Checking Fluid Level
WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 1983 Mercury Zephyr, 1983 Mercury Marquis, 1983 Mercury Lynx, 1983 Mercury LN7, and 1983 Mercury Cougar. However, it is still accessible from the selected car via links, so may be relevant.
Check lubricant level at filler plug hole on side of transmission. Lubricant should be level with bottom of filler plug hole. Add lubricant as necessary to bring to correct level.