Ok. My transmission finally went, symptoms where poping out of 1st gear when I pulled out and it wouldnt go into 3rd or 4th without griding. Took it to a place that rebuilt it before. I told them to call me when they found out what was wrong. They never called once. They were called and told to put in a white 23 tooth speedo. gear in the car as well. Today I find out the rebuild was $1400 because I broke the main input shaft. If this was broke would the car even drive? Please tell me. Also, they called a speedo place and asked for the white 23 tooth gear and they said NOT to put one in the car because they are thin and break, but every mustang with 4.10's and 3.73s has these gears in. This really pissed me off! Please I need help on what would happen if the main input shaft would break. I was going to complain tom to them, but they are closed