I am doing some research and asking around and getting conflicting opinions on this? I am wondering if any of you have any experiences.. I am planning to keep my truck for a long time. Would adding a performance chip affect the longevity of the engine/tranny. I am mainly thinking about doing this to get a few more mpg and also get a little bit more power in the process. If it is bad for the tranny or any other components of the vehicle is there anything that can be done to circumvent this? How much would it cost? Thanks for all the answers in advance!