Trans shifting!

Does anyone's trans seem like it down shifts to low if you are turning a corner,it does not do it driving straight.I thought this was weired so I called the dealer and they told me that if I had the didn't have the differential button pushed in that it probably was trying to put power to the other wheel.Well I have tried it either way and it still does it,a couple of weeks ago I notice trans fluid in the drive way so I take it to the dealer and they tell me I have a leaky drive shaft.They put a new one on and top off all the fluids and tell me that shouldnt happen anymore but it still does!!!!!!!!!!!!Any ideas???

 

Before everyone jumps you, do a search on transmission shifting, or just start going back through the pages of threads. Its a common thing, heavily talked about. the more you search and read the more you'll find out.
Mine did the same thing but here 8000 miles later it seems to be working fine, dealer states the computer has to learn your driving style.

 

Thanks I will!!!!!