I got a response from AEV. Due to the superlift knuckles the steering angle (direction of the tires) is different for the same change in steering wheel degrees. So as you turn the steering wheel the same amount, the turning radius of the vehicle changes before/after the lift. Because of this, the computer sees a different wheel speed differential than it expects and that's what causes issues. The EGR calibrates this.

I'm waiting to hear back about how they recommend using the module in conjunction with programmers.