---
product_id: 592333607
title: "Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart (4 Pack)"
brand: "red line"
price: "€ 240.57"
currency: EUR
in_stock: true
reviews_count: 8
category: "Red Line"
url: https://www.desertcart.fi/products/592333607-red-line-50304-mt-90-75w-90-gl-4-manual
store_origin: FI
region: Finland
---

# Friction formula enables quicker, smoother shifts 75W-90 viscosity for optimal gear protection GL-4 safe, protects brass synchros from corrosion Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart (4 Pack)

**Brand:** red line
**Price:** € 240.57
**Availability:** ✅ In Stock

## Summary

> ⚙️ Shift into the fast lane of flawless performance!

## Quick Answers

- **What is this?** Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart (4 Pack) by red line
- **How much does it cost?** € 240.57 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/592333607-red-line-50304-mt-90-75w-90-gl-4-manual)

## 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

- • **Bulk Value Pack:** Four 1-quart bottles to keep your ride smooth and protected—because downtime isn’t an option.
- • **Synchro-Friendly Formula:** GL-4 rated and free from reactive sulfurs, ensuring longer synchro life and brass safety.
- • **Precision Gear Protection:** Advanced 75W-90 viscosity guards your transmission under all conditions.
- • **Trusted Legacy Performance:** Since 1979, Red Line delivers uncompromising quality for professional-grade reliability.
- • **Seamless Shifting Experience:** Engineered friction coefficient eliminates notchy shifts—even in cold starts.

## Overview

Red Line 50304 MT-90 is a premium 75W-90 GL-4 manual transmission lubricant designed to enhance gear protection and extend synchro life. Its unique friction formula ensures quicker, smoother shifts even in cold conditions, while being safe for brass synchros by excluding damaging reactive sulfurs. Packaged in a convenient 4-quart set, it’s the trusted choice since 1979 for professional-grade transmission care.

## Description

Buy Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart (4 Pack): Gear Oils - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Oil change 2915 Smart Car Trans - EXACTLY EHST OEM 2015 SMART CAR REQUIRES FOR TRANSMISSION OIL CHANGE. Works as it should. Highly Recommended. My transmission shifts much better. It took 3 quarts.
Review: Gear oil - As advertised. Transmission shifts much smother. Good product.

## Features

- HIGH PERFORMANCE - gear protection and longer synchro life. Recommended for GL-1, GL-3, and GL-4 applications.
- QUICKER SHIFTS - perfect synchronizer coefficient of friction and eliminates notchy shifting, even when cold
- REQUIREMENTS - gear oil viscosity of 75W; 80W; SAE 40 10W40 and 15W40 motor oil
- POPULAR GEAR OIL FOR - GL-1, GL-3 and GL-4 applications, as well as where most special synchromesh fluids are specified. Safe for brass synchros, as it lacks the reactive sulfurs found in most GL-5 oils that cause damage
- WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000QFN326 |
| Best Sellers Rank | #185,765 in Automotive ( See Top 100 in Automotive ) #178 in Gear Oils |
| Brand | Red Line |
| Customer Reviews | 4.7 4.7 out of 5 stars (56) |
| Date First Available | April 2, 2020 |
| Item Form | Oil |
| Item Weight | 2 pounds |
| Item model number | 50304 |
| Liquid Volume | 128 Fluid Ounces |
| Manufacturer | Red Line |
| Manufacturer Part Number | 50304 |
| Material | Oil |
| Model | (1063017) MT-90 75W90 GL-4 - QUART |
| Number of Items | 4 |
| Package Information | Bottle |
| Product Dimensions | 4 x 4 x 9 inches |
| Recommended Uses For Product | Automotive |
| Specific Uses For Product | Prevent Corrosion |
| Unit Count | 128.0 Fluid Ounces |
| Viscosity | 75W-90 |

## Product Details

- **Brand:** Red Line
- **Item Weight:** 2 Pounds
- **Liquid Volume:** 128 Fluid Ounces
- **Material:** Oil
- **Package Information:** Bottle

## Images

![Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart (4 Pack) - Image 1](https://m.media-amazon.com/images/I/51zz0TuOOUL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Oil change 2915 Smart Car Trans
*by C***. on December 30, 2025*

EXACTLY EHST OEM 2015 SMART CAR REQUIRES FOR TRANSMISSION OIL CHANGE. Works as it should. Highly Recommended. My transmission shifts much better. It took 3 quarts.

### ⭐⭐⭐⭐⭐ Gear oil
*by R***D on July 2, 2024*

As advertised. Transmission shifts much smother. Good product.

### ⭐⭐⭐⭐⭐ Best money can buy
*by T***L on April 29, 2024*

Best oil for Japan trans money can buy.

## Frequently Bought Together

- Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart (4 Pack)
- Slippery Pete - Fluid Pump for Standard Quart Bottles - 8cc per Pump Stroke and 3rd Hand Adapter, Transfer Gear Oil, Transmission and Differential Fluid (28mm)
- Red Line 57904 75W90 GL-5 Synthetic Gear Oil for Hypoid Limited Slip Differentials - 1 Quart (2 Pack)

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**Shop now:** [https://www.desertcart.fi/products/592333607-red-line-50304-mt-90-75w-90-gl-4-manual](https://www.desertcart.fi/products/592333607-red-line-50304-mt-90-75w-90-gl-4-manual)

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-03-11*