I got my truck back on monday, and the FCA has been replaced, and it appears all is well. It even idles better........

 

take an oil sample ant cummins dealer can supply you a oil sample

 

The last two times my truck starts to idle rough I've changed the fuel filter and it stopped the problem. If someone told me that I'd think that was BS, but for me it is the case.

I qouted this response because I've got this vibration at idle. I've been under the truck looking for a loose heat sheild or somthing like that. The other day a was thinking it might be a bad flex plate, and then I see this. Has anyone else ever had a metallic viabration or had torque converter bolts come loose? Should I let the dealer look at it.