Ford C6 "R" Superior Super Servo Assembly This Super Servo from Superior will improve all C6 Transmissions. This Problem Solver deals with these problems: Sluggish performance when positive shift is demanded, poor 1-2 shift & poor 2-3 shift. The Superior C6-R Super Servo performs as the Ford "R" servo. Due to the apply-to-release ratio, this servo delivers the best overall shift feel and timing of any servo combination. The Superior C6-R Super Servo delivers positive 1-2 and 2-3 shifts. This Super Servo delivers a clean 3-2 kick down. The unique design 2nd apply area uses a lip seal instead of an O-ring for better static release into 3rd.