In 1959, Ford began releasing their own automatic transmission fluid specifications, see MERCON for more information. From 1958-1968 many vehicle manufacturers continued to use the next GM automatic transmission fluid specification, the Type "A" Suffix "A" fluid in their transmissions. In 1966, Chrysler began releasing their own automatic transmission fluid specifications, see Mopar ATF for more information. GM ATF was the same color as engine oil through 1967. Aftermarket ATF was available with red dye as an aid in fluid leak detection. Dexron (B) was the first GM ATF to require red dye.