8 3/4 axle problems

Either you have crossed the axles or have installed something to the wrong spec.If you had the axles in before and had no problems,you have done some thing to change the end play.Are the seals installed at the right depth!,do you have the green bearings! With both sets of axles,what side are you installing the adjusting axle on?Your bearing you installed or the seal is bottoming on the axle when installing it.You might have the wrong bearing on the axle which is wrong too,mrmopartech