Hey I’ve had this forester for a couple of months now bought it with 300k+ miles on it. Got some general maintenance done on it put about 1000 in the car. A month or two later my car started to make this thudding sound in 1st and 2nd for only a little while unless I accelerate up it goes away and isn’t an issue in other gears. Looked around the internet couldn’t find much besides it being maybe my output shaft, oil filter, or my axle. At its worst I can feel the thuds through my center console. Any ideas on what it could be?