Axle 8 3/4 end play adjustment

I agree pretty much with StrokerScamp but the clearence is the total amount of play of both axles combined so pushing one in or out makes no difference since they both have to move. There should be a little lock tab finger attached to a stud on the RH axle housing end. Remove that tab temporarily and turn the adjuster nut in or out to achieve .008-.018 end play although anything more than .012 is asking for a leak IMO. You should measure this with a dial indicator against the RH axle shaft for ease of adjustment. Push the axle shaft in all the way, "0" the gauge, then pull the axle shaft out as far as it will go. Read the gauge and adjust as necessary. your method will work... tap the adjuster with a hammer and screwdriver, chisel, punch, etc. if you need to. Sometimes they will turn with your fingers. The foam seal is nice if you can find or make one but not necessary. RTV will work too....it's just to keep dirt and water out of the axle bearing.