Correct fluid usage Archives - Transmission Digest
Automatic-Transmission Fluid: What is today’s reality?

Long gone are the simpler times of having just one or two types of transmission fluid. Throughout the 1950s, ’60s and early ’70s, there were basically GM type A or type A “suffix A” and Ford type F. Because of a changing environment, such as increasing engine/transmission temps as well as a fluid-component issue (remember the ban on sperm-whale oil), fluid started to evolve.