I'm almost postive B&G can do 4.7's. but its a flash, I don't know of any programmers yet that will allow us to set our own shift points. Somebody on here was talking about hptuners.com was going to release somthing for us but it seamed like speculation
If you have done the Torque Management Mod already it won't shift any harder with the Superchips. With my OD on my tranny makes the 2-3 shift somewhere around 42-4500 rpm. If I leave my OD off the 2-3 shift is at 5400 along with the rest of the shifts. I have a flashed PCM coming soon so we will see if that changes things. I still don't think it's going to make that much of a difference without a shift kit though.
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