Good Morning, my 2009 CRV has 268,000 miles on it. It has been a great hard working vehicle. It gets regular service with synthetic oil. My mechanic has suggested that I get the Transmission Fluid changed/flushed. I have received conflicting advice about this and other maintenance suggested by shops. With the high mileage this car has, what do you suggest?? And is there anything other major maintenance I need to look at? Thank you so much for the advice.