Thanks for all the replies. I called a local 5 star Dodge dealership in Houston to find a little more information, and I believe the service manager there should be demoted as he told me as long as the coolant color is the same, I can mix any type of coolant.

I'm not going by that. The front of the Zerex coolant bottle reads that it is specifically formulated for Chrysler vehicles so I'm going to mix that with distilled water into the factory Mopar coolant. The Mopar coolant is reddish and the Zerex fluid is clear. I should be fine.

I only have 25,000 miles on this 05 Ram (quad cab). I'm going to look into getting the differential fluid changed. Thanks!