So I have an 04 dodge 1500 with a 5.7 HEMI and I have air bags under the rear for load leveling I pull my 5th wheel camper with it and have some concern with not being able to see my trans temp besides a dummy gauge. I had a friend give me a puller gauge obviously trans temp is the first gauge but what other gauge do I need for pulling loads besides the stock cluster

 

Trans temp is definitely a plus. Anything else, just depends on how paranoid you are. Engine oil temp wouldn't be bad, but, everything else is already fairly well monitored.