i have a 04 maxima and its starting to have the known tranny bang efect,the whole 1st into 2nd gear bang then from park to drive. so i ask to my fellow maximas family i hear its the valve body, i live in rhode island i hear transgo shift kit then i hear the level 10 kit is good i went to the dealership and they soo called told me it has something to do with my tranny something inside ? it would cost 1300 but they said it wouldn't fix the issue i nd help