Sonnax Hi-Performance 2nd Gear Super Hold Servo + Accumulator Piston Kit *COMBO KIT* This is a Sonnax 2nd Gear Super Hold Servo + Accumulator Piston combination kit for Chrysler TorqueFlite A727 (36RH, 37RH) / A518 (46RH, 46RE) / A618 (47RH, 47RE, 48RE) RWD transmissions. When used with higher horsepower applications, this servo / accumulator piston kit reduces the need for aggressive lever ratios, excessively high line pressure and other more radical modifications in order to get firmer shifts. Our Servo + Accumulator Piston Kit Includes (1) Sonnax 2nd Gear Super Hold Servo Kit (Part # 22301B-01K) (1) Sonnax Accumulator Piston Kit (Part #: 22841-04K) This Sonnax 2nd gear servo offers 16% more apply area than the OE servo and is the largest and most leak-free servo available. Contents: Cover Piston Sleeve Pin Retaining Ring Seals/Seal Rings (5) O-Rings (3) Piston D-Ring Rubber,Small D-Ring Rubber, Large Scarf-Cut Seal PTFE, Small Scarf-Cut Seal PTFE, Large