I have a 2004 Cummins with the Automatic tranny and when I go from 1st to 2nd it feels like I'm losing power. The truck chugs when I go from 1st to 2nd unless I'm on the throttle pretty good. I've talked to a couple other guys who have the same thing going on and they both have the 06. Any ideas on what this may be?

 

Do a search on it, lots of info and opinions out there...
Can "usually" be fixed with gov pressure sensor 12415C, gov pressure solenoid (Borg Warner) 12432A and keeping the front and reverse bands adjusted.

 

I have the same problem let me know if u find anything out please