I was on the highway tonight and when I reached about 70mph my RPM's dropped down to 3k and when I pushed the gas i had nothing. Normally I would have that passing gear. Lately my temp gauge has been going crazy and my engine has not being warming to operating temp. I also just changed the fuel filter and cleaned the TB and IAC sensor. IDK if the thermostat is somehow linked to when the tranny changes or what. If someone could help me with this it would be great thanks...