Drive it again. Not just in 1st and reverse. Pay attention to speed not just gear selection. Double check lugnut torque. You might have a wheel coming loose. Ive seen loose wheels do all kind of weird stuff. Jack up each wheel atad to ease the weight on it, but dont totally take it off da ground. Then torque it to spec in a criss cross pattern. I dont think its trans related from what u said, but not sure?? Let us know...…...
