until the clutch piston contacts and compresses a multi disc clutch pack 82 prior to initiating a shift referred to as the shift cycle the charging circuit 58 is in the charged state as illustrated in fig4 the charging accumulator reservoir 70 reserves pressurized fluid to be used in charging the clutch circuit 60 upon initiation of the shift cycle when the shift cycle is initiated as shown in fig5 the shift valve 62 is actuated to provide a flow path from the charging circuit 58 to the clutch circuit 60 opening the shift valve 62 releases the stored volume of pressurized fluid in the fluid reservoir 70 of the charging accumulator 54 this released fluid flow allows unrestricted flow and reduces the delay time due to its location downstream of the feed orifice 74 the pressurized fluid feed line 72 supplies pressurized flow through feed orifice 74 where the combined flow from the feed orifice 74 and the charging accumulator 54 causes the clutch 52 to stroke rapidly until the pressure at the shift valve 62 and charging accumulator are equalized the one way check valve 76 prevents scavenging of fluid by the charging accumulator 54 instead flow is directed only to the clutch circuit 60 after completely stroking the clutch piston 78 signaling the start of the shift phase.