Once the dowel pin is out of the torque tube you have to remove the bushing. Without the special tool it can be difficult. I drilled into the old bushing and put in a screw. I used a slide hammer which I put over the screw head and drew the bushing out. The seal can stay in place and will be pushed into the tube when you install the Okie assembly. I never pinned my Okie and so far it has been fine although having said that I am leaking fluid around the ball housing/transmission collar.
The axle vent if showing fluid around it means it is working. You can also move it or twist it to free it up.
Finally to verify if the fluid you are finding in the drum is tranny oil then just smell it. It has a smell unlike regular motor oil or brake fluid. If you have a bottle of tranny fluid smell it to compare.
