---
product_id: 615253453
title: "Red Line (50304) MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant - 1 Quart (Pack of 3)"
brand: "red line"
price: "VT34360"
currency: VUV
in_stock: true
reviews_count: 13
category: "Red Line"
url: https://www.desertcart.vu/products/615253453-red-line-50304-mt-90-75w-90-gl-4-manual
store_origin: VU
region: Vanuatu
---

# Faster, smoother shifts even in cold temps 75W-90 viscosity for optimal gear protection GL-4 safe, protects brass synchros without damage Red Line (50304) MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant - 1 Quart (Pack of 3)

**Brand:** red line
**Price:** VT34360
**Availability:** ✅ In Stock

## Summary

> ⚙️ Shift into the fast lane with flawless precision!

## Quick Answers

- **What is this?** Red Line (50304) MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant - 1 Quart (Pack of 3) by red line
- **How much does it cost?** VT34360 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/615253453-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

- • **Trusted Legacy:** Red Line’s proven formula since 1979 ensures uncompromised quality
- • **Triple Pack Value:** Three quarts of premium lubricant to keep your transmission running flawlessly
- • **Cold-Weather Ready:** Maintains perfect friction coefficient even at low temperatures
- • **Precision Gear Protection:** Extends synchro life with high-performance GL-4 formula
- • **Seamless Shifting Experience:** Eliminates notchy shifts for smooth gear changes every time

## Overview

Red Line MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant is a high-performance gear oil designed to protect and extend the life of your transmission’s synchros. Its unique 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 meets GL-1, GL-3, and GL-4 specifications and comes in a convenient 3-quart pack for lasting maintenance.

## Description

Buy Red Line (50304) MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant - 1 Quart (Pack of 3): Gear Oils - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Worth the price. - Get what you pay for, though pricey, irrefutable 'performance' gains: vehicle shifts much much much more smoothly now - no more 'crunchy' shifts, & all gears operate better in a wider range of temps as well. Prior to the fluid change, 1st & Reverse were the more difficult gears to get in to, especially in colder weather - before the fluid had a chance to warm up - now they all shift smooth as butter. I can also shift much faster as a result. Last little + is that the fluid doesn't smell horrid.
Review: Miracle Juice! - I put this in a 2002 Chevy Tracker (rebadged Suzuki Vitara) with a 5 speed stick transmission and lever operated transfer case. The factory specification calls for a 75w90 GL4 gear lube in both but a previous owner had put GL5 rear end gear lube in them. GL5 eats at the "yellow metal" brass/bronze used in the gear synchronizers in the transmission and transfer case. As a result of this the transfer case would not shift into low range and the 5 speed stick was very tricky to shift. Hard shifts, having to force it into gear, being stiffer when it was cold, just overall not smooth. I was worried because a friend with a Jeep had a similar occurrence and ended up replacing his whole transmission because it became unshiftable and wouldn't hold gears. Read a review of this Redline and it's specific use for manual transmissions. Figured it couldn't hurt and put it in the transmission and transfer case. IMMEDIATELY it was smoother to shift just sitting in the garage with the engine off. I backed out of the garage and was able to promptly push it into 4lo for the first time since I have owned it. Worked great and I backed right up a small hill without any trouble. Several weeks later it's shifting better and low range is back. I will say the transmission was obviously damaged and the transfer case is still not smooth going into low range but I CAN go into low range now and the transmission is definitely smoother. I can only imagine what this stuff would be like in a transmission in better shape than mine. It's not cheap but considering how hard it is to find GL4 rated 75w90 anymore (I bet your local parts store doesn't have it or has a few quarts at most) I'd highly recommend this Redline product.

## Features

- The information below is per-pack only
- 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 | B0CXPXWGY5 |
| Best Sellers Rank | #1,892 in Automotive ( See Top 100 in Automotive ) #5 in Gear Oils |
| Brand Name | Red Line |
| Container Type | Flasche |
| Customer Reviews | 4.9 4.9 out of 5 stars (4,979) |
| Item Form | Fluids,Oil |
| Item Type Name | ACCESSORIES |
| Item Weight | 5.1 Pounds |
| Liquid Volume | 96 Fluid Ounces |
| Manufacturer | Yukon Gear & Axle |
| Model Number | 50304 |
| Number of Items | 3 |
| Part Number | 50304 |
| Recommended Uses For Product | Lubricant,Lube |
| SAE J300 Viscosity Grade | 75W-90 |
| Unit Count | 95.9642 Fluid Ounces |
| Upper Temperature Rating | 300 Degrees Fahrenheit |
| Viscosity | 75W90 |

## Product Details

- **Brand:** Red Line
- **Item Weight:** 5.1 Pounds
- **Liquid Volume:** 96 Fluid Ounces
- **Package Information:** Flasche
- **Recommended Uses For Product:** Lubricant,Lube

## Images

![Red Line (50304) MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant - 1 Quart (Pack of 3) - Image 1](https://m.media-amazon.com/images/I/71HtWob7W1L.jpg)

## Available Options

This product comes in different **Size, Number Of Items** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Worth the price.
*by Z***. on February 5, 2026*

Get what you pay for, though pricey, irrefutable 'performance' gains: vehicle shifts much much much more smoothly now - no more 'crunchy' shifts, & all gears operate better in a wider range of temps as well. Prior to the fluid change, 1st & Reverse were the more difficult gears to get in to, especially in colder weather - before the fluid had a chance to warm up - now they all shift smooth as butter. I can also shift much faster as a result. Last little + is that the fluid doesn't smell horrid.

### ⭐⭐⭐⭐⭐ Miracle Juice!
*by A***M on February 8, 2012*

I put this in a 2002 Chevy Tracker (rebadged Suzuki Vitara) with a 5 speed stick transmission and lever operated transfer case. The factory specification calls for a 75w90 GL4 gear lube in both but a previous owner had put GL5 rear end gear lube in them. GL5 eats at the "yellow metal" brass/bronze used in the gear synchronizers in the transmission and transfer case. As a result of this the transfer case would not shift into low range and the 5 speed stick was very tricky to shift. Hard shifts, having to force it into gear, being stiffer when it was cold, just overall not smooth. I was worried because a friend with a Jeep had a similar occurrence and ended up replacing his whole transmission because it became unshiftable and wouldn't hold gears. Read a review of this Redline and it's specific use for manual transmissions. Figured it couldn't hurt and put it in the transmission and transfer case. IMMEDIATELY it was smoother to shift just sitting in the garage with the engine off. I backed out of the garage and was able to promptly push it into 4lo for the first time since I have owned it. Worked great and I backed right up a small hill without any trouble. Several weeks later it's shifting better and low range is back. I will say the transmission was obviously damaged and the transfer case is still not smooth going into low range but I CAN go into low range now and the transmission is definitely smoother. I can only imagine what this stuff would be like in a transmission in better shape than mine. It's not cheap but considering how hard it is to find GL4 rated 75w90 anymore (I bet your local parts store doesn't have it or has a few quarts at most) I'd highly recommend this Redline product.

### ⭐⭐⭐⭐⭐ Nice product
*by R***S on March 9, 2026*

Not much to say it is what it is cheaper than local auto parts store got here quickly

## Frequently Bought Together

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-05-03*