Keeping your big, bad 6.0L Powerstroke's transmission temperatures down is absolutely key in order to preserve your Super Duty's longevity and maximize its towing and hauling performance. Aftermarket transmission coolers for the 2004-2007 F250 & F350 6.0Ls represent one of the most effective ways of getting your Super Duty truck's transmission temperatures down no matter what you're doing with your truck. Ford Super Duty Fitments: 2004, 2005, 2006, 2007 Ford F250 & F350 6.0L Submodel Fitments: FX4, King Ranch, Platinum, Lariat, XLT, XL Some Exceptions apply, please see individual product pages for specific fitments.