Abstract: A fluid pressure control for a transmission having a fluid pressure operated clutch includes a pressure regulating piston communicating with a pressurized fluid source for affording fluid pressure to the clutch; a load piston disposed in a common bore with the pressure regulating piston wherein the pistons are reciprocally disposed in such common bore and are biased away from one another by an associated spring; and a signal pressure chamber is formed between an end of the bore and an end wall of the load piston and communicates with a fluid passage running from the pressurized fluid source to the clutch. Concaved fluid communication grooves are provided in a sliding face of the load piston wherein a first groove communicates with the signal pressure chamber, a second groove communicates with a discharge port and a third groove communicates with the pressurized fluid source via a timing orifice.