confused about tranny leak from driver's side axle
 

after my clutch install I started leaking fluid from the drivers side axle. Its a slow leak but a leak nonetheless. I plan on fixing it myself this weekend and was doing some research here on evom and came across a few threads that were helpful and a few that were confusing.

I need clarification on the following:
1. what fluid is leaking, tranny or transfer case (I thought I knew but now Im doubting myself)
2. what is the part # for the drivers side axle seal I will need (I cant find it anywhere threads, service manual, etc...)

help would be appreciated, thanks

Chris

1. Transfer case.
2. Wish I new the # for you.