Hello, I am currently diagnosing a transmission high pressure problem. Model ZF BW255P. The boat is a 2000 55' Hatteras sportfish. Engines are 3412E . The transmission normal in gear psi is 240. The port transmission is creeping up to above 420+ and has to be pulled back to reduce pressure. Temperatures are and remain normal. There are mechanical pressure guages that are reading the same to rule out a gauge issue. We changed the oil and inspected the metal filter screen. Both were clean. We have had a diagnosis of a possible bad pressure valve body. Any other input would be appreciated. Kindest regards, Capt. Garret
Pressure regulator is my first swag. You may have typed it pressure valve. New model number is ZF 2550 This issue before you serviced the clutch?? From the user guide;
