my 2007 has started lunging when coming to a stopits like it shifts all the way down and then jumps into 2nd and lunges enough i have to hold down on brakes.It also makes a vibration sound once in a while when taking off.i replaced the torque convertor and flushed the trans about 5000 miles ago

 

i answered your other post. this is not normal. my tranny has always shifted funny when you was coming to a stop but not like what you are talking about.