No power when cold
New to the diesel world, have had this 2500 Ram since Nov and so the first winter with it.....not used to the noises and other diesel quirks having driven gassers for the last 30 years. Truck was well maintained and have the service records.
It was -20 C out today and I forgot to plug in my Cummins truck but it still started right up, set the high idol from the cruise control and let it run in neutral (automatic) for about 4 minutes, then gently out the driveway. There is a steep hill that runs for 300 yards just as I exit the driveway and I didn't think the truck would get to the top. Didn't seem to have any power, tach at about 1400 pretty steady even if I pushed on the pedal so I don't think it was tranny slip, lots of white smoke but again its -20 C . When I got to the top of the hill I stopped before turning onto the next street which was dead level. The truck seemed to accelerate fine to 30 mph (speed limit), still some smoke but not near as much. Drove for 15 minutes, shut it off and came back to it an hour later and it started and ran up to speed without any issues, still a little white smoke but all of the vehicles around me were smoking due to the cold.
A few days ago the temp was -2 C and the truck ran up the same hill without any fuss. Does the hill problem seem to be just a really cold tranny with thick fluid? Truck is stock, Howe's additive in the fuel tank for the winter, tranny fluid changed 10 000 miles ago and Rotella 15W40, Baldwin oil and fuel filters and a Napa Gold air filter all new 2000 miles ago.
2006 2500 QC 4x4 Auto Smarty Jr