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Keller-Heartt has Truegard Propylene Glycol Heat Transfer Fluids in both Inhibited and Food Grade! Order Today!
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Frequently asked questions

Find answers to common questions about our products and services
  • T04 is an automatic transmission fluid type specification formulated for use in heavy-duty automatic transmissions found in commercial trucks, buses, and off-highway equipment. This designation indicates the fluid is engineered to meet the performance demands of these high-stress applications.

  • 50WT (50 weight) is a single-grade, higher-viscosity rating, meaning this fluid is thicker than lighter-grade alternatives such as 30WT or 40WT. This heavier viscosity is generally suited for high-load, high-temperature transmission applications where a thicker protective film is required.

  • Mixing transmission fluids of different specifications or base chemistries is generally not recommended, as it can compromise fluid performance and potentially damage seals or internal transmission components. Consult your equipment's OEM service manual before blending this fluid with any other product.

  • A 55-gallon drum is best suited for fleet operations or facilities with high fluid consumption, and it requires appropriate drum-handling equipment such as a drum pump and bung wrench. Proper storage in a cool, dry area away from contaminants is important to maintain fluid integrity over time.

  • Store the drum upright or on its side in a covered, climate-controlled environment, away from direct sunlight, moisture, and extreme temperature fluctuations. Always ensure the bung is tightly sealed after each use to prevent contamination and evaporation.

Key Features

  • T04-Type Automatic Transmission Fluid: Formulated to meet T04-type designation requirements, intended for use in heavy-duty automatic transmissions found in commercial trucks, buses, and off-highway equipment.

  • 50WT Single-Grade Viscosity: The 50 weight rating delivers a higher-viscosity, thicker fluid film compared to lighter-grade alternatives such as 30WT or 40WT, providing added protection under high-load, high-temperature operating conditions.

  • Heavy-Duty Application Suitability: Designed specifically for demanding transmission environments where a thicker protective film is required to maintain fluid integrity and component protection.

  • 55-Gallon Drum Packaging: Ideal for fleet operations and high-consumption facilities; requires appropriate drum-handling equipment such as a drum pump and bung wrench for dispensing.

  • Proper Storage Recommended: Store the drum upright or on its side in a covered, climate-controlled environment, away from direct sunlight, moisture, and extreme temperature fluctuations, with the bung tightly sealed after each use.