Since you asked..... Feeling funny while driving is pretty general statement, but feels like it's on ice makes me want to look at things more in depth. Since you wiggled everything front and rear like control arm and mounts, front suspension, etc. How about the axle shafts when you had them open? Like rotating a paint mixing stick in a bucket. No binding or excess play? Driveshafts removed and rotated for feel? If your truck drives better in rain, then it is more related to Alignment due to less scub in rain. Lastly, your front axle IB bearing seizing momentarily will give you that exact feeling.
Good Luck and keep us updated. We're all watching.