--- 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: "S$210" currency: SGD in_stock: true reviews_count: 8 category: "Red Line" url: https://www.desertcart.sg/products/592333607-red-line-50304-mt-90-75w-90-gl-4-manual store_origin: SG region: Singapore --- # Friction formula enables quicker, smoother shifts 75W-90 viscosity for optimal gear protection GL-4 safe for brass synchros, prevents corrosion Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart (4 Pack) **Brand:** red line **Price:** S$210 **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?** S$210 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/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 - • **Trusted Legacy:** Red Line’s proven performance since 1979 means no compromises - • **Bulk Value Pack:** Four quarts ensure you’re always ready for smooth transmission care - • **Effortless Shifting:** Eliminates notchy shifts even in cold starts for seamless driving - • **Versatile Compatibility:** Ideal for GL-1, GL-3, and GL-4 applications plus special synchromesh fluids - • **Precision Gear Protection:** Extends synchro life with high-performance GL-4 formula ## Overview Red Line 50304 MT-90 is a premium 75W-90 GL-4 manual transmission lubricant designed to protect gears and extend synchro life. Its unique friction formula ensures quicker, smoother shifts even in cold conditions, while being safe for brass synchros and preventing corrosion. Trusted since 1979, this 4-pack offers professional-grade reliability for GL-1, GL-3, and GL-4 applications. ## Description Product description Review: Worked as advertised - Tried another fluid prior to this which resulted in hard shifts. This is a perfect fluid for Jeep with AX15 transmission. Far better shifting even in cold weather Review: Smother shifting - Seems to have made my shifting smoother, 1st gear is still tricky but I do not believe that’s from MT-90… 1999 Jeep Wrangler Sport 4.0L 5 speed ## 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 | #45,315 in Automotive ( See Top 100 in Automotive ) #71 in Gear Oils | | Brand | Red Line | | Brand Name | Red Line | | Container Type | Bottle | | Customer Reviews | 4.8 out of 5 stars 65 Reviews | | Included Components | (1063017) MT-90 75W90 GL-4 - QUART | | Item Form | Oil | | Item Type Name | ENGINE OIL | | Item Weight | 2 Pounds | | Liquid Volume | 128 Fluid Ounces | | Manufacturer | Red Line | | Material | Oil | | Model Number | 50304 | | Number of Items | 4 | | Package Information | Bottle | | Part Number | 50304 | | Recommended Uses For Product | Automotive | | Specific Uses For Product | Prevent Corrosion | | Unit Count | 128.0 Fluid Ounces | | Viscosity | 75W-90 | | Warranty Description | LIMITED WARRANTY | ## 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 ### ⭐⭐⭐⭐⭐ Worked as advertised *by G***G on February 12, 2024* Tried another fluid prior to this which resulted in hard shifts. This is a perfect fluid for Jeep with AX15 transmission. Far better shifting even in cold weather ### ⭐⭐⭐⭐⭐ Smother shifting *by J***N on June 2, 2026* Seems to have made my shifting smoother, 1st gear is still tricky but I do not believe that’s from MT-90… 1999 Jeep Wrangler Sport 4.0L 5 speed ### ⭐⭐⭐⭐⭐ Very good *by W***E on May 6, 2026* Works good. ## 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) --- ## 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.sg/products/592333607-red-line-50304-mt-90-75w-90-gl-4-manual](https://www.desertcart.sg/products/592333607-red-line-50304-mt-90-75w-90-gl-4-manual) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-08-17*