I just purchased a 98 4runner v6 auto that stalls if you do not manually shift the trans, if you start in 1st manually shift it to 2nd then drive its fine. When you are coming to a stop if you don't down shift it will stall as well. I had already planned on putting in a used trans but could this possibly be a simple fix? The cel is on but I haven't gotten the 4 runner home yet I also noticed the trans was overfilled obviously I will start there but do you guys have any ideas.