OD light flashes, shifts hard like twice and then the SES light comes on. The OD light stops flashing. This is intermittant, as the SES light eventually goes out for a while, may be a day or two and the cycle begins again, although sometimes the flashing OD light and hard shift may happen a few times before the SES light goes out. Code P0720, replaced output shaft speed sensor and the turbo shaft output sensor. It happened again. What should I try next? I had the PCM replaced about a year ago.