hyundai breather leak

2000 Hyundai Accent--leak which started to smoke a lot when I drive over 30-40mph---looks like it is coming from transmission breather---what to do if it
is not overfull?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.