My uncle has a 2002 Chevy Tracker 4x4 with an auto trans. When you put it in drive it takes off in high gear(third) and never shifts until OD. You can manually shift it to low then to second then to drive and all works fine. It just won't start off in the correct gear if you put it in drive to start with as normal. The trans doesn't slip at all. Can anyone help point him in the right direction. The trans has a tag on the side that stamped AISAN 03-72LE. Thanks in advance Kid...