Abstract: Class II malocclusions are one of the most frequently encountered conditions in orthodontic faculty. Growing Class II malocclusions are treated by functional appliances when the component involved is mandibular retrognathism. Variety of functional appliances are used depending in the age of the patient , type of malocclusion , severity of malocclusion & patient compliance. The current case is of a 12 year old male patient with a Class II malocclusion due to mandibular retrognathism & a clockwise rotating mandible excessive overjet & overbite , convex profile The objective of the treatment was to correct sagittal discrepancy and also redirecting the growth vector from clockwise rotating to closing the mandible. The treatment was two phased with phase I in which a vertical activator was given which patient wore for 14months followed by phase II fixed mechanotherapy for stabilizing the occlusion which lasted for 12 months. The sagittal improvement was seen with mandibular growth stimulation and also the closure of mandibular plane was observed. Maxillary incisors showed slight retrusion with labial flaring of lower incisors. Significant improvement in overjet , overbite & profile was seen and the results were stable six months post retention.