Here's an interesting one. I just read JMHC's thread. Supposedly, the vehicle was overdue for an ATF flush. As a result of the worn-out ATF, it caused the vehicle to exhibit a "lack of responsiveness" and poor shift quality, both of which were cured by an ATF flush. My friend has a Corolla with 56k on the original T-IV. When I took it in for service last week, she mentioned that the shifts were clunky and the vehicle was displaying a "lack of responsiveness." She said that on the highway, the car felt slow to respond and "lacking in power." I drove the car and didn't notice anything unusual, aside from the rather clunky shifts. After reading JMHC's thread, perhaps a "lack of responsiveness" may truly exist? This is puzzling to me. Personally, I have never seen worn-out transmission fluid cause a vehicle to exhibit a "lack of responsiveness." Is this a normal symptom of worn-out ATF? Thanks.