What I mean is that with the 7.3 I would have the pedal to the floor going up a hill pulling a heavy load, and when the rpm came down to below 2000 rpm, I would down shift, and still keep the pedal to the floor, and when the rpms droped down to 2000 again I would down shift again. This is very hard on a turbo engine, but the 7.3 held together. I did not know what the egt's were, but they must have been very high. The 7.3 is a 1993 IDI engine which has very little horsepower, and if you did not keep the pedal to the floor, you might go backwards. With the 2006 PSD 6.0 engine, I would not want to abuse it as much. Maybe 3/4 throttle until the rpm's came down to 2000 and then down shift.
I talked to a guy at DPPI who was very nice and helpful. He suggested a pyro gauge, of which I will get. That should end the potential problem.
I called Ford and they said as long as the pyro senser is installed after the turbo on the down pipe, it would not void the warrentee. If I installed it before the turbo, and the turbo went out, I would be buying a new turbo.