Phantom_h60
Member
I took the RAM in for the P0731 code (improper ratio). They couldn't duplicate the shift issue that set off the CEL. The truck did vibrate from time to time on light acceleration like it was in too high of a gear. They updated the pcm per TSB 18 022 21 and performed a quick learn. They also checked the transmission fluid and took a sample. They drove it 12 miles and nothing popped up. So far so good but I haven't put many miles on it since the update. Seems fine.
