Hello everyone, new to this forum and to our regal gs. Bought my wife our 12 gs auto a few months back and so far we love it. I am the owner of a small diesel repair shop in rural nebraska, but previously worked at a chevrolet dealership for several years. Our new gs is surprisingly pretty quick for a 2.0, but as i'm spoiled and used to the power of a duramax, it lacks some top end pull. I have currently started building an efilive tune for it but have not installed yet as i'm still researching some e85 possibilities. Does anyone really know how much these trannys will take? If anyone has any knowledge or experience on these cars i'd love input. Thanks