having problems with 2016 tacoma v6 six speed auto.Vehicle surges while parking and slow speed maneu

Having problem with 2016 Tacoma v6 six speed auto.vehicle surges while parking and maneuvering at slow speed.500rpm-1100 and back down to700. Hesitant to accelerate at highway speed and sudden acceleration while on cruise control at 75 mph.Sudden increase from 2000rpm to 3500 with increase in speed.Back to dealer two times.first time found O.K .Second time after having vehicle for seven days and gone over by Toyota super techs a conclusion was reached.An ' inherent characteristic' of the vehicle was their answer.Service mgr. and tech seem to think my problem lies in the software.Update and or parts on order.Up to six weeks to wait.Should know more tomorrow when I chat with public relations mgr. Any input???

 

Hmmm..that sucks! Keep us posted..Hope it works out!

 

Did they check the trans fluid manually?