--- product_id: 548593106 title: "50305 Manual Transmission (MT) 90W Gear Oil - 1 Gallon, (Pack of 4)" brand: "red line" price: "6423.87 DT" currency: TND in_stock: true reviews_count: 2 category: "Red Line" url: https://www.desertcart.tn/products/548593106-50305-manual-transmission-mt-90w-gear-oil-1-gallon-pack store_origin: TN region: Tunisia --- # High-temp stability up to 300°F Enhanced synchro friction for quicker shifts 75W90 viscosity for optimal gear protection 50305 Manual Transmission (MT) 90W Gear Oil - 1 Gallon, (Pack of 4) **Brand:** red line **Price:** 6423.87 DT **Availability:** ✅ In Stock ## Summary > ⚙️ Shift into the fast lane with gear oil that never quits! ## Quick Answers - **What is this?** 50305 Manual Transmission (MT) 90W Gear Oil - 1 Gallon, (Pack of 4) by red line - **How much does it cost?** 6423.87 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/548593106-50305-manual-transmission-mt-90w-gear-oil-1-gallon-pack) ## 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 - • **Versatile Compatibility:** Meets GL-1, GL-3, and GL-4 specs, safe for brass synchros—no corrosive sulfurs. - • **Race-Proven Gear Protection:** Fully synthetic ester-based formula extends synchro life and reduces wear. - • **Smooth, Notchy-Free Shifting:** Optimized friction coefficient ensures seamless gear changes even in cold starts. - • **Thermal Stability Under Pressure:** Maintains consistent viscosity and performance up to 300°F for all driving conditions. - • **Trusted by Experts & Enthusiasts:** Recommended by top transmission shops and racing pros since 1979. ## Overview Red Line 50305 MT-90 is a premium, fully synthetic 75W90 gear oil designed for manual transmissions and front-wheel-drive transaxles. Its ester-based formula delivers superior wear protection, smoother shifting, and thermal stability up to 300°F. Compatible with GL-1, GL-3, and GL-4 applications, it’s trusted by professionals and enthusiasts alike for extending synchro life and eliminating notchy shifts, even in cold conditions. ## Description RED LINE MT-90 HIGH-PERFORMANCE GEAR OIL is a fully-synthetic ester-based lubricant designed for use in manual transmissions and front-wheel-drive transaxles. This shear-stable formula resists breakdown for extended periods and offers more consistent viscosity in warm and cold temperatures for less gear noise and improved shifting. This fluid is less slippery for improved synchronizer coefficient of friction and offers stronger film strength for better wear protection. SINCE 1979 In 1979, Red Line Synthetic Oil began creating lubricants for the racing industry. Today, we manufacture more than 100 quality products, including motor oils, gear oils, assembly lubes, fuel additives and our popular WaterWetter cooling additive for the automotive, motorcycle, marine and industrial markets. TECHNOLOGY Using cutting edge technology, Red Line responds to the technical challenges of today's performance industry. We are enthusiasts that stay on top of each market niche, ensuring product recommendations that result in serious performance gains. We use this knowledge of racing to create high-performance products for track cars and street vehicles. Red Line products perform and protect better than any on the market. No compromises. Review: Great, fast delivery and service. Thanks Review: If this brand hadn’t been recommended by a very reputable transmission shop I wouldn’t have paid this much for it! ## 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 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000T9TMX8 | | Brand Name | Red Line | | Container Type | Jug | | Customer Reviews | 4.5 4.5 out of 5 stars (8) | | Global Trade Identification Number | 00083522503259 | | Item Form | Fluids,Liquid,Oil | | Item Weight | 4.54 kg | | Liquid Volume | 512 Fluid Ounces | | Manufacturer | Red Line | | Material | Synthetic | | Recommended Uses For Product | Lubricant | | Specific Uses For Product | Manual transmissions and transaxles (Nissan, Toyota, Mazda, and other selected applications) | | UPC | 083522503259 | | Unit Count | 512 Milliliters | | Upper Temperature Rating | 300 Degrees Fahrenheit | | Viscosity | 75W90 | ## Product Details - **Brand:** Red Line - **Item weight:** 4.54 kg - **Liquid volume:** 512 Fluid Ounces - **Material:** Synthetic - **Package information:** Jug ## Images ![50305 Manual Transmission (MT) 90W Gear Oil - 1 Gallon, (Pack of 4) - Image 1](https://m.media-amazon.com/images/I/715jWOKbhPL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by T***L on 15 March 2022* Great, fast delivery and service. Thanks ### ⭐⭐⭐ Review *by O***T on 5 December 2023* If this brand hadn’t been recommended by a very reputable transmission shop I wouldn’t have paid this much for it! --- ## 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/548593106-50305-manual-transmission-mt-90w-gear-oil-1-gallon-pack](https://www.desertcart.tn/products/548593106-50305-manual-transmission-mt-90w-gear-oil-1-gallon-pack) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-10-08*