---
product_id: 19688723
title: "- Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart (2 Pack)"
brand: "red line"
price: "42784 Ft"
currency: HUF
in_stock: true
reviews_count: 8
category: "Red Line"
url: https://www.desertcart.hu/products/19688723-red-line-50304-mt-90-75w-90-gl-4-manual
store_origin: HU
region: Hungary
---

# Friction formula for quicker, smoother shifts 75W-90 viscosity for optimal gear protection GL-4 safe, protects brass synchros from damage - Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart (2 Pack)

**Brand:** red line
**Price:** 42784 Ft
**Availability:** ✅ In Stock

## Summary

> ⚙️ Shift Smooth, Drive Confident: The Ultimate Manual Transmission Upgrade

## Quick Answers

- **What is this?** - Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart (2 Pack) by red line
- **How much does it cost?** 42784 Ft with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/19688723-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

- • **Broad Compatibility:** Recommended for GL-1, GL-3, and GL-4 applications, fitting most manual transmissions seamlessly.
- • **Unmatched Gear Defense:** High-performance formula extends synchro and gear life under all driving conditions.
- • **Trusted Legacy Since 1979:** Red Line’s premium synthetic oil outperforms and outlasts competitors—no compromises.
- • **Safe on Sensitive Components:** Free from reactive sulfurs found in GL-5 oils, ensuring brass synchros stay damage-free.
- • **Effortless Shifting Every Time:** Perfect synchronizer friction coefficient eliminates notchy shifts—even in cold starts.

## Overview

Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission Lubricant is a premium synthetic oil designed to protect gears and extend synchro life. Its unique friction formula ensures smoother, quicker shifts even in cold conditions, while being safe for brass synchros by avoiding harmful reactive sulfurs. Trusted since 1979, this lubricant is compatible with GL-1, GL-3, and GL-4 gearboxes, making it a top choice for manual transmission enthusiasts seeking reliability and performance.

## Description

Buy Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart (2 Pack): Transmission Fluids - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Manual Transmission Lubricant Supreme - Redline lubricants are a premium synthetic oil product for your automobile needs. I utilize it in my classic Alfa Romeo Manual Transmission. Redline surpasses anything that was available when my Alfa was new. It really clings to the gears and shifts effortlessly with no grinding. This product works for most manual gear boxes but always verify with your owners manual. Larry Hunt
Review: Great oil !! - I bought a used 2007 Pontiac Vibe in 2021 with 140k miles, it always had a slight grind in the 5 speed transmission, when shifting into 3rd gear, the previous owner took good care of the car with all receipts of everything that had been done to the car, only problem was, when they changed the transmission oil they put GL-5 in it, I had read that others had the same problem, and after doing a lot of research on it, I thought what do II have to lose, after putting MT-90 75W-90 oil in it it stopped grinding almost instantly, smooth the shifts out in all gears and no more grinding in 3rd gear, I have to admit I was skeptical, that it would work, but it made a believer out of me !!! Redline makes a 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 | B00NT5V8RW |
| Best Sellers Rank | #14,583 in Automotive ( See Top 100 in Automotive ) #61 in Transmission Fluids |
| Brand | Red Line |
| Brand Name | Red Line |
| Container Type | Bottle |
| Customer Reviews | 4.9 out of 5 stars 597 Reviews |
| Item Form | Oil |
| Item Height | 12 inches |
| Item Weight | 2 Pounds |
| Liquid Volume | 64 Fluid Ounces |
| Manufacturer | Red Line |
| Material | Oil |
| Package Information | Bottle |
| Recommended Uses For Product | Gear Oil |
| UPC | 737534816592 |
| Unit Count | 64 Fluid Ounces |
| Viscosity | 75W90 |

## Product Details

- **Material:** Oil
- **Brand:** Red Line
- **Package Information:** Bottle
- **Liquid Volume:** 64 Fluid Ounces
- **Item Weight:** 2 Pounds

## Images

![- Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart (2 Pack) - Image 1](https://m.media-amazon.com/images/I/719nvofbSzL.jpg)

## Questions & Answers

**Q: Is anyone running this in an NV4500 long term? How does it hold up?**
A: I've been running it for 35,000 miles in my 1996 model GM NV4500 without issue.

**Q: Do I pour the entire contents directly in?  Are there any special instructions?**
A: To get maximum benefit of the Red Line you need to replace all the oil in the transmission.  For my car, it took 3.4 quarts so I bought four and filled it up until fluid was level with the bottom of the fill plug.  If you go to the Red Line website, they have which transmission oil is correct for your car and the capacity of the transmission so you will know how much you will need.

**Q: Is this product non-synthetic gl-3?**
A: Synthetic gl -4 oil

**Q: Can i use on 1992 chevy camaro rs?**
A: I would not. It is supposed to be OEM recommended for my 98 vw Cabrio 5speed. So Put $46 worth in and at0°F I could not shift the car until 30 minutes of idling. second Synchromesh was very fussy at 20deg

## Customer Reviews

### ⭐⭐⭐⭐⭐ Manual Transmission Lubricant Supreme
*by L***T on July 2, 2025*

Redline lubricants are a premium synthetic oil product for your automobile needs. I utilize it in my classic Alfa Romeo Manual Transmission. Redline surpasses anything that was available when my Alfa was new. It really clings to the gears and shifts effortlessly with no grinding. This product works for most manual gear boxes but always verify with your owners manual. Larry Hunt

### ⭐⭐⭐⭐⭐ Great oil !!
*by J***. on October 13, 2024*

I bought a used 2007 Pontiac Vibe in 2021 with 140k miles, it always had a slight grind in the 5 speed transmission, when shifting into 3rd gear, the previous owner took good care of the car with all receipts of everything that had been done to the car, only problem was, when they changed the transmission oil they put GL-5 in it, I had read that others had the same problem, and after doing a lot of research on it, I thought what do II have to lose, after putting MT-90 75W-90 oil in it it stopped grinding almost instantly, smooth the shifts out in all gears and no more grinding in 3rd gear, I have to admit I was skeptical, that it would work, but it made a believer out of me !!! Redline makes a good product !!

### ⭐⭐⭐⭐⭐ The best GL4 gear oil out there!!!
*by S***T on January 29, 2024*

I have been using Redline MT90 in my transfer case for around 50k miles now. This case requires GL4 gear oil and the MT90 provides the best shifting and smoothness. I use this in a weekend offroad vehicle so it sees some abuse and I have had zero issues running the gear oil. One of the only true GL4 oil left that I have found. Most others are GL4/5 which doesnt work great with copper synchros.

## Frequently Bought Together

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

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*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-03-01*