It was recommended to purchase three gauges: pyrometer, turbo boost, & trans. oil temp gauge on my '07 Dodge Ram 2500 w/68 Re. I use the truck to haul our trailer up steep mtns. here on the West coast & plan to travel x-country. What do each of them measure & what are the safe readings on each of the dials? New to the diesel world & love the truck. 
frank

frank