Cheap insurance. Can't argue with that.

We are probably fairly close in age. I turned 60 this year. (early.... this year.... )

 

It's not a flaw, the liquid to liquid heat exchanger in the radiator is far more efficient at transferring heat than an air to liquid cooler. If you bypass it you will need a much larger auxiliary cooler to keep the transmission cool, also it is on the cold side of the radiator which runs 75-100 degrees cooler than the engine operating temp, and it doesn't even get much flow at all until the engine is up to operating temp and the thermostat opens so it almost never heats the fluid like some people think it does.

 

That's a valid point. Trans fluid warms up MUCH faster the engine coolant.

 

It is a support truck lol, nothing says I cant dive into it though. i want to learn how to tune a gasser, this truck should be a good one to do it on. If I can get mpg's up to 20+ then maybe it stays longer.

The cold side of the radiator is going to be running at 190~200* otherwise the t-stat would never open.

 

The thermostat opens at the operating temp of the engine not the radiator, if the cold side of the radiator ran that hot then your engine would be overheating, because the fluid isn't getting cooled.

 

That was a test... lol good job