TriboDyn Tri-EX² Ceramic Full Synthetic 50W Heavy Duty Gear Oil
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TriboDyn Tri-EX² 50W is a full synthetic heavy-duty gear oil engineered with patented ceramic coating technology — the first oil to receive a United States Functional Patent in over 30 years. This formulation combines advanced synthetic base stocks with a sulfur-phosphorus extreme pressure additive package and friction modifier. The proprietary ceramic technology actively seeks out areas of intense heat and friction to form a self-lubricating ceramic film that not only prevents wear but can help repair minor surface damage.
Meeting or exceeding API MT-1, Eaton PS-386 & PS-164 Rev 7, Navistar/International TMS 6816, Mack TO-A Plus, Meritor O-81, and ZF Freedomline specifications, Tri-EX² 50W delivers unmatched load-carrying capability and extended component life. With a pour point of -36°C for reliable cold starts and exceptional thermal stability for high-temperature protection, this gear oil is ideal for heavy-duty truck transmissions, differentials, and industrial gearboxes requiring a 50W viscosity.
Key Benefits:
- Patented ceramic coating technology that helps repair minor surface damage
- Full synthetic 50W for heavy-duty truck and industrial applications
- Excellent extreme pressure and load-carrying capability
- Strong thermal stability and cold-flow performance (-36°C pour point)
- Broad OEM approvals for heavy-duty truck transmissions and differentials
- Reduces wear and extends component life in demanding conditions
Recommended Applications: Ideal for heavy-duty truck transmissions, differentials, and industrial gearboxes requiring a 50W viscosity, especially in applications where maximum protection and potential surface repair benefits are desired.
Technical Specifications – TriboDyn® Tri-Ex2 50W Full Synthetic Gear Oil
Viscosity @ 100°C (ASTM D445): 18.34 cSt
Viscosity @ 40°C (ASTM D445): 134.7 cSt
Viscosity Index (ASTM D2270): 165
Pour Point (ASTM D97): -32.8°F (-36°C)
API Gravity (ASTM D4052): 34.2
EP Weld Load (ASTM D2783): 620 kg
Scar Diameter @ 400 kg Load (ASTM D2783): 1.79 mm
Coefficient of Friction @ 400 kg (ASTM D2783): 0.115
Recommended for use where the following specifications are required:
API MT-1, API GL-5, Eaton PS-386, PS-164 Rev 7, Navistar/International TMS 6816, Mack TO-A Plus, Meritor O-81, ZF Freedomline, MIL-PRF-2105E / MIL-PRF-2105D, Mack GO-J & GO-H.
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Why TriboDyn TRI-EX2 50W Outperforms Other Gear Oils
APPROVED FOR HEAVY DUTY APPLICATIONS
TRI-EX2 50W is specifically approved for Eaton PS-386 and other heavy-duty truck transmission requirements, providing the exact performance needed for severe service applications in manual transmissions and differentials.
Exceptional Extreme Pressure & Film Strength
Heavy-duty transmissions and differentials face constant high torque and shock loads. TRI-EX2 50W delivers exceptional extreme pressure protection and high film strength, preventing metal-to-metal contact and dramatically reducing wear in severe service applications.
Patented Ceramic Coating Technology
Only TRI-EX2 50W contains the highest level of patented ceramic coating technology. Under extreme heat and pressure it forms a durable self-lubricating ceramic film that actively protects metal surfaces and helps reduce friction and wear.
Quieter Operation & Extended Component Life
The combination of full synthtetic and patented ceramic coating reduces friction, vibration, and noise. TRI-EX2 50W delivers smoother shifting and quieter operation while extending gear and bearing life in heavy-duty applications.
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Meets or Exceeds Demanding Industry Specifications
Eaton PS-386 & PS-164 Rev 7 • API MT-1 • Navistar/International TMS 6816 • Mack TO-A Plus • Meritor® 0-81 • ZF Freedomline • Patented Ceramic Coating Technology • High Moly Content • Superior Film Strength & Extreme Pressure Protection
100% Customer Satisfaction
Hundreds of 5-star reviews • Perfect 100% rating on eBay for over 5 years. You are buying the worlds best oil, our shipping speed, packing, and service is 2nd to none.
Made in the USA
Exclusively manufactured in our own ISO 9001 certified facility. Unmatched purity and quality in every drop.
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Safety Data Sheet (SDS)
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Frequently Asked Questions
TRI-EX2 50W is engineered for up to 8,000+ hours of reliable service in severe-service applications. It is specifically approved for Eaton PS-386 and other heavy-duty specifications, dramatically reducing oil changes, labor, and downtime compared to standard gear oils.
It meets or exceeds Eaton PS-386, API MT-1, and many other heavy-duty OEM specifications. It is fully compatible with most synthetic and conventional gear oils, so you can safely top off or perform a complete change without risking compatibility issues.
The highest level of patented ceramic coating technology actively forms a durable self-lubricating film under extreme heat and pressure. This provides superior protection against wear, helps repair minor surface damage, and delivers smoother, quieter operation than standard gear oils.
TRI-EX2 50W delivers exceptional film strength and extreme pressure protection. It is ideal for heavy-duty differentials, transmissions, and gearboxes that experience high torque and sudden shock loads, significantly reducing wear compared to typical gear oils.
Yes. With a low pour point and excellent cold-flow properties, TRI-EX2 50W provides reliable protection during cold starts and in extreme climates, making it perfect for heavy-duty truck and industrial applications year-round.
TriboDyn oils are developed by world-renowned Tribologists with decades of experience engineering high-performance lubricants for aerospace, heavy industry, and professional racing applications. This deep technical expertise ensures every formulation, including TRI-EX2 50W, delivers professional-grade performance and reliability you can trust in your heavy-duty equipment.
