Heavy Duty Truck Transmission Fluid

Automatic Transmission Products

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.

Performance

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

Strength

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

Durability

Resists thickening due to high operating temperatures

Powerful Chemistry and Performance

MAG 1 helps optimize the friction, torque and function of your equipment to optimize performance and longevity.

Typical Properties

Viscosity Grade		Full Syn HD 50	Full Syn HD ATF
Brookfield Viscosity at -40°C, cP	ASTM D2983	124,000	8,000
Color	ASTM D1500	1.5	Red
Flash Point °C	ASTM D92	218	220
Flash Point °F	ASTM D92	424	428
Gravity, °API	ASTM D287	30.12	35.42
Pour Point °C (°F)	ASTM D5950	-51°C (-60°F)	-51°C (-60°F)
Specific Gravity @ 60°F (15.6°C)	ASTM D4052	0.8755	0.8477
Viscosity @ 100°C cSt	ASTM D445	18.01	7.349
Viscosity @ 40°C cSt	ASTM D445	122.2	34.81
Viscosity Index	ASTM D2270	164	184

Industry/OEM Approvals

Title	Full Syn HD 50	Full Syn HD ATF
API GL-1 and MT-1	Suitable for Use	-
Mack TO-A Plus	Suitable for Use	-
Meritor O-81	Suitable for Use	-
Navistar/International TMS 6816	Suitable for Use	-
Volvo I-Shift	Suitable for Use	-
ZF Freedomline	Suitable for Use	-
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

Information accurate as of November 11, 2025

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