[jgrahamc]

As immortalised in the 1978 song "Greased Ligthnin'" from the film Grease:

    Well, this car is automatic
    It's systematic
    It's hydromatic
    Why it's greased lightnin' (greased lightnin')

I am pretty sure that "hydromatic" there is actually "Hydramatic" (https://en.wikipedia.org/wiki/Hydramatic).

[ZeroGravitas]

1978 film (based on a 1971 musical) set in 1958 with the high school kids repairing a beaten up 1948 model year car.

[donw]

If it’s a hydramatic, be careful to only lubricate it with snake oil.