Line 80301 Limited Slip Friction Modifier - 4 oz. - Image 2](https://m.media-amazon.com/images/I/810gACQMFNL.jpg)
![Red Line 80301 Limited Slip Friction Modifier - 4 oz. - Image 3](https://m.media-amazon.com/images/I/81HDGfZdajL.jpg)
![Red Line 80301 Limited Slip Friction Modifier - 4 oz. - Image 4](https://m.media-amazon.com/images/I/81KJh4T38wL.jpg)
![Red Line 80301 Limited Slip Friction Modifier - 4 oz. - Image 5](https://m.media-amazon.com/images/I/81TPVqxAqeL.jpg)

## Questions & Answers

**Q: Would the 95 Isuzu 4x4 front differential benefit from this additive? I know the rear limited slip diff does!**
A: No, unless it's a limited slip after market and specifies such. On the rear positive,  too much would cause slippage between the plates.  Just ad enough to stop the clanging.  Too much would lesson the Limited slip .

**Q: Can this be used in redlline dct fluid that is used in a manual tranmission with lsd?**
A: It was purchased for my son.  I didn't use it.  My son is a car mechanic, so I think it is a good product.

**Q: Would this help a 95 Isuzu front 4x4 differential? ...that chatters around corners on pavement?**
A: Check your u-joints but if there ok. Let me know if it worked. Differential Gear oil is supposed to be replaced on a regular Preventative maintenance Schedule. I don’t know what the mileage is on your car is but it couldn’t hurt “unless your vehicle is not a LSD Diff.” Thanks!

**Q: do I need that for my 99 chevy express 1500 V8  with amsoil 80W90 together?**
A: My chevy Silverado 2500HD ran better after adding a 4oz. can of Redline with the rear gear oil. There is also an additive for the transfer case GM put in during a service. I would double check before putting that in the transfer case. Keep on reading, you'll find the answer. Good Luck

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good product, perfect for limited slip
*by K***E on 26 October 2024*

Added to grand cherokee rear differential, worked as expected.

### ⭐⭐⭐⭐⭐ Muy bueno
*by C***I on 1 October 2024*

Este modificador de frucción me ha ido fantástico en el diferencial autoblocante trac lok de mi grand cherokee zj. Se han acabado los ruídos que tenía porque se enganchaban.los discos. Aunque tenía aceite 75W140 especial para autoblocante, no hacía bien su función. Saqué 110ml de aceite y lo sustituí por este botecito, y mano de santo. Si tienes ruídos o crujidos raros en el autoblocante, no dudes en ponerlo, serás feliz

### ⭐⭐⭐⭐⭐ Worked a treat!
*by J***. on 13 July 2022*

I fitted a limited slip differential gearbox to my mini which creaked and moaned and groaned when turning slowly. Added half a bottle of this to the oil in the gearbox and the problem was gone instantly.

## Frequently Bought Together

- Red Line 80301 Limited Slip Friction Modifier - 4 oz.
- Sealey AK54 550ml Oil Suction Syringe, Multicoloured

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*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-02-04*