I wouldn't do it, but anything is possible. There are about 50 million parts that have to go together in the correct manner. Adjustments and testing has to take place before you take the time and effort to put it back into your car for it to work properly. My suggestion is that you take it to a quality transmission shop and get a guarantee. That will save you a lot of work and headaches, but if you are adventurous, go ahead and try it yourself.