TRIAX ULV ATF 4 Gallon Pack - Full Synthetic Ultra Low Viscosity

Our review of the TRIAX ULV ATF 4 Gallon Pack finds it built for owners of modern 8- and 10-speed transmissions who want smoother shifts and extended service intervals. This reviewer found the single biggest reason to buy is the combination of ultra low viscosity performance and long drain capability, which together reduce wear and maintain shift quality under towing or heavy loads. The fluid's formulation aims to eliminate shudder and slipping while remaining compatible with a wide range of OEM ULV specifications, making it a practical choice for both daily drivers and trucks used for towing.

Key Features

• Frictional Optimization Technology: Provides ultra-smooth shifting and reduces shudder or gear sticking even under severe loads like towing or hauling.
• Extended Drain Intervals: Offers long drain intervals of up to 150,000 miles for standard driving and 70,000 miles for heavy-duty use, lowering maintenance frequency.
• Cold Weather Ready: Engineered with a pour point down to -50F to preserve performance and fuel economy in freezing temperatures.
• OEM Replacement: 100% synthetic ATF compatible with Mercon ULV, Dexron ULV, WSS-M2C949-A and MB 2236.17 for broad vehicle coverage.
• Advanced Compatibility: Works with many GM 10-speed applications including 10L80/10L90 and recent full-size trucks and performance models.

Who It's For

The TRIAX ULV ATF 4 Gallon Pack is aimed at owners of modern 8- and 10-speed transmissions who need a high-performance, OEM-compatible fluid for long service intervals and heavy-duty use. It is especially relevant for drivers of late-model GM trucks and performance cars where ULV specifications are required, or for fleets that benefit from fewer fluid changes and reliable cold-start behavior.

Customers who should look elsewhere include owners of older transmissions that call for conventional ATF types or specialty fluids outside the ULV category, and anyone who needs a smaller retail bottle rather than a bulk 4 gallon pack for a single fluid top-up.

Pros & Cons

Pros

• Delivers noticeably smoother shifting and reduces shudder under load, matching customer reports about improved shift quality.
• Very long drain intervals mean lower overall maintenance costs for typical driving or fleet use.
• Excellent cold-weather performance with a very low pour point for reliable operation in freezing climates.
• Broad OEM compatibility makes it suitable for many European and US vehicles requiring ULV fluids.

Cons

• Sold as a 4 gallon pack which is great for multiple services but may be excessive for a single small repair or occasional user.
• Specific ULV compatibility is essential; owners must verify their manufacturer specification match before use.

Specifications

Our Verdict

The TRIAX ULV ATF 4 Gallon Pack is a smart buy for owners and fleet managers running modern 8- and 10-speed transmissions who value long service intervals, reliable cold-weather operation, and OEM ULV compatibility. It represents good value when multiple fills are needed or for scheduled maintenance, delivering measurable shift quality and durability improvements without sacrificing compatibility.

Frequently Asked Questions

Is this fluid compatible with GM 10-speed transmissions?
Yes, the formulation is listed as compatible with GM 10L80/10L90 and many 10-speed applications noted in the product compatibility list.

How long can I go between fluid changes?
Specified drain intervals are up to 150,000 miles for standard driving and 70,000 miles for heavy-duty use, but always follow vehicle manufacturer guidance.

Will it perform in extreme cold?
Yes, the fluid is engineered with a pour point down to -50F to preserve shift quality and fuel economy in freezing temperatures.