First off let me say that I'm new to this and not very tech smart. I have an 04 3500 I just purchased a year ago. The previous owner has made a lot of modifications. It has a smarty jr programmer extra trans cooler and over size turbo just to mention a few. Recently as I'm driving it will kick into tow-haul and trans temp light will flash on. After research i tried setting program back to stock and unhook the programmer. When I can walk faster than my truck will run. Any ideas? Thanks
Hello
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