Well, I dont have any clue what this may be, but hopefully you guys can help me. I have an 03 CTD 2500 that runs great, except whenever the A/C or the Windshield Defrost is on, and I am driving, the transmission skips around, especially when cruising at 55-60 mph, it feels like it will jump out of gear, and rev, then will jump back into OD, or it willjust downshift to third and run for a few seconds then shift back into OD. Hopefully you guys can help me out, I took it back to the place I bought it, and they went through the transmission and replaced all the solenoids, but it is still acting up. Thankyou for any help you guys can give. I just bought this truck recently, and found this site looking for help.

Matt

 

Get new batteries.