I have a 2016 Pilot EX AWD. Did not come with factory tow package and the manual indicated it was necessary to install the extra cooling fins if I want to increase my towing capacity to 5000lbs. I have a 4000lb travel trailer. My mechanic indicated I didn’t need to install if I just replace the tranny fluid more frequently. I’d prefer not to bother with the cost and the install but don‘t want to burn out the tranny. Anyone have any experience or insight into this? I’ve always trusted my mechanic but want to get another opinion.