I've been using Amsoil synthetic trans fluid in my race car (SuperShift) and in my 2004 Dodge dually (Multi-Vehicle) for many years with no issues. My trans guy says to keep using whatever fluid I have in my race car because everything looks so good when I bring it it for a freshening-up and my Dodge Ram 3500 has over 112,000 miles, almost all towing my race car & trailer in the Florida heat and up & down some east coast mountains when I travel up north. The extra protection gives me peace-of-mind.