--- product_id: 535559924 title: "Synergy Gear MT 75W-90 GL-4 (MT-90); Full Synthetic Manual Trans Fluid; Smooth Shifting; No Sticking, Slipping, Vibration, or Shudder; Yellow Metal Safe (1 Gallon)" brand: "triax" price: "554.45 DT" currency: TND in_stock: true reviews_count: 10 category: "Triax" url: https://www.desertcart.tn/products/535559924-synergy-gear-mt-75w-90-gl-4-mt-90-full store_origin: TN region: Tunisia --- # Full synthetic for max efficiency 75W-90 viscosity grade Yellow metal safe, no corrosion Synergy Gear MT 75W-90 GL-4 (MT-90); Full Synthetic Manual Trans Fluid; Smooth Shifting; No Sticking, Slipping, Vibration, or Shudder; Yellow Metal Safe (1 Gallon) **Brand:** triax **Price:** 554.45 DT **Availability:** ✅ In Stock ## Summary > ⚙️ Shift Smooth, Drive Confident: The Ultimate Manual Transmission Ally ## Quick Answers - **What is this?** Synergy Gear MT 75W-90 GL-4 (MT-90); Full Synthetic Manual Trans Fluid; Smooth Shifting; No Sticking, Slipping, Vibration, or Shudder; Yellow Metal Safe (1 Gallon) by triax - **How much does it cost?** 554.45 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/535559924-synergy-gear-mt-75w-90-gl-4-mt-90-full) ## Best For - triax enthusiasts ## Why This Product - Trusted triax brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Synchro Safe Tech:** No reactive sulfurs—protects sensitive yellow metals, brass, copper, and aluminum components flawlessly. - • **Endurance Champion:** Supports 100,000+ mile drain intervals, cutting maintenance frequency and costs. - • **Universal Compatibility:** Trusted by top brands like BMW, Jeep, Mercedes, and Toyota—fits wherever GL-4 fluids are specified. - • **Seamless Shifting Mastery:** Friction-optimized formula ensures silky smooth gear changes with zero sticking or slipping. - • **High-Performance Protection:** Engineered for high horsepower and extreme conditions, from racing to off-road adventures. ## Overview Triax Synergy Gear MT 75W-90 GL-4 is a premium full synthetic manual transmission fluid designed for superior shifting performance and extended drain intervals. Compatible with a wide range of vehicles, it protects sensitive yellow metals and withstands high stress conditions, delivering reliable, smooth gear engagement without slipping, sticking, or shudder. ## Description Buy TRIAX Synergy Gear MT 75W-90 GL-4 (MT-90); Full Synthetic Manual Trans Fluid; Smooth Shifting; No Sticking, Slipping, Vibration, or Shudder; Yellow Metal Safe (1 Gallon): Gear Oils - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: Better than Motorcraft in Miata - This is better than the Motorcraft stuff in my NC Miata. It has allowed me to stop worrying about how it shifts and just drive. And it’s a lot cheaper. Review: affordable and effective - 2014 Tacoma 2wd 4cyl 5sp R155 transmission. Ran Redline MT-90 with 30K mi. OC intervals for the first 8 years before switching to Ford Motorcraft XT-M5-QS. Motorcraft shifted better in winter. After 18K mi on this last fill of Motorcraft the shifting became notchy when warm, so I'm trying this less expensive Triax. I immediately noticed easier shifting into 1st and reverse. Triax seems to be more viscous and so far has improved shifting in all gears, in all temperatures, although a little stiffer than Motorcraft when very cold. Triax performs similar to Redline when warm. If Triax remains affordable I will continue to use it, since it's performance is acceptable. I don't know if the claimed extended OC intervals are possible, but if so, TRIAX Synergy Gear MT 75W-90 GL-4 (MT-90) should an excellent choice. My transmission only needs 2.7 qts. 1 gal. costs less than 3 qts. However gallons were not available when I ordered. ## Features - Widely compatible with a huge range of manual transmissions from top manufactuers Jeep, Chrysler, BMW, VW/Audi, Ford, GM, Mercedes Benz 235.11, Toyota, Mazda and many others; Use wherever SAE 75W-90 GL-4 fluids are specified - Frictionally optimized for exceptionally smooth shifting, synchronizer engagement, and frictional stability; Prevents transmssion shudder, gear sticking or slipping. Optimal torque transfer and power curve stability. - 100% Synchro Safe - No reactive sulfurs; yellow metal / brass synchro safe as well as copper and aluminum alloys found in sensitive transmission components. - Excellent gear protection in high horsepower / high speed conditions and sustained mechanical / thermal loads such as racing and off-road conditions - Capable of 100,000+ miles drain intervals in most driving conditions, allowing for much longer life than most other fluids. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0C5JX2LJ1 | | Best Sellers Rank | #8,598 in Automotive ( See Top 100 in Automotive ) #21 in Gear Oils | | Brand | Triax | | Brand Name | Triax | | Container Type | Bottle | | Customer Reviews | 4.8 out of 5 stars 348 Reviews | | Item Form | Liquid | | Liquid Volume | 1 Gallons | | Manufacturer | Triax Lubricants LLC | | Material | Full Synthetic Fluid | | Number of Items | 1 | | Package Information | Bottle | | Part Number | 75W-90GL4 | | Recommended Uses For Product | Wherever GL-4 / GL-3 and synchromesh manual transmission fluids are recommended. | | SAE J300 Viscosity Grade | 75W-90 | | Specific Uses For Product | Wherever GL-4 / GL-3 and synchromesh manual transmission fluids are recommended. | | UPC | 850023978691 | | Unit Count | 128.0 Fluid Ounces | | Viscosity | 75W90 / MT 90 | ## Product Details - **Brand:** Triax - **Liquid Volume:** 1 Gallons - **Material:** Full Synthetic Fluid - **Package Information:** Bottle - **Recommended Uses For Product:** Wherever GL-4 / GL-3 and synchromesh manual transmission fluids are recommended. ## Images ![Synergy Gear MT 75W-90 GL-4 (MT-90); Full Synthetic Manual Trans Fluid; Smooth Shifting; No Sticking, Slipping, Vibration, or Shudder; Yellow Metal Safe (1 Gallon) - Image 1](https://m.media-amazon.com/images/I/71mcnFWt8nL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Suitable for GM NV4500 5 Speed?** A: GL-4 gear oil. Check your manufacturers specifications. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Better than Motorcraft in Miata *by D***E on May 19, 2026* This is better than the Motorcraft stuff in my NC Miata. It has allowed me to stop worrying about how it shifts and just drive. And it’s a lot cheaper. ### ⭐⭐⭐⭐⭐ affordable and effective *by D***R on February 19, 2026* 2014 Tacoma 2wd 4cyl 5sp R155 transmission. Ran Redline MT-90 with 30K mi. OC intervals for the first 8 years before switching to Ford Motorcraft XT-M5-QS. Motorcraft shifted better in winter. After 18K mi on this last fill of Motorcraft the shifting became notchy when warm, so I'm trying this less expensive Triax. I immediately noticed easier shifting into 1st and reverse. Triax seems to be more viscous and so far has improved shifting in all gears, in all temperatures, although a little stiffer than Motorcraft when very cold. Triax performs similar to Redline when warm. If Triax remains affordable I will continue to use it, since it's performance is acceptable. I don't know if the claimed extended OC intervals are possible, but if so, TRIAX Synergy Gear MT 75W-90 GL-4 (MT-90) should an excellent choice. My transmission only needs 2.7 qts. 1 gal. costs less than 3 qts. However gallons were not available when I ordered. ### ⭐⭐⭐⭐⭐ Smoother than ever !!! *by G***A on April 2, 2026* I own a 1978 VW Bus, and after replacing the shifter bushings, the shifting improved significantly just by eliminating the excess free play. Next, I decided to replace the transmission fluid. I was tempted to try a synthetic formula to see if it would make shifting even smoother. However, I learned that not all synthetic fluids are suitable for older vehicles with brass synchros due to potential corrosion issues. That’s when I found Triax, which addresses this concern, so I decided to give it a try—and WOW. This nearly 50-year-old transmission is now shifting smoother than ever. With the new shifter bushings and this excellent fluid, it’s now a real pleasure to drive my old Westy. --- ## 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/535559924-synergy-gear-mt-75w-90-gl-4-mt-90-full](https://www.desertcart.tn/products/535559924-synergy-gear-mt-75w-90-gl-4-mt-90-full) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-08-08*