We had a transmission fuild change, I stayed with the 15W40, my trans temp has always been normal so I didnt want to change anything. I used the Drain/fill and Drive method. Found the the NAPA 1551 Ext Tran Filter not right one. Got that corrected with the Fram PH3519A. Road tested and All was well. We learned a lot about each other this weekend. Its obvious these trucks respond well to the right stimulus. Maybe it was some jealousy on "Patricia's" part when someone I have never seen before drove by the house in threir A2 Blowing a hello out to us as we were working. I heard him round the corner (hard to miss the sound of a multifuel herc) and as he emerged from the trees that line the property, he steamed by blowing his horns.