Mercon represents a series of technical standards for automatic transmission fluid, developed and trademarked by Ford Motor Company.

This designation serves as a mark of quality that Ford has established for fluids used in automatic transmissions.

These companies are authorized to produce the fluid according to Ford's specifications and market it under their own brand names.

The specifications outlined under the Mercon label cover various aspects such as viscosity, friction characteristics, and thermal stability, which are essential for the transmission fluid to perform under a wide range of operating conditions.

This careful regulation ensures that all licensed Mercon fluids provide consistent quality and performance, giving consumers confidence in their use of aftermarket products.

In 1942, The Mercury 8 and Lincoln offered cars with an optional "Liquamatic Drive" using a fluid coupling, conventional clutch, and semi-automatic three-speed transmission.

[1] In April 1949, Lincoln began offering the General Motors Hydra-Matic 4-speed automatic transmission in their 1950 model year vehicles.

This fluid specification change provided better oxidation control, anti-wear performance, and higher static capacity capabilities were also included.

[3] This fluid provided a high static coefficient of friction which resulted in harsh shifting.

The 1974 Ford Car Shop Manual reads "The automatic transmission is filled at the factory with "lifetime" fluid.

This fluid provided smoother shifting and less gear noise by with higher dynamic friction characteristics.

(See the Aftermarket Automatic Transmission Fluids section below) This fluid was first used in the following transmissions: As a result of the 1973 OPEC Oil Embargo and fuel shortages, the U.S. government created the Corporate Average Fuel Economy (CAFE) regulations in 1975.

The automotive industry responded by changing to three typically unused transmission technologies: The introduction of the TCC led to customer complaints of a shudder while driving.

All vehicle manufacturers made changes to their ATF specifications and the controls of their TCC to try and alleviate the problem.

The Type-H fluid specification provided improved friction characteristics in lock-up torque converters (reducing shudder during application and release).

Mercon ULV is composed of a Group 3+ Base oil and additives needed for the proper operation of the 2017 and above Ford 10R80 and the GM 10L90 10-Speed rear wheel drive automatic transmission.

NOTICE: The quart containers of Mercon ULV must be shaken to stir up the additives before pouring.

The 1974 Ford Car Shop Manual reads "The automatic transmission is filled at the factory with "lifetime" fluid.

Therefore, higher quality transmission fluids can last a long time in normal driving conditions (Typically 100,000 miles (160,000 km) or more).

Always consult the vehicle maintenance guide for the proper service interval for the fluid in your transmission and your driving conditions.