Have been reading about a new Cummins thermostst for our trucks but have not been able to find a thread with the part number for it. It is supposed to limit the temp flucuation. Mine is currently stuck open and I would like to replace it.
Anyone have the part number?

 

Cummins P/N 3934373 eliminates temperature fluctuation but engine warmup is slower and the operating temperature is lower than with the standard 3928499.
I don't like the "improved" stat, temp stays at about 150 without a load, heater barely works in the winter here.