---
product_id: 615253453
title: "Red Line 50306 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 5 Gallon"
brand: "red line"
price: "4531.68 DT"
currency: TND
in_stock: true
reviews_count: 13
category: "Red Line"
url: https://www.desertcart.tn/products/615253453-red-line-50306-mt-90-75w-90-gl-4-manual
store_origin: TN
region: Tunisia
---

# Reduces shift effort & eliminates notchy shifting 75W-90 viscosity for optimal gear protection Safe for brass synchros, extends transmission life Red Line 50306 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 5 Gallon

**Brand:** red line
**Price:** 4531.68 DT
**Availability:** ✅ In Stock

## Summary

> ⚙️ Shift smoother, drive smarter — the ultimate manual transmission upgrade!

## Quick Answers

- **What is this?** Red Line 50306 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 5 Gallon by red line
- **How much does it cost?** 4531.68 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/615253453-red-line-50306-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

- • **Built for Longevity:** Protect your transmission with high-performance synthetic oil that extends synchro and gear life.
- • **Trusted by Enthusiasts:** Used by racers and daily drivers alike, proven in high-stress and long-distance conditions.
- • **Bulk Supply, Bulk Value:** 5-gallon drum ensures you’re stocked for multiple maintenance cycles, saving time and money.
- • **Versatile Compatibility:** Ideal for GL-1, GL-3, GL-4 applications and safe on brass synchros—no corrosive sulfurs here.
- • **Smooth Shifts, Every Time:** Experience buttery-smooth gear changes even in cold starts with perfect synchronizer friction.

## Overview

Red Line 50306 MT-90 is a premium synthetic 75W-90 GL-4 manual transmission and transaxle lubricant designed to deliver smoother shifts, protect gears and synchros, and extend transmission life. Trusted by automotive enthusiasts and professionals, it’s compatible with GL-1, GL-3, and GL-4 applications and safe for brass synchros, making it the go-to choice for high-performance and daily-driven manual vehicles. Available in a convenient 5-gallon drum for long-term use.

## Description

Buy Red Line 50306 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 5 Gallon: Gear Oils - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Feel good - I used this stuff to replace the old gear oil for my DC2 Integra ITR. No issues as if now. Shifts pretty good.
Review: The only manual transmission oil I will ever buy anymore - I have used this in three different vehicles over the years. First was a heavily modified and tuned 2008 Cobalt SS turbo with the F35 trans. I tracked that car often, including high speed courses, autocross, and the drag strip. The fluid held up fantastically, and always shifted smooth and accurately. I also used the SSlowbalt for my commute at the time, which was 120 miles a day @80-85mph. I have since (sadly) sold my SSlowbalt, and mostly drive my wife's previous (now mine) car, a moderately modified and tuned 2012 Cruze Eco with the M32 trans, that we bought brand new. I have used MT90 in that since the first trans fluid change at ~50k (150k miles at the time of writing this, was changed with the same fluid at 100k, and about to do a third change next week.) This stuff shifts SO SMOOTH! I wasn't having issues in my Cruze before I swapped the fluid, but I did, and still notice, how much nicer the shifting feels compared to my buddy's 2012 Cruze ECO 6MT. This is 100% worth it. I have driven our Cruze to both US coasts, through 39 states, ontario, and numerous drives back home to Detroit from Lincoln, NE. I also use my Cruze for the occasional autocross event. Just all around smooth and quiet operation. I also have this same fluid in my 1999 Jeep Wrangler TJ with 213k at the time of writing this. The MT90 smoothed it out to the point where I was worried, because I was so used to that old AX15 shifting like a dump truck, or something haha. But not anymore! Totally smooth, no grinding on faster shifts (1-2 used to grind a bit if I didn't remember I was driving a brick and tried to shift it too fast). Now it doesn't matter if I accidentally shift a bit too quickly, because there's absolutely no grind at all anymore! My TJ isn't a pavement princess. I use it for what it was made to do, and I use it a lot. That trans gets a regular workout. It has been about 15k miles since I swapped it. TL;DR: If you like your manual transmission to shift like butter, quiet, and precise, buy this fluid.

## 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 | B0084DZ15O |
| Best Sellers Rank | #2,226 in Automotive ( See Top 100 in Automotive ) #6 in Gear Oils |
| Brand | Red Line |
| Brand Name | Red Line |
| Container Type | Drum |
| Customer Reviews | 4.9 out of 5 stars 5,063 Reviews |
| Global Trade Identification Number | 00083522503068 |
| Item Form | Oil |
| Item Weight | 36 pounds |
| Liquid Volume | 5 gallons |
| Manufacturer | Red Line |
| Material | Synthetic |
| Model Number | 50306 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Package Information | Drum |
| Part Number | 50306 |
| Recommended Uses For Product | Automotive, Mechanical |
| SAE J300 Viscosity Grade | 75W-90 |
| Specific Uses For Product | Manual transmissions and transaxles, GL-1, GL-3, and GL-4 applications, various vehicle brands, Atlas transfer cases for Off-Road, brass synchros, cold climates |
| UPC | 083522503068 |
| Unit Count | 640 Fluid Ounces |

## Product Details

- **Brand:** Red Line
- **Item Weight:** 5.1 pounds
- **Liquid Volume:** 96 fluid ounces
- **Material:** Brass
- **Package Information:** Bottle

## Images

![Red Line 50306 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 5 Gallon - Image 1](https://m.media-amazon.com/images/I/61TM8UXZCZL.jpg)
![Red Line 50306 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 5 Gallon - Image 2](https://m.media-amazon.com/images/I/81zyln3z-IL.jpg)
![Red Line 50306 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 5 Gallon - Image 3](https://m.media-amazon.com/images/I/81eZ7tyT1BL.jpg)
![Red Line 50306 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 5 Gallon - Image 4](https://m.media-amazon.com/images/I/81uhE-eyqXL.jpg)
![Red Line 50306 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 5 Gallon - Image 5](https://m.media-amazon.com/images/I/81M9Tv+BFuL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Feel good
*by B***1 on June 28, 2026*

I used this stuff to replace the old gear oil for my DC2 Integra ITR. No issues as if now. Shifts pretty good.

### ⭐⭐⭐⭐⭐ The only manual transmission oil I will ever buy anymore
*by T***Y on July 10, 2021*

I have used this in three different vehicles over the years. First was a heavily modified and tuned 2008 Cobalt SS turbo with the F35 trans. I tracked that car often, including high speed courses, autocross, and the drag strip. The fluid held up fantastically, and always shifted smooth and accurately. I also used the SSlowbalt for my commute at the time, which was 120 miles a day @80-85mph. I have since (sadly) sold my SSlowbalt, and mostly drive my wife's previous (now mine) car, a moderately modified and tuned 2012 Cruze Eco with the M32 trans, that we bought brand new. I have used MT90 in that since the first trans fluid change at ~50k (150k miles at the time of writing this, was changed with the same fluid at 100k, and about to do a third change next week.) This stuff shifts SO SMOOTH! I wasn't having issues in my Cruze before I swapped the fluid, but I did, and still notice, how much nicer the shifting feels compared to my buddy's 2012 Cruze ECO 6MT. This is 100% worth it. I have driven our Cruze to both US coasts, through 39 states, ontario, and numerous drives back home to Detroit from Lincoln, NE. I also use my Cruze for the occasional autocross event. Just all around smooth and quiet operation. I also have this same fluid in my 1999 Jeep Wrangler TJ with 213k at the time of writing this. The MT90 smoothed it out to the point where I was worried, because I was so used to that old AX15 shifting like a dump truck, or something haha. But not anymore! Totally smooth, no grinding on faster shifts (1-2 used to grind a bit if I didn't remember I was driving a brick and tried to shift it too fast). Now it doesn't matter if I accidentally shift a bit too quickly, because there's absolutely no grind at all anymore! My TJ isn't a pavement princess. I use it for what it was made to do, and I use it a lot. That trans gets a regular workout. It has been about 15k miles since I swapped it. TL;DR: If you like your manual transmission to shift like butter, quiet, and precise, buy this fluid.

### ⭐⭐⭐⭐⭐ Scion grinding in 2nd or 3rd? This is what you need!
*by A***N on June 26, 2026*

Wow, I am shocked! So I've been dealing with my gears grinding in 2nd and 3rd for the past 1 1/2 Years in my manual 2005 Scion XA the car has had the problem since before i bought it, The previous owners replaced the clutch, And I'm assuming that someone had added extra gear oil, Because it spilled out when i took off the fill cap on ramps, I've been trying to figure out the grinding, For the past 2 years doing everything but trying to put a new clutch in, Previous owners also stated that the mechanic may have put the clutch in wrong, I guess he didn't, Because this nearly completely fixed the issue in under 200 miles of driving, Driving has also become much smoother, If you have a Scion XA i suggest changing to this oil regardless if your gears are grinding! You only need exactly 2 quarts for the Scion XA no more no less, I wish all m mechanics would look this up before adding too much oil! I found this out from reading forms on the Scion XA, Everyone suggested this oil for the grinding and regardless! So i hope someone sees it here!

## Frequently Bought Together

- Red Line (50304) MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant - 1 Quart (Pack of 3)
- Slippery Pete 5cc Hand Pump Transfers Gear Oil, Transmission and Differential Fluids From Quart Bottles (Not for Red Line Quarts) (1)
- Rexka 12pcs Transfer & Differential Service Gasket Kit Compatible with Toyota Lexus 4Runner Land Cruiser Tundra Tacoma FJ Cruiser Highlander RAV4 Sequoia Sienna 1215710010 9043024003 90430A0003

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-08-14*