8-3/4 axle seals?

So i took my dart out for a spin. After parking it I kept smelling what i thought to be gear lube. I looked under the car and nothing was dripping. Came home and after it being parked for s few days gear lube had leaked out of the drums and down the inside of the tires.
Is the seal that needs replaced on the outside? Where I just pull the axles and install the seal and stab them back? Google is showing me an "inside seal" I really don't want to pull out the pumpkin if I can help it... Any help is appreciated! Thanks!