NHTSA Complaint #11405970 — 2014 ACURA MDX

I HAD THIS 2014 ACURA MDX FOR 4YR SINCE 2016 AS CPO AT LOCAL ACURA DEALER. SINCE 2YRS AGO, MY RPM DO NOT CLIMB STEADY AND IT IS JUMPING UP AND DOWN ,ESPECIALLY AT THE SPEED BETWEEN 40 TO 60. I THOUGHT IT IS JUST TRANSMISSION FLUID ISSUE. ONCE I REPLACED TRANSMISSION FLUID REPLACED, LEVEL OF FLUCTUATION BECAME LESS THAN PREVIOUS. BUT AFTER COUPLE MONTH LATER, IT IS STILL SAME. I AM WONDERING THIS ISSUE IS KNOWN FOR ANY ACURA MDX OWNER MANUFACTURED IN SAME PERIOD. I THINK THIS COULD BE SOFTWARE ISSUE RATHER THAN MECHANICAL ISSUE AND SHOULD BE RECALLED TO BE REPAIRED OR UPDATED. PLEASE LET ME KNOW IF YOU HAVE ANY CLAIM SAME AS WHAT I AM EXPERIENCING. THANKS FOR YOUR TIME AND SINCERE SUPPORT.