---
product_id: 7823976
title: "Red Line 50104 75W85 GL-5 Full Synthetic Gear Oil for Hypoid Limited Slip Differentials - 1 Quart"
brand: "red line"
price: "€ 37.24"
currency: EUR
in_stock: true
reviews_count: 13
category: "Red Line"
url: https://www.desertcart.ie/products/7823976-red-line-50104-75w85-gl-5-full-synthetic-gear-oil
store_origin: IE
region: Ireland
---

# Full synthetic formula for high-temp stability 75W85 viscosity for optimal gear protection GL-5 rating ensures extreme pressure durability Red Line 50104 75W85 GL-5 Full Synthetic Gear Oil for Hypoid Limited Slip Differentials - 1 Quart

**Brand:** red line
**Price:** € 37.24
**Availability:** ✅ In Stock

## Summary

> ⚙️ Shift to the future of gear oil—where performance meets precision.

## Quick Answers

- **What is this?** Red Line 50104 75W85 GL-5 Full Synthetic Gear Oil for Hypoid Limited Slip Differentials - 1 Quart by red line
- **How much does it cost?** € 37.24 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/7823976-red-line-50104-75w85-gl-5-full-synthetic-gear-oil)

## 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

- • **Enhanced Driving Dynamics:** Experience quieter differentials, smoother acceleration, and potential MPG improvements with every drive.
- • **Precision Viscosity Control:** Engineered SAE 75W85 viscosity delivers seamless gear engagement and superior protection under extreme conditions.
- • **Broad Application Versatility:** Perfect for hypoid differentials, final drives, transfer cases, and more—covering a wide range of late-model vehicles.
- • **Proven High-Performance Legacy:** Trusted by top automotive brands and Formula racing teams since 1979 for unmatched reliability and power.
- • **Ultimate Limited Slip Compatibility:** Formulated with advanced friction modifiers tailored for clutch-type limited slip differentials—no extra additives needed.

## Overview

Red Line 50104 is a full synthetic 75W85 GL-5 gear oil designed specifically for hypoid limited slip differentials. It features advanced friction modifiers for clutch-type LSDs, ensuring smooth operation without additional additives. Trusted by premium automotive brands and racing teams, this oil offers superior thermal stability, extreme pressure protection, and enhanced driving performance in a versatile 1-quart bottle.

## Description

Buy Red Line 50104 75W85 GL-5 Full Synthetic Gear Oil for Hypoid Limited Slip Differentials - 1 Quart: Gear Oils - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Great price and good quality - Works great Toyota Tacoma 2018
Review: Red Line compared to Original gear oil during Servicing - I changed the rear differential fluid in my 2021 Kia Seltos Turbo at 50 K miles. The original oil was clear. Checked and clean the magnet. Small amount of powered filings on magnet, normal condition. Replaced with Redline75W85 GL-5 Full Synthetic Gear Oil. The original fluid had a fish smell to it, possibly regular gear oil. The Redline nearly no smell and the oil felt more slippery on my hand. After fluid install, I drove the car in traffic and the interstate. I felt like I had a little more power and easier acceleration from a Stop. I can tell the rear end is quieter as well. Next I will replace the transmission fluid. Being a dual clutch the Redline MT fluid will hopefully complement the performance increase. It should increase MPG a little. Very Good lubricant.

## Features

- SATISFIES REQUIREMENTS - for gear oil viscosity of SAE 75W80, 75W, 80W and 85W, as well as SAE 30 and SAE 10W30 motor oil
- APPLICATIONS - include differential oil, final drive oil, gear oil and transfer case fluid, this product is not designed for use in most manual transmissions or transaxles with synchronizers, as extreme slipperiness may cause shifting problems
- CONTAINS - additional friction modifiers for suitability with clutch-type limited slip differentials - for most LSDs, no additional friction modifiers are required, known formerly as LightWeight Gear Oil
- POPULAR GEAR OIL FOR - in many late model BMW, Dodge, Ford, GM, Jeep, Lexus, Mercedes-Benz, Ram, Toyota, also popular in many Formula racing transaxles, including Hewland LD-200 and FTR sequential
- WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000J3G8KE |
| Best Sellers Rank | #1,279 in Automotive ( See Top 100 in Automotive ) #2 in Gear Oils |
| Brand | Red Line |
| Date First Available | September 27, 2006 |
| Global Trade Identification Number | 00083522501040 |
| Is Discontinued By Manufacturer | No |
| Item Form | Oil |
| Item Weight | 2 pounds |
| Item model number | RED50104 |
| Liquid Volume | 32 Fluid Ounces |
| Manufacturer | Red Line |
| Material | Synthetic |
| Number of Items | 1 |
| Package Information | Bottle |
| Product Dimensions | 4 x 4 x 4 inches |
| Recommended Uses For Product | Vehicle |
| Specific Uses For Product | Vehicle |
| UPC | 083522501040 |
| Unit Count | 32.0 Fluid Ounces |
| Viscosity | 75W85 |

## Product Details

- **Brand:** Red Line
- **Item Weight:** 2 Pounds
- **Liquid Volume:** 32 Fluid Ounces
- **Material:** Synthetic
- **Package Information:** Bottle

## Images

![Red Line 50104 75W85 GL-5 Full Synthetic Gear Oil for Hypoid Limited Slip Differentials - 1 Quart - Image 1](https://m.media-amazon.com/images/I/71XbhvbssUL.jpg)
![Red Line 50104 75W85 GL-5 Full Synthetic Gear Oil for Hypoid Limited Slip Differentials - 1 Quart - Image 2](https://m.media-amazon.com/images/I/71VAiArQ7ZL.jpg)
![Red Line 50104 75W85 GL-5 Full Synthetic Gear Oil for Hypoid Limited Slip Differentials - 1 Quart - Image 3](https://m.media-amazon.com/images/I/81vtk9-uy5L.jpg)
![Red Line 50104 75W85 GL-5 Full Synthetic Gear Oil for Hypoid Limited Slip Differentials - 1 Quart - Image 4](https://m.media-amazon.com/images/I/81owXIUH2ML.jpg)
![Red Line 50104 75W85 GL-5 Full Synthetic Gear Oil for Hypoid Limited Slip Differentials - 1 Quart - Image 5](https://m.media-amazon.com/images/I/81KjZG0DzKL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Questions & Answers

**Q: Will it work for a 2007 Tundra 2wd rear dif?**
A: I tried this is my 2007 Tacoma Prerunner with the mechanical limited slip diff and the clutches just wouldn't properly slip no matter how much friction modifier I added.

I ended up throwing out some good money worth of oil and put cheap Castrol LSD gear oil in it and it worked fine.

I don't think this is a bad product, Toyota differentials just do not like synthetic oil in some cases.

**Q: Will this work for toyota rav4 awd 2016?**
A: Refer to your owners manual. IF the application (transmission/transfer case) states lubricant per GL5 then yes, it will work great. If GL4 then look at Red Line ATF. NOTE: API GL classifications do not go up and down like motor oils (API SN may be used in SL spec engine). GL5 is totally different from GL4 and will damage synchronizer surfaces and or limited slip clutches if not applied correctly.

**Q: Will this viscosity provide adequate protection for a 1971 C10 daily driver?**
A: I noticed a difference when I changed mine out to this. I just used their mt90 for my manual transmission and it made a huge difference

**Q: Lexus gs 350awd says 1.4qt 75w85 for rear and .7qt 80w90 for front diff. can i use this for both? have a bit of 80w90, can just buy 2 bottles.**
A: I would recommend staying with the fluid recommended by Lexus.  If it were me, I would buy one of each fluid required.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great price and good quality
*by S***S on January 5, 2026*

Works great Toyota Tacoma 2018

### ⭐⭐⭐⭐⭐ Red Line compared to Original gear oil during Servicing
*by R***R on October 27, 2025*

I changed the rear differential fluid in my 2021 Kia Seltos Turbo at 50 K miles. The original oil was clear. Checked and clean the magnet. Small amount of powered filings on magnet, normal condition. Replaced with Redline75W85 GL-5 Full Synthetic Gear Oil. The original fluid had a fish smell to it, possibly regular gear oil. The Redline nearly no smell and the oil felt more slippery on my hand. After fluid install, I drove the car in traffic and the interstate. I felt like I had a little more power and easier acceleration from a Stop. I can tell the rear end is quieter as well. Next I will replace the transmission fluid. Being a dual clutch the Redline MT fluid will hopefully complement the performance increase. It should increase MPG a little. Very Good lubricant.

### ⭐⭐⭐⭐⭐ Great Quality
*by W***E on January 15, 2026*

I purchased this to replace the rear differential fluid on my 2020 explorer and there’s definitely a noticeable difference in the performance. I will be using this again!

## Frequently Bought Together

- Red Line 50104 75W85 GL-5 Full Synthetic Gear Oil for Hypoid Limited Slip Differentials - 1 Quart
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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-14*