Interesting Characteristics about the Gear Ratio Change and Stock ECM & TCM settings : the SSR did not seem to respond like a non-computer controlled Vehicle does. It seems that the ECM and TCM "compensated" for the Wheel and Driveshaft Speed Changes. Only the Speedometer was NOT calibrated and it read approx. 22% Faster that Actual Vehicle Speed.
I have 456 gears also and speedo is still off. Bought the superchips flasher and the tune was good but the speedometer was off 20% and no help from Superchips, after 8 calls. Then went and bought the HPTUNER and with the help of Joe, and after about 6 diffrent tune's he got it at about 5% off now. Its the BCM that wont take the setting, the ECM reads ok and matchs the GPS speeds, when Joe runs scan. But the performance of the 456 gear ratio is the only way to go. It feel's like the SSR is a 1,000 lbs lighter even with my fat butt at the wheel, and a whole lot more fun to drive. But it can wake you in the rain real fast though, it can get loose easy when it's wet out but even that's fun too.
