QUESTION: We have a 2000 Ford F-350 with well over 400,000 miles. It has a standard transmission with a Masport pump. You have to push in the clutch, flip the switch, and then the pump engages as you let out the clutch. Now, if you let out the clutch, it sounds like the pump disengages and it makes a grinding noise. You have to quickly put the clutch back in and then let out again until it engages. Sometimes it will do this two to three times before the pump actually stays running. We have already changed out the clutch
