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Additive friction modifier in transmission

    What is additive friction modifier (AFM) and why should I care?

    Additive Friction Lubricant (AFL) is a chemical compound used as a friction modifier in gear oils. AFL reduces friction by creating a thin film of oil between two surfaces. AFMs are typically polymers or waxes that coat surfaces and form a protective layer over them. This helps prevent wear and tear, extending the life of machinery.


    The Progression of Friction Modifiers

    Friction modifiers in engine oils can trace back to 1915. They’re used first in differentials and wet clutches. Their use escalated significantly in the late 1970s when fuel economy was becoming increasingly important. Fuel economy became very high priority in the 1980s, leading to the introduction of friction modifers in passenger car motor oils in the early 1990s. Today, most friction modifiers in use are designed to reduce friction for better fuel economy. In recent years, the U.S government has set higher CAFE standards for both gas and diesel vehicles. These new standards aim to raise CAFE to 54.5 mpg by 2025.

    Lubricants are used to make engines run smoothly. Viscosity is reduced by adding friction modifiers. These additives attach to the metal surfaces of the engine, reducing friction. Friction modifiers are very effective when there is metal-to-metal surface contact. Organic friction modifiers have a polar head that attaches to the metal surfaces and a chain of molecules that lines up next to each other.

    Polar heads are made up of phosphoric acid (H3PO4), phosphonic acid (HPO3OH) or phosphoric ester. They are also known as phosphates. Their molecules are bonded together by a strong covalent bond. Mono-layers are formed when the molecule is flat. Thick, reacted viscous layers are created when the molecules are bound together by hydrogen bonds. Shearing easily creates a slippery surface.


    Organic Friction Modifiers

    Molybdenum ditthiocarbamate (MDC) is used as an additive in engine oil. It helps reduce wear and tear on engines. It also reduces the amount of smoke produced when driving. Molybdenum disulfide (MoS2), a compound similar to MDC, is used in lubricants because it reduces friction. The sulfur atoms in MoS2 bond with oxygen molecules in the air, creating a protective layer over the surface of the metal. This prevents oxidation and corrosion. Molybdenium disulfide is also used in some greases.

    Friction modifiers are used to reduce wear and tear on metal parts. They protect the metal by forming a protective film over the surface. Friction modifiers have a polar head and a nonpolar tail. Polar heads attach to metal while tails attach to oils. Friction modifiers are used in brake pads, piston rings, bearings, gears, and other parts made of metal. The friction modifier helps prevent wear and tear on these parts.

    Friction modifiers are used to reduce friction in engines. These additives are added to oil to help prevent wear. The additives are made up of phosphorus and nitrogen compounds. Friction modifiers are also known as antiwear agents because they help protect metal parts from wearing out.

    51% of lubrication professionals use additives in lubricant.


    Additive friction modifier: Modern use

    Lubricants with friction modifiers reduce friction and increase efficiency. These additives will be used to create thinner boundary layers. This means there will be more parts operating under thin boundary lubrication conditions, creating more wear and lower efficiency.

    You can add AFM to your transmission fluid to improve its performance. The additive will also help extend the life of your transmission system.

    The additive is usually added to the transmission oil during manufacturing. It’s important to use an additive with the correct viscosity for your application. If you don’t have enough additive, it won’t work properly. You may need to change the amount of additive added to your transmission fluid depending on how much your vehicle travels each year.

    If you’re unsure about what type of additive to use, ask your local dealer. They’ll be able to tell you which one would best suit your needs.

    It doesn’t mean that the fluid won’t get worn off at some point; just that it’ll be slower than if there were no friction modifiers present. Different vehicles use different types of transmission fluids; therefore, manufacturers may specify which type of ATF is suitable for their particular vehicle. Typically, the car’s owner’s manual will include specifications for the fuel tank (or tanks). These may be different than the ones listed here.


    Q: How do I know if my transmission needs service?

    A: Transmission problems can occur at any time, but they often happen when the car has been driven hard. In other words, if you drive your car regularly, you might not notice any issues until it breaks down.

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