So the sensor did not fix the issue. The lift still is having issues with the backward tilt function. Once the forks are all the way forward, after sitting for a moment, the backward tilt function doesn't work, even with continually holding the lever back. After returning the lever to neutral and trying again, the forks move backward a little, stop, and then move backward again. A few times I have had to move the lever back and forth and then the forks/mast assy will catch and slam back. I am thinking that there is an issue inside the oil control valve body for the backward tilt function. Any thoughts?