I did more digging into the rear heat ducting . On my TC the air flow on the right rear heat duct is not as good as the Drivers side. I am going to find out the cause, The parts diagram shoes them to feed off the same source. The left duct feeds warm air to the intake for the rear heater fan which feeds the vents on the door posts and the third seat vents .The location of the fan intake is forward of the heat duct outlet. this is a problem for the heat getting into the rear distribution fan and the booster heater. Working on a solution for this One more thing the air filter on the Rear heater fan is on the floor and will need to be changed often. The rear fan is still loud . The duct routing is the reason for the area around the shifter becoming very warm.