--- product_id: 19688723 title: "50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart (2 Pack)" brand: "red line" price: "S$118" currency: SGD in_stock: true reviews_count: 13 category: "Red Line" url: https://www.desertcart.sg/products/19688723-50304-mt-90-75w-90-gl-4-manual-transmission-transaxle store_origin: SG region: Singapore --- # Faster, smoother shifts even when cold 75W-90 viscosity for optimal gear protection Safe on brass synchros, no reactive sulfurs 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart (2 Pack) **Brand:** red line **Price:** S$118 **Availability:** ✅ In Stock ## Summary > ⚙️ Shift smarter, drive smoother—don’t let your gears miss a beat! ## Quick Answers - **What is this?** 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?** S$118 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/19688723-50304-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 - • **Trusted Legacy:** Red Line’s proven performance since 1979—no compromises - • **Cold-Start Ready:** Maintains perfect friction coefficient even at low temps - • **Synchro-Safe Formula:** Protects brass synchros by avoiding harmful reactive sulfurs - • **Precision Gear Protection:** Extends synchro life with high-performance GL-4 formula - • **Seamless Shifting Experience:** Eliminates notchy shifts for buttery smooth gear changes ## 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 formula ensures quicker, smoother shifts even in cold conditions, while being safe for brass synchros by excluding damaging reactive sulfurs. Trusted by enthusiasts and professionals alike since 1979, this 2-pack quart set delivers reliable, high-performance gear oil that transforms your driving experience. ## Description Buy Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart (2 Pack): Gear Oils - desertcart.com ✓ FREE DELIVERY possible on eligible purchases 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! Review: Seems to be a very good oem alternate - My 2007 Corolla 5 speed always had a “notchy” first gear engagement when coming to a stop and this was immediately gone when switching to this fluid. Keep in mind when i drained my transmission the old fluid smelled like it was at the end of its life and i have no idea which fluid was in it before as I’ve only put about 15k miles on the car in over a year and a half. Overall I’m very happy with this fluid and it seemed to make shifting overall more smooth. Would recommend ## 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 | B00NT5V8RW | | Best Sellers Rank | #2,002 in Automotive ( See Top 100 in Automotive ) #5 in Gear Oils | | Brand | Red Line | | Brand Name | Red Line | | Compatible Material | Brass Synchros | | Container Type | Bottle | | Customer Reviews | 4.9 out of 5 stars 5,082 Reviews | | Item Form | Oil | | Item Weight | 2 pounds | | Liquid Volume | 64 fluid ounces | | Manufacturer | Red Line | | Model Number | 50304 | | Number of Items | 2 | | Number of Packs | 2 | | Package Information | Bottle | | Part Number | 50304 | | Recommended Uses For Product | Gear Oil | | SAE J300 Viscosity Grade | 75W-90 | | UPC | 737534816592 | | Unit Count | 64 Fluid Ounces | | Viscosity | 75W90 | ## Product Details - **Brand:** Red Line - **Item Weight:** 2 pounds - **Liquid Volume:** 64 fluid ounces - **Package Information:** Bottle - **Recommended Uses For Product:** Gear Oil ## Images ![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) ## Available Options This product comes in different **Size, Number Of Items** 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 ## Customer Reviews ### ⭐⭐⭐⭐⭐ 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! ### ⭐⭐⭐⭐⭐ Seems to be a very good oem alternate *by K***B on July 14, 2026* My 2007 Corolla 5 speed always had a “notchy” first gear engagement when coming to a stop and this was immediately gone when switching to this fluid. Keep in mind when i drained my transmission the old fluid smelled like it was at the end of its life and i have no idea which fluid was in it before as I’ve only put about 15k miles on the car in over a year and a half. Overall I’m very happy with this fluid and it seemed to make shifting overall more smooth. Would recommend ### ⭐⭐⭐⭐⭐ Exactly what I needed. *by R***O on August 4, 2026* Exactly as described. I needed the GL-4 for my 2015 Toyota Tacoma. The gallon size was more convenient for my needs. ## 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.sg/products/19688723-50304-mt-90-75w-90-gl-4-manual-transmission-transaxle](https://www.desertcart.sg/products/19688723-50304-mt-90-75w-90-gl-4-manual-transmission-transaxle) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-08-23*