Been trying to find information on replacing a TCM for a 2003 jeep liberty sport 3.7 4x4 but cant find anything. I took it to aamco and they said i need a new one and want to charge 900 for everything. Ive found some online for around 169 they will program to my vin. I want to make sure i do it right to get my vehicle working properly again but dont want to spend almost a grand to do it. Is it simple to replace yourself? and what would be a good deal?