Hi, My truck is a 2000 Ram 1500 Quad cab 4x4.I have 90,000 miles on it and plan to keep it.The fluid is not discoloured but I was thinking of changing the fluid since it has never been done that I know of since I bought it used.I hear different responses from people,"if its running good leave it alone"I plan to keep the truck for a long time since I only put 2,000 miles a year on it since I use it for Hunting and fishing only.Any advice would be greatly appreciated.