I'm running a 2002 excursion and will be pulling a TT for the first time this spring(27' 6k). I just want to be on top of things when it comes to temps. If trans temps get too high I will have to do a cooler mod. If Egt's get up there I can dump the stock exhaust and go with a 4". I am looking for some general info on how hot is too hot and what is okay for how long? Example: if pulling for over a half mile up a grade and the egt's get up to 1250 should I get out of it or is 1250 okay for a half mile? What should I expect on a dead start to highway speed? I'm looking for some temps to guage things by before I do any mods. Any help appreciated.