The 1997 Ford Ranger manual transmission fluid capacity depends on the specific transmission type. There's no single answer. You
must consult your owner's manual. The manual will specify the exact amount and the type of fluid required for your particular Ranger's transmission.
Failing that, checking the transmission's dipstick (if equipped) is the next best option. However, even with a dipstick, the owner's manual will provide the most accurate information about the correct amount to use.