--- product_id: 343633702 title: "Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart (2 Pack)" brand: "red line" price: "849.55 DT" currency: TND in_stock: true reviews_count: 5 category: "Red Line" url: https://www.desertcart.tn/products/343633702-red-line-50304-mt-90-75w-90-gl-4-manual store_origin: TN region: Tunisia --- # Withstands up to 300°F Optimized for manual transmissions 75W-90 GL-4 viscosity Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart (2 Pack) **Brand:** red line **Price:** 849.55 DT **Availability:** ✅ In Stock ## Summary > ⚙️ Shift Smooth, Drive Confident: The Gear Oil Millennials Trust ## 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?** 849.55 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/343633702-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 by Enthusiasts:** Highly rated by users for fixing grinding issues and enhancing transmission longevity. - • **Ultimate Gear Protection:** Advanced formula guards gears and synchronizers against wear and corrosion. - • **Effortless Shifting, Every Time:** Perfect synchronizer friction for smooth gear changes, even when cold. - • **Engineered for High Performance:** Formulated to eliminate gear whine and rattle at elevated temperatures up to 300°F. - • **Tailored for Manual Transmissions:** Specifically designed for GL-1, GL-3, and GL-4 manual transmissions and transaxles. ## Overview Red Line 50304 MT-90 is a premium 75W-90 GL-4 manual transmission lubricant designed to provide superior gear protection and smooth shifting. It features a perfect coefficient of friction for synchronizers, eliminates gear noise at high temperatures up to 300°F, and is trusted by automotive enthusiasts to fix grinding and improve transmission performance in manual vehicles. ## Description Red Line MT-90 Manual Transmission Lubricant A 75W90 GL-4 gear oil (SAE 10W/15W/40 engine oil viscosity) designed for use in manual transmissions and transaxles. Red Line MT-90 Manual Transmission Lubricant provides excellent protection of gears and synchronizers and its balanced slipperiness provides a perfect coefficient of friction, allowing easier shifting. Red Line MTL / MT-90 BENEFIT SUMMARY * Eliminates notchy shifting * Designed for manual transmissions and transaxles * Perfect synchronizer coefficient of friction * Enables high-speed downshifting * Excellent shifting even when cold * Eliminates gear whine and rattle at high temperatures * High-performance gear protection * Non-corrosive toward synchronizers * Satisfies manual transmissions and transaxles requiring motor oils or GL-1, GL-3, or GL-4 gear oils. Review: Liquid gold for Toyotas - If you own an old Toyota, use redline in your transmission, it's really that simple. Better, smoother, and longer lasting than anything on the market Review: Scion grinding in 2nd or 3rd? This is what you need! - 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! ## Features - manufacturer: Red Line Oil - Item Trademark: RED LINE OIL - Item Weight: pounds, pounds, 1.99, 1.99 - Item Category: Machine Lubricant ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00NT5V8RW | | Best Sellers Rank | #60,213 in Automotive ( See Top 100 in Automotive ) #689 in Automotive Oils | | Brand | Red Line | | Brand Name | Red Line | | Container Type | Bottle | | Customer Reviews | 4.9 out of 5 stars 580 Reviews | | Item Form | Oil | | Item Weight | 1.99 Pounds | | Item weight | 1.99 Pounds | | Liquid Volume | 64 Fluid Ounces | | Liquid volume | 64 Fluid Ounces | | Manufacturer | Red Line | | Model Number | 50304 | | Number of Items | 1 | | Package information | Bottle | | Part Number | 50304 | | Recommended Uses For Product | Gear Oil | | Recommended uses for product | Gear Oil | | SAE J300 Viscosity Grade | 10W-40 | | Specific Uses For Product | Manual transmissions and transaxles, GL-1, GL-3, and GL-4 applications | | UPC | 737534816592 | | Unit Count | 64 Fluid Ounces | | Upper Temperature Rating | 300 Degrees Fahrenheit | | Viscosity | 75W90 | ## Product Details - **Brand:** Red Line - **Item weight:** 903 g - **Liquid volume:** 64 Fluid Ounces - **Package information:** Bottle - **Recommended uses for product:** Gear Oil ## 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) ![Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart (2 Pack) - Image 2](https://m.media-amazon.com/images/I/81M9Tv+BFuL.jpg) ![Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart (2 Pack) - Image 3](https://m.media-amazon.com/images/I/81pOrB1t+nL.jpg) ![Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart (2 Pack) - Image 4](https://m.media-amazon.com/images/I/81zyln3z-IL.jpg) ![Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart (2 Pack) - Image 5](https://m.media-amazon.com/images/I/81eZ7tyT1BL.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 ### ⭐⭐⭐⭐⭐ Liquid gold for Toyotas *by T***S on 8 June 2026* If you own an old Toyota, use redline in your transmission, it's really that simple. Better, smoother, and longer lasting than anything on the market ### ⭐⭐⭐⭐⭐ Scion grinding in 2nd or 3rd? This is what you need! *by A***N on 26 June 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! ### ⭐⭐⭐⭐⭐ It's red line if you know you know *by 2***N on 23 June 2026* I mean does red line really need a review I mean after all it's red line if you know you know ## 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) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/343633702-red-line-50304-mt-90-75w-90-gl-4-manual](https://www.desertcart.tn/products/343633702-red-line-50304-mt-90-75w-90-gl-4-manual) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-07-13*