Complex sentence: A gerotor pump senses any speed difference between the front and rear output shafts and, when the shafts are turning at different speeds, it supplies oil pressure to a wet clutch pack.
Split into simpler sentences: A gerotor pump is connected between the front and rear output shafts to sense any speed difference between them. When the shafts are turning at different speeds, the pump supplies oil under pressure to a wet clutch pack.