2005 audi s4 transmission
 

Have a 2005 audi s4, transmission started having issues around 155k. Drove it anyway so i probably screwed it. Kindof acts like it low on fluid though. Is there anyway to add transmission fluid to this thing without putting it on lift while running and pump it in?

Doea any one know if its a difficult transmission to rebuild? I have the automatic with the tiptronic

Just trying to decide the best route. Thanks