Adaptive Equipment problems of the 2006 Nissan Maxima

My 2006 Nissan Maxima has been feeling weird for some weeks now. Every time it was taken to the mechanic shop they were never ever able to pinpoint the issue. After having spent hundreds of dollars on a new valve body, transmission flush, etc. The issue now seems to be the transmission! my transmission is completely out! I am very disappointed that I have spent $21,000+ on this car to get nothing but dept out of it! after almost getting into multiple accidents from the sudden jerking of the transmission, I can say I will never purchase another Nissan vehicle again!!!!! I wish I would have done research on this vehicle sooner so that I could have traded it in before it was too late. My mother who also purchased a Nissan (quest) is beginning to have the same problems. We are very disappointed with the company. The least Nissan could do it repair the damage for all the the customers that are going through the same issue!.