{"product_id":"triax-synergy-gear-mt-75w-80-gl-4-full-synthetic-transmission-fluid","title":"TRIAX Synergy Gear MT 75W-80 GL-4 Full Synthetic Manual Gear Oil","description":"\u003cp\u003eIn this review the TRIAX Synergy Gear MT 75W-80 GL-4 is evaluated as a full synthetic manual transmission and gear lubricant aimed at drivers who want OEM-level protection with extended drain intervals. The bottom line: this fluid is for owners of manual transmissions, differentials and transfer cases who need a GL-4 viscosity with excellent low temperature flow and strong yellow metal protection. It stands out for long drain life and smooth, rapid shifting while matching or exceeding many OEM 75W-80 requirements.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull synthetic formulation:\u003c\/strong\u003e PAO and esters give superior shear stability and thermal resistance to maintain film strength under heavy load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e75W-80 GL-4 designation:\u003c\/strong\u003e Optimized viscosity for a wide range of manual transmissions, differentials and transfer cases requiring GL-4 performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYellow metal protection:\u003c\/strong\u003e No reactive sulfurs and corrosion inhibitors protect brass synchros and other yellow metal components from wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow temperature performance:\u003c\/strong\u003e Arctic-grade cold flow with a very low pour point for reliable shifting in severe cold climates.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced additives:\u003c\/strong\u003e A custom detergency and friction modifier package improves shifting feel, reduces notchy or grinding noise, and defends against contamination.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtended drain capability:\u003c\/strong\u003e Very long drain intervals claimed-up to five times OEM intervals when service conditions allow.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis fluid is aimed at drivers of passenger cars and SUVs with manual transmissions or transfer cases that specify a 75W-80 GL-4 lubricant, including models from Honda, Acura, Toyota, BMW, Audi, Mini, Jeep, Chrysler, Ford and Mercedes Benz. It is a good fit for enthusiasts who replace factory fluids with a synthetic that emphasizes shift quality, seal health and long service life.\u003c\/p\u003e\u003cp\u003eThose who should look elsewhere include owners who explicitly require a GL-5 or 75W-90 gear oil, or vehicles with manufacturer mandates for a branded fluid that specifies unique additives not described here. Also check manufacturer guidance before using in limited-slip applications or where a specific OEM fluid spec is mandatory.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eExcellent shiftability and rapid, smooth shifting with reduced notchy feeling.\u003c\/li\u003e\n\u003cli\u003eFull synthetic PAO\/ester base offers high viscosity index and thermal stability for long service life.\u003c\/li\u003e\n\u003cli\u003eEffective yellow metal protection and corrosion inhibitors safe for synchros.\u003c\/li\u003e\n\u003cli\u003eLow pour point and arctic-grade flow aid cold-weather starts and shifting.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eNot suitable where a GL-5 or a specific OEM-branded gear oil is required by the manufacturer.\u003c\/li\u003e\n\u003cli\u003eExtended drain claims depend on service conditions and may not replace routine inspections.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eFull synthetic manual transmission and gear lubricant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eViscosity grade\u003c\/td\u003e\n\u003ctd\u003e75W-80\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGear spec\u003c\/td\u003e\n\u003ctd\u003eGL-4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBase oils\u003c\/td\u003e\n\u003ctd\u003ePAO and esters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCold performance\u003c\/td\u003e\n\u003ctd\u003eArctic grade with very low pour point\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eViscosity index\u003c\/td\u003e\n\u003ctd\u003e204 VI Index, extreme stability\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack size\u003c\/td\u003e\n\u003ctd\u003e6 quart pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe TRIAX Synergy Gear MT 75W-80 GL-4 is a well-balanced synthetic choice for manual transmissions and transfer cases needing 75W-80 GL-4 fluid; it delivers smooth, responsive shifting, strong yellow metal protection and excellent low temperature flow, making it a cost-effective alternative to higher-priced performance oils for most passenger cars and SUVs.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eCan this fluid be used in transfer cases?\u003c\/strong\u003e\u003cbr\u003eYes, it is formulated for use in many transfer cases that call for a GL-4 75W-80 grade, but verify the vehicle manufacturer requirements first.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill it harm brass synchros?\u003c\/strong\u003e\u003cbr\u003eNo, the formulation avoids reactive sulfurs and includes corrosion inhibitors specifically to protect yellow metal components like brass synchros.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow often should the oil be changed?\u003c\/strong\u003e\u003cbr\u003eThe product claims very extended drain intervals up to five times OEM intervals in suitable service, but actual intervals should follow driving conditions and manufacturer guidance.\u003c\/p\u003e","brand":"Triax","offers":[{"title":"Default Title","offer_id":48155585151195,"sku":"B08W8YGRP7","price":64.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/81Jok-yCM2L._SL1500.jpg?v=1768766904","url":"https:\/\/gearmusthave.com\/products\/triax-synergy-gear-mt-75w-80-gl-4-full-synthetic-transmission-fluid","provider":"GearMustHave","version":"1.0","type":"link"}