What is this hose for?

I can't see where it connects to the top of the transmission. This isn't something
from factory so someone add this on. I would guess this is a vent hose for the transmission. Every automatic transmission has some sort of vent or vent hose so it might not be an issue to leave it.
If you could show the other side of this hose I could give you a more definitive answer.

Hi,

That is a transmission breather hose. It should have a one-way valve at the end and not the 90-degree connector.

I attached a picture below of the part.

Let me know if this helps.

Joe

See pic below.

No problem whatsoever. It looks like someone used a ziptie to hold it in place as well.

Take care,

Joe