The vacuum module (although FastLane has it cheaper) was billed to me by my mechanic at $47.99. I was charged one hour of labor at $62.00 and $14.00 for the MB trans additive for non-slip. As the non-slip additive gets worked into the trans, it is becoming smoother and less violent on the upshifts. The greatest difference now is when I engage the kickdown switch and floor it, the shifts are crisp and clean. It's a lot of fun
One thing is very clear, the flaring is gone.