DTC P0732- Incorrect second gear ratio

I am trying to find out exactly what my first steps should be in diagnosing where the problem might be. I have read lots of your reply's to other posting (which cracks me up I must say) and if I am understanding correctly I believe I would start with doing an air pressure test. I only have the code that comes up P9732 and my "R" works whenever it fells like it. My worry is about how hard it shifts into second and third gear. Some times I think it has fallen out cause of how hard it slams forward. (I know that it's very unlikely to ever happen lol). My coolant light is on and it does seem to be leaking coolant on the right side of motor. Still trying to figure out where that leak might be coming from. Any suggestions tho I would appreciate. Since you are the experts and seems like you know your stuff. Thank you very much for your time.