If the transmission was designed to be the primary force in slowing the car it would be gigantic like ones found in big trucks. There's a reason your car has brakes man, use them.
Use the
drivetrain togo, the
BRAKES to slow.
Why coming into a 90* turn so hot anyway? You've got to almost stop to take the corner, use more brake coming off the highway to scrub speed off and downshift only when your speed matches the lower gear.
Everything Porsche said is dead on.. follow it and you'll have a much more pleasant experience as well as a car that lives to tell the tale.
