When I first got my car, it was constantly slipping. Once it slipped so bad the gear selector was on "D" and while I was driving like 35 mph it cut right out to neutral and i had ZERO throttle, just free revving whilst traffic was honking me from behind, they thought i was trying to show or something? Changed tranny fluid and that fixed the problem. Now, my gear selector lever feels like it is like getting loose or something, it doesn't feel as solid and i am afraid that it will move up and down the lever by itself while i am driving!! lol