i have a 2006 ranger. recently when driving it feels like the transmission is slipping. all fluids are good, no lights come on on the dash. it does not do it all the time. it may do it 2-3 times in a row then maybe wont do it for a week. called the ford dealer and he said something about the ABS. any suggestions would be greatly appreciated. it only has 37,8?? miles on it