2005 1 ton Ram diesel

Thanks to all of you for your wonderful replies & advice. I will feel more confident on grades with the exhaust brake installed. I was mainly asking for advice if the truck was worth that expense because it is 14 years old now. My husband kept it up beautifully. It runs great, so I'll just keep my big red beast, & put the exhaust brake on it. It did great pulling the trailer. I barely felt the trailer back there, but I always felt a little nervous mountain driving worrying about being able to slow down on a decline without overheating the brakes. I plan to travel in the west again this summer, & don't want to feel that tension since it's just me & my two dogs. I could do a lot of repairs, if needed for the price of a new truck.