GM 700-R4 4L60 & 4L60E Billet Super Servo 1-2 Apply Piston Kit This Super Servo 1-2 Apply Piston Kit from Superior will improve all 700-R4, 4L60 & 4L60E Transmissions. This Problem Solver deals with these problems: Sluggish performance when positive shift is demanded & lack of holding power in 2nd gear. This Super Servo was Voted as one of Transmission Digest's "10" Best Products for 1997! This Super Servo has the largest apply area available for the 700-R4, 35 percent more apply area than the Corvette servo, providers super positive 1-2 shift, a quicker servo release on the 4-3 downshift, positive 3-2 kick down, and an adjustable pin tip is included to set perfect band clearance. This is great for heavy service, towing, racing and off-road applications for 700-R4 and 4L60E transmissions. The kit contains two-piece 6061-T6 billet aluminum piston set with three piece steel washer set, servo clip, servo pin extender, custom return spring and four piece Teflon sealing ring and O-ring set.