Automatic transmission what other types of transmission I can use

Not sure what you are asking. Generally, there is an automatic transmission and a manual transmission that can be put is a Mustang. Changing from Automatic to manual can be an expensive adventure as you will need to replace the pedals (to add the clutch pedal), install a shifter, change trans mounts and will require a different wiring harness and possibly a new computer. This can be very expensive if you are paying a garage to do it. If you really want a manual transmission, trade the car. It will save you a lot of money and headaches.