Have a leak on one side of the rear differential where the drive axle goes in. I removed the 4 bolts and disconnected the drive axle. I understand I should be able to just pull out the piece that goes into the differential to replace the seal but no matter how much I pull or pound it will not come out. Anyone know if there is a clip or something inside the differential that holds the shaft in place that has to be removed first? I would take the back plate off to check but that means removing the mount and I just know I am going to break one of the bolts off doing that. 1998 Rav4 4wd.