I’m shocked by how bad the exhaust fumes are in the Land Cruiser. I’ve had 4 new vehicles at my current house in the garage. I open the garage door and start them up. On the other 3 never had an issue with exhaust fumes getting into the car or building up in the garage if I need to run back in the house for something. The Land Cruiser exhaust smells awful, builds up fast, and gets in the cabin quick. So yes, I’d be concerned with an axel dump too.It seems like dumping over the axle in an SUV is a bad idea? Increases the likelihood that exhaust gases may enter the vehicle? Not even sure if that setup is legal in some states.