--- product_id: 259376441 title: "(50304) MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart." brand: "red line" price: "€ 91.27" currency: EUR in_stock: true url: https://www.desertcart.it/products/259376441-50304-mt-90-75w-90-gl-4-manual-transmission-transaxle store_origin: IT region: Italy --- # Friction formula enables quicker, smoother shifts 75W-90 viscosity for optimal gear protection GL-4 safe, protects brass synchros from damage (50304) MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart. **Brand:** red line **Price:** € 91.27 **Availability:** ✅ In Stock ## Summary > ⚙️ Shift into the fast lane of performance and protection! ## Quick Answers - **What is this?** (50304) MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart. by red line - **How much does it cost?** € 91.27 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/259376441-50304-mt-90-75w-90-gl-4-manual-transmission-transaxle) ## 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:** Ideal for GL-1, GL-3, and GL-4 applications plus special synchromesh fluids - • **Precision Gear Protection:** Extends synchro life with advanced GL-4 formulation - • **Trusted Legacy Performance:** Red Line’s proven formula since 1979 outperforms market standards - • **Safe on Sensitive Components:** No reactive sulfurs means zero brass synchro corrosion - • **Seamless Shifting Experience:** Eliminates notchy shifts even in cold starts for flawless control ## Overview Red Line MT-90 75W-90 GL-4 Manual Transmission Lubricant delivers high-performance gear protection and smoother shifting with a specialized friction formula. Compatible with GL-1, GL-3, and GL-4 applications, it safeguards brass synchros by excluding harmful reactive sulfurs. Trusted since 1979, this 1-quart lubricant ensures longer synchro life and reliable transmission performance under all conditions. ## Description (50304) MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart. ## 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 | |---------------|-------| | Manufacturer | Yukon Gear & Axle | | Brand | Red Line | | Product Dimensions | 22.86 x 10.16 x 10.16 cm; 771.11 g | | Item model number | 50304 | | Manufacturer Part Number | 50304 | | OEM Part Number | 50304 | | Item Weight | 771 g | | Viscosity | 75W-90 | ## Product Details - **Material:** Brass - **Brand:** Red Line - **Package information:** Bottle - **Liquid volume:** 32 Fluid Ounces - **Item weight:** 771 g ## Images ![(50304) MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart. - Image 1](https://m.media-amazon.com/images/I/61iZ6pnD7aL.jpg) ## Available Options This product comes in different **Size** options. ## 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 ## Frequently Bought Together - Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL)- 1 Quart - 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.it/products/259376441-50304-mt-90-75w-90-gl-4-manual-transmission-transaxle](https://www.desertcart.it/products/259376441-50304-mt-90-75w-90-gl-4-manual-transmission-transaxle) --- *Product available on Desertcart Italy* *Store origin: IT* *Last updated: 2026-05-10*