Well I have been fighting a over heat problem. I had bought a Tranny temp gage and the drain plug on my 454 is the same size as the adaptor for the sender so I also wired it up. What's normal oil temp? I hope to god this gage is inacurate because I was running 300 degrees of oil temp on my way to work if it was acurate. I felt the cooler lines and 300degrees should have blistered me an that cooler was no where near 300. it was warm but it leads me to wonder if thermostat deal is not working for the oil bypass. I have read that it does not circualte to the cooler till the oil hits 180. That's fine and I understand why, I would like to see this thing stay around 250 max. They want over 200 regularly to cause any moisture in the oil to become vapor and exit the crank case via the PCV.