If it's an auto through dipstick tube. Check level when running.
most cars you have to add the transmission fluid through the dipstick hole leading into the transmission its self
You add fluid at the exact same place you check the fluid level. Warning: Use only Honda fluid, and use no substitute.
An 89 Cutlass Ciera holds 7.4 quarts of transmission fluid. When servicing the vehicle, a portion of the fluid remains in the transmission and will not be added back.
Dextron 3
You could try changing the transmission filter and the fluid.
Take out the dipstick, put a funnel in the tube and slowly pour tranny fluid in. Replace stick, drive to warm, check level, repeat as necessary.
Drain it and change it!
It is installed in the same tube you use to check the fluid. Do not overfill!
5 quarts
it needs Nissanmatic C fuid for 89-94
Sounds like the tranny. Check the transmission fluid level and the color of the fluid.
3 to 4 quarts