Mustang 2009 pressure ,firmness

[fahadss2000]

Hi all,
Any one can tell me how to change or increase trans pressure and what is the maximam pressure and what about the firmness ...
Also I try to change the gear ratio to 3.73 but I can't maybe I go to wrong place !!
Thank you ,

[fahadss2000]

maybe I'm asking the wrong people

[witchertorque]

http://www.hptuners.com/forum/showth...ing-on-an-Auto