Just to add my 2 cents worth. We are on our 4th Avalon plus a Lexus 400, they have all had switches for ECON, NORMAL, AND SPORT, or some variation of these. These change the RPM range of the shift points . If you are having problems with deceleration shifting or resuming speed from a slow down, why aren't people changing the switch from one to the other until they are satisfied with a different RPM range in each gear, both up and down. It worked on 97 Lexus with the 4 speed auto, on the 1996 Avalon 4 speed automatic, the 2005 Avalon Touring 5 speed, the 2014 Avalon Touring 6 speed automatic, and it works on the 2019 Avalon Limited 8 speed we now have. I've been in the Automotive and heavy duty OEM for 50 years, so I first hand knowledge of the technology built into these transmissions for this purpose. Good luck to all