Runnin\' Hot ? Need Help! OK here's the deal. I've got a 87 350 fuel injected auto trans. After the thing starts up and I get to highway speed the temp gauge pegs! Almost to the red(!), I slow down (get off the gas) for about 30 seconds and the gauge goes back to normal. After I'm at highway speed, and I get on it, the temp gauge steadily climbs back to 240 or 250 ! I get off the gas, and in less than a minute, it's back to normal temp??? Note, I get no "Hot Smell" at this point. If I stay off the gas and just cruise the temp is normal. It will idle forever and not get hot. It sat for 13 months. I put a 6" lift and 35X15's on it right before the trouble started. Here's what I"ve done to try and fix the trouble. New thermostat, flushed old radiator, new temp sending unit, verified clutch fan is operating correctly, NEW radiator, hoses ect. Now I'm down to two things, bad gauge (which I'm leaning toward) or auto transmission running hot. Do I need a need new gauge or a transmission cooler?? I bought the rig new in 87, so it's my baby. Never had this problem before. 157,000 miles, Jacobs electronics ignition, K&N filter, Flowmaster Dual exhaust. I'm new to the site, go easy on me. But I know the answer is out there. Great site!! Rail Call me a pavement Pounder...........But I'm working hard to change!!!!!!!!!!