Convex

I have an SCT X3 tuner I got from BAMA and I had my gears switched out awhile back.. I have checked my speed with an iPhone 4 app which tells me 65mph is 2500 rpm (auto) and my speed shows 85mph @ real 65mph.. BAMA has wrote me tunes for the gear change but it did notting for me as it will not change it.

I have gone in and changed gear ratio in the tuner but still notting.. whats next the tire size ratio ? it has 245/45/ZR17 tires so what would be the correct tire ratio for the tuner?

I am trying to do this myself as a local dyno shop wants $140 to correct it plus tune.

Thanks.