so I’ve got this issue on my 1996 a4 2.8L automatic I’ve been trying to diagnose for a while now. When first driving the car it will go up to about 30km/h and then feel like something is slipping and feels like there’s friction slowing the car down. Then when I go up a hill whatever causes that goes away and the car drives and shifts just fine until it’s turned off and then it does what it was doing prior. Anyone one have any idea what’s causing this? I’ve changed the fluid and filter and added an additive that’s supposed to help with gunk and all that bs but to no avail. Can someone help, has anyone else experience this?