What Is Gear Oil? Types, Viscosity, and Uses

Gear oil is a specially formulated fluid designed to ensure the efficient operation and long lifespan of gear systems in automotive and marine applications. It should not be confused with engine oil, as gear oil meets different requirements and contains special additives that protect gear mechanisms.

Main Functions of Gear Oil

Gear oil performs several important functions:

Protection of Gears and Mechanisms

Gear oils reduce friction and minimize wear on gears and bearings.

Heat Regulation

Gear oil absorbs the heat generated during operation and ensures protection of components even under high pressure.

Resistance to High Pressure and Shock Loads

In components like differentials and transfer cases that operate under high pressure, gear oil provides protection against shock loads through special additives.

System Cleanliness

The oil prevents the formation of deposits and helps maintain smooth gear operation.

Types and Characteristics of Gear Oil

Gear oil is produced in various types and formulations. Maximum offers users a wide range of quality gear oil products.

Manual Transmission Fluid (MTF)

Manual gear oil is designed for manual transmission systems.

Characteristics:

Use: Vehicles with manual transmission systems.

Automatic Transmission Fluid (ATF)

Automatic gear oil is used in automatic transmissions.

Characteristics:

Use: Vehicles with automatic transmissions.

Differential Gear Oil

Differential gear oil is designed for gear systems that allow wheels to rotate at different speeds.

Characteristics:

Use: Differentials and other high-load gear systems.

Transfer Case Fluid

Used in transfer cases that distribute power to all wheels in 4WD and AWD vehicles.

Characteristics:

Use: 4WD and AWD systems.

Mineral vs Synthetic Gear Oil

Maximum offers both mineral and synthetic gear oils.

Mineral Gear Oil

Synthetic Gear Oil

Why Is Viscosity Important?

Gear oil viscosity indicates the thickness of the oil.

For example, a 75W-90 viscosity grade:

Thicker oils offer better protection under high heat and pressure, commonly used in manual transmissions. Automatic transmissions typically require lower-viscosity oils.

Factors to Consider When Using Gear Oil

Choosing the Right Type

Viscosity and API Standards

Do Not Mix Mineral and Synthetic Oils

Mixing different types can cause performance loss and system damage.

Gear Oil Maintenance and Efficient Use

Regular Level Checks

Gear oil levels must be checked regularly. Low oil levels can damage gear mechanisms.

Oil Replacement

Temperature Control

High heat and extended operation affect oil quality.
Oxidized or thinned oil can damage the gear system.

With Maximum gear oil products, you get:

Choosing the right gear oil and maintaining it properly ensures maximum vehicle performance and long-term safety.

 

12 Déc 2025 What Is Gear Oil? Types, Viscosity, and Uses
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