I've got a 2004.5 LLY Duramax dually 2wd and the transmission decided to give out on me yesterday on the way home. I hadn't noticed anything out of the ordinary as far as driveability goes. A local shop had rebuilt and "upgraded" the transmission a couple of years ago. Not really believing that right now. But I'm not sure what I should upgrade in the transmission or what I should look to buy? I was getting ready to do a Danville 72 and injectors but it looks like the transmission had other plans. Any help or information would be appreciated
