4.95 / 5.0
(19) 19 total reviews
Full synthetic 75W-90 GL-5 limited-slip gear oil for high-load differentials, axles, and manual transmissions in a wide range of vehicles. Exceeds the Eaton E500 spec for 500,000 mile drain intervals.
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Description
TRIAX Synergy Gear Max full synthetic gear lubricants are extreme performance extreme pressure, API GL-5 Limited Slip gear oils designed for a very wide range of applications and gear systems. They are built with a top tier proprietary additive system and select base oils, delivering exceptional performance, gear protection, in high load, high torque applications. Triax Synergy Gear Max oils are extremely stable even in very high stress conditions, without loss of viscosity and facilitate extreme long drain intervals of 750,000 miles for highway trucks and 500,000 miles for other vehicles.
Applications include hypoid gear systems, manual transmissions, axles and differentials in a very wide range of applications, both with and without limited slip requirements in heavy duty trucking, construction, mining, buses, passenger cars, racing, agriculture.
- Prevents micro pitting, fatigue wear and normal scuffing under high load, high temperature conditions.
- Dramatically improves gear, bearings and transmission life.
- Extremely long drain intervals and provides significant savings from down time and fluid costs
- Stays in grade in both very high and very low temperature operations
- Compatible with most mineral gear oils. Allows easy changeover from mineral to synthetic.
- Also provides a wide range of compatibility with transmission seals, soft metals and ferrous and non-ferrous transmission / gear box components
- Proven protection far beyond spec requirements, delivers excellent EP (extreme pressure) and AW (anti-wear) performance in a wide range of LS and NON-LS gear systems, with hypoid and other gears
LIMITED SLIP READY - No need for additional aftermarket additives.
Viscosity Grades: 75W90, 75W140
Specifications
- API GL-5 Limited Slip
- API MT-1
- Mack GO-J Plus
- Mercedes Benz 235.8
- U.S. Steel 224
- ZF TE-ML 05B/16F/21B
See data sheet for full specs.

At 20,000 miles the front diff had a low pitched hum at lower rpms. Drained OEM 75W90 gear oil...was 375cc below fill amount. Replaced with Triax product ,corrected level with resolution of whine.
Excellent oil for gear box for my truck Volvo VNL 860 ratio 3.07.
Exceelllent gear oil. Using it in my tractors and truck. Quiet a s smooth operation. Couldnt be happier.
Excellent in my Ram3500.
I just reached my 400 hour service. I am putting this oil in this weekend. It appears to be a good quality oil but I will monitor how well it lubricates going forward.
Seriously , Please sell in a jug that the fluid pumps attach to. I had to transfer the lube to an old oil bottle to pump.
I like the gear max product and the pricing is well below the OEM equivalent. I have one minor complaint. I have a 5-gal bucket pump...where the hell's the bucket???
Will continue to buy in 5-gal container and save my old 5-gal bucket to refill. Pain in the ass!
Great price. Great shipping. Perfect replacement for my 2024 2500HD rear gear oil.
I used Triax 75W90 GL-5 in both gear boxes on my new PTO tiller. I always trust Triax with my equipment. Simply the best.
Changed the differential fluid in my 04 AWD Yukon. Used TRIAX Synergy Gear Max 75W-90 GL-5. Definitely notice the differentials are noticeably quieter.
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