Thanks for the reply Mark. No, 1 & 2 don't work either, only reverse. I was hopeful after refilling the pan and watching the PTO tach while shifting thru all the gears for five minutes trying to circulate the fluid before trying to move the truck. The tach gained about 50 rpm on every shift to a gear which made it feel like the gears were catching, but I figured out that it was only the computor reacting to the shift commands. Odd critters, these 4r100s. If something is going to break I want it to make some noise first and declare it's intentions.