My 2002 Corvette transmission started slipping only after 48k miles. searched around for a shop that new what they were doing with GM and corvette transmissions, and found Circle D. Glenn the technician was very helpful through the whole process explaining what had gone wrong. The rebuilt the tranny with better aftermarket parts and I'm happy with the results. In addition, it only took 4 days. I recommend Circle D for your performance transmission needs.