Cummins ISM 500

[ARFFMAN]

I just bought a 2008 Newmar Essex with a Cummins ISM500 w/4000 Allison transmission Bringing it home (About 200 miles) the engine temperature, once warmed up stayed at 183 degrees. Every once in a while it may go to 182 degrees. The Allison heat ranged 145-170 degrees. Does this sound normal for the ISM 500?
I was expecting closer to 190-205. I was in Florida so pretty much level ground.
Max turbo PSI was 28.9. Didn't have anything to read HP. I was not towing.

[Vettesniper]

Your fine!
I just drove from Jacksonville to Melbourne on I-95 today. Your temps are exactly what I saw today. It was pretty cool today in Florida. It’ll run a little hotter when the weather warms back up.

[Jons]

Mine always runs 195 to 205 @ 67 MPH

[ARFFMAN]

What model and year are is your motor

[Jons]

Not sure which one your are talking to but mine is a 2007 Essex with ISM 500 HP built in late 2006