As I posted a while back, my '98 24 v. CTD shows oil pressure much of the time as soon as the ignition is turned on. I went to a local Cummins' dealer (shop) and tried to buy a replacement oil pressure sender (sensor) #3408428. I was told that number had been superceded and after the parts man called Cummin's in another city, I was told I needed part 4076930 and 3164755. I bought the parts and got home to find that the "parts" were an oil pressure switch and a short wiring harness. This converts the sensor to an oil pressure switch and requires flashing the ECM and hooking the harness to the Deutsch OEM connector and capping the old harness connector. It then says if the "parts" are correctly installed the oil pressure will show 55 psi + or - 1psi. on the "INSITE" computer. This sounds like it turns the oil pressure gauge into a dummy gauge. I got a PM earlier from another member who said he replaced his sender with p/n 4921511( they couldn't find this number) and it was a simple R & R. Does anyone have a current part number for a straight swap of the oil pressure sender? Thanks everyone.