Sinclair TO-4 Torque Fluid SAE 10

Sinclair Agriculture & Construction Equipment Industrial Lubricants and Greases

Sinclair TO-4 Torque Fluid SAE 10 is a multipurpose lubricant formulated for transmissions, wet brakes and hydraulic systems whenever a fluid meeting Caterpillar® TO-4 requirements is needed. With its excellent hydraulic oil stability and protection against high-pressure pump wear, it offers the following benefits:

  • Reduced operational cost.
  • Smoother operation.
  • Extended oil life.

Formulated for the Driveline Designs of Today

There have been dramatic changes in drivelines, and there is a need for specialized fluids that meet the needs of unique applications. Sinclair TO-4 Torque Fluid SAE 10 is an advanced driveline fluid engineered to achieve the ideal balance of protection, toughness, and endurance.


  • Formulated for excellent operation in a wide range of operating temperatures and applications.


  • Metal-to-metal contact between rotating parts is mitigated via a strong oil film barrier that extends the life of your equipment and prevents wear.


  • Combats rust while performing well even with some water present and offers outstanding thermal and oxidation stability.


  • Designed for transmissions, wet brakes, and hydraulic systems whenever a fluid meeting C-4 or TO-4 requirements is needed.

Industry/OEM Specifications

Allison C-4 Meets Requirements
CAT TO-4 Meets Requirements
Vickers Meets Requirements
ZF TE-ML 03C Meets Requirements
CAT TDTO Suitable for Use
CAT TO-2 Suitable for Use

Typical Properties

Color ASTM D1500 2.0
Flash Point °C ASTM D92 210
Flash Point °F ASTM D92 410
Gravity, °API ASTM D287 30.75
Specific Gravity @ 60°F (15.6°C) ASTM D4052 0.8721
Viscosity @ 100°C cSt ASTM D445 6.929
Viscosity @ 40°C cSt ASTM D445 43.25
Viscosity Index ASTM D2270 118

Container/Bulk Availability

330 Gallon Tote Product Number - 531-002
55 Gallon Drum Product Number - 531-003
Available in Bulk