Wonder Woman '77 Issues 7, 8, 9 feature Barbara Minerva becoming Cheetah with a Transformation including process and some clothes ripping over two pages and a reversion at the end of issue 9 with a tease of a further transformation yet unseen in coming issues, the full comics are on Comixolgy for 99c/69p each.
http://www.comicastle.org/read-wonde...7-page-18.html
http://www.comicastle.org/read-wonde...7-page-19.html
http://www.comicastle.org/read-wonde...7-page-20.html
http://www.comicastle.org/read-wonde...7-page-21.html
http://www.comicastle.org/read-wonde...7-page-22.html