My 01 gtp down shifted hard a few months back in ann arbor, i ftove it a hour home manually shiftimg it. But has no gears in drive. But i have all gears when i manually shift it. I drive it around my block manually shifting it and its fine, it has me second guessing if it even is a garbage trans. Has anyone else had this happen. Im going to scan it tonight so see what codes it throws. Thanks