Caterpillar TO-4 Fluid

Phillips 66®PowerDrive Fluid is a high-performance multi-functional fluid developed for use in transmissions, final drives and hydraulic systems of off-highway equipment where a fluid meeting Caterpillar TO-4 performance requirements is specified. It provides substantially improved friction and antiwear performance compared with older API CD/TO-2 quality fluids, resulting in longer equipment life and reduced risk of field failure. The SAE 10W and 30 viscosity grades also are recommended for use in Allison off-highway heavy-duty automatic transmissions where a C-4 quality fluid is specified.

Features & Benefits

• Well-balanced frictional properties for efficient clutch operation and improved wet brake performance

• Excellent oxidation resistance and thermal stability for long fluid life

• High load-carrying capacity for protection of final drive gear sets

• Excellent deposit control and wear protection

• Protects yellow metals against corrosion

• High shear stability

• Compatible with a wide variety of seals and friction materials

• Good low-temperature properties

• Good foam resistance


• Powershift transmissions, hydrostatic transmissions, torque converters, final drives and hydraulic systems of Caterpillar, Euclid, Komatsu and other off-highway construction and mining equipment

• Heavy-duty automatic transmissions where the OEM specifies an Allison C-4 quality fluid

• Heavy-duty manual and semi-automatic transmissions in trucks and buses where the OEM specifies a Caterpillar TO-4 quality fluid or a heavy-duty engine oil

Technical Details

Licenses & Approvals

PowerDrive Fluid SAE 30 is OEM-approved for service fill in the following applications:

• Allison TES-439, for off-highway applications (approval no. 439-33372012)

PowerDrive Fluid meets or exceeds the requirements of:

• Caterpillar TO-4, TO-2(1)

• Vickers (Eaton) M-2950-S

PowerDrive Fluid is recommended for service fill in:

• ZF torque converter transmissions in off-highway equipment where the OEM specifies a TE-ML03C quality lubricant (SAE 10W, 30)

(1)Obsolete specification.

Additional Details
SAE Grade10W
Specific Gravity @ 60°F0.875
Density, lbs/gal @ 60°F7.29
Color, ASTM D15002.5
Flash Point (COC), °C (°F)213 (415)
Pour Point, °C (°F)-39 (-38)
Viscosity, Brookfield
cP @ -35°C45500
Viscosity, Kinematic
cSt @ 40°C43
cSt @ 100°C6.6
Viscosity Index105
Total Base Number (TBN), ASTM D28967.6
Zinc, wt %0.11