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MAG 1® Full Synthetic Heavy Duty Automatic Transmission Fluid

Heavy Duty Truck Transmission Fluid Automatic Transmission Products

MAG 1 Full Synthetic Heavy Duty Automatic Transmission Fluid is formulated for use in heavy duty truck or bus transmissions that undergo severe duty and extended drain. It is formulated with full synthetic base oil and advanced additives to provide outstanding cold temperature performance and protect against corrosion, oxidation and deposits. 

Evolutionary Performance™

Heavy duty truck transmissions have evolved dramatically, requiring highly specialized fluids for unique applications. One brand has evolved right alongside – MAG 1®. Only the most advanced transmission fluids meet the difficult challenges of effectively balancing performance, strength and durability. 

Featuring MAG 1® with FMX® Technology - Friction Management for Xtreme protection™. FMX technology provides unsurpassed protection and performance.


  • Delivers superior friction stability to maintain smooth, consistent shifting and reduce shudder.


  • Provides a strong fluid film to prevent metal-to-metal contact between rotating parts to prevent wear.


  • Resists thickening due to high operating temperatures.    


  • Heavy-duty automatic transmissions in trucks and buses in extended drain or severe service, such as in intra-city transit buses, intercity tour coaches, school buses, emergency vehicles, recreational vehicles, refuse vehicles, and commercial utility vehicles.

Industry/OEM Specifications

Allison TES-295 MAG 1 Recommends this product for use in applications calling for this specification
Allison TES-389 MAG 1 Recommends this product for use in applications calling for this specification

  • *Allison TES-295 and TES-389 are registered trademarks of Allison Transmissions, Inc.

Typical Properties

Brookfield Viscosity at -40°C, cP ASTM D2983 8,000
Color ASTM D1500 Red
Flash Point °C ASTM D92 220
Flash Point °F ASTM D92 428
Gravity, °API ASTM D287 35.42
Pour Point °C (°F) ASTM D5950 -51°C (-60°F)
Specific Gravity @ 60°F (15.6°C) ASTM D4052 0.8477
Viscosity @ 100°C cSt ASTM D445 7.349
Viscosity @ 40°C cSt ASTM D445 34.81
Viscosity Index ASTM D2270 184

Container/Bulk Availability

3/1 Gallon Product Number - 67077
5 Gallon Pail Product Number - 69934
55 Gallon Drum Product Number - 67076
Available in Bulk