Name of diff seal near the brake shoes

[GK813]

While replacing rear rotors I found oil over the drivers side of the hand brake shoes hidden by the rotor so I'm looking into the seal on a solid diff but I don't know the names of the seals closest to the rotor the other side was OK it's not leaking

 

[J_D 2.0]

Rear axle seal.

 

[losh1971]

They come in a wheel bearing kit. You will need to replace the bearing as well. Any bearing shop should have the kit in stock as they are pretty common. You will need a press to get the bearing off. I've done them, a drill press is also an advantage.