I am replacing the inner axle seals on my early 99 front dana 50. I have installed new seals but do not know how deep into the axle tube to set them as there is no built-in stop. In fact I can easily drive them straight through to the outer end of the axle tube. There is a v groove cut about half an inch in from the edge of the seal area. Not sure what significance it plays, perhaps someone knows the answers? Thanks for your help!