It's very easy and took me only 30 minutes. This was after I was quoted $550 from a trans shop and they claimed it was a 5 hr job and the exhaust had to be dropped... RIP OFF!!!!
I did not drain the trans fluid when I replaced the seal.
Awesome! I ordered the part ($5-ish) and the tool ($30-ish) so for $35 this could be wonderful......knock on wood.