As Dan inched our 6.7L F-350 onto the trailer, the October sun beat down onto the black asphalt. It wasn't even 11:00AM and the thermometer read almost 80°F; hot for October in Delaware, but perfect for transmission cooler testing. I climbed into our 6.0L F-250 follow vehicle while Dan cranked down the straps on the trailer and we set out for an afternoon filled with hills and valleys.
Our last look at the 6.4L Powerstroke transmission cooler revealed something a bit out of the ordinary for our blogs. Instead of highlighting all the failures of the stock transmission cooler, we shared that there really aren't many, yet. Yes, the stock 6.4L trans cooler is good enough. Good enough for a stock truck.