4am this morning I reversed ok out of the drive but when I shifted to drive I had no acceleration until I went flat to the floor, then I got very minor movement. Tried again got same result, pushed through it and the drive kicked in and it’s been fine all day - 8 hours straight driving, all conditions, wet, dry, traffic stops starts freeway runs. It felt like the transmission was just on the drive side of neutral. It didn’t rev high to move. Car’s just been through 170,000km service. Replaced a front wheel bearing and other side front drive shaft seal. All good. Engine great. It’s never had a transmission service due to owner (me) not knowing about that. Any ideas?