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Message: <blockquote data-quote="Therock88" data-source="post: 2074176" data-attributes="member: 53689"><p>Hi...Yes, the TCM tune makes a huge difference with shifting.  Should have had those shift strategies from factory!  The ECU tunes make a very marked difference in performance as well...And I had a custom Goosetuned set for mine with 93 Octane and Water Methanol Injection.  It was very fast and ran great!.  I never really checked the gas mileage.</p></blockquote><p></p>