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The pinion yoke that came with our P15's rear diff will slide off and on the splined pinion shaft by hand. It does seem to be clocked however or maybe it's just a wear pattern - (by clocked I mean it will slide on when you rotate it and find the sweet spot alignment....this same pinion yoke was worn badly and I didn't much care for the narrow width speedi sleeve that's available for this yokes journal size, so we had it sleeved at a machine shop with a thicker sleeve they machined and pressed onto the yoke. After it was brought to my attention that due to this machining, the integrity of the yoke may have been altered enough to make it unsafe, so I began my hunt for another yoke. I purchased a yoke listed as NOS, and after receiving it I believe it to be a NOS part as it showed no signs of ever being installed, was covered in a thick cosmoline looking grease, and had a grease impregnated thick cardboard protective sleeve in place around the journal of the yoke. No rust anywhere EXCEPT for the journal area which had some light surface rust. ( due to the cardboard holding moisture over all the years I expect )...we polished off the rust to a clean surface (which resulted in removing 1.5 thousands of metal from the O.D. of the yoke journal). This new pinion yoke also seems to have a sweet spot where it will slide on the pinion shaft the furthest when clocked/rotated to a specific position, however - even in this sweet spot - it stops just slightly over a 1/4" shy of going all the way inside the diff to rest up against the pinion bearing. So it slides on easily for about 3/4"- then I can get it to go a bit further on by using the palm of my hand and forearm like a hammer...at this point I've got plenty of threads exposed on the end of the pinion shaft to put the nut on and pull the yoke on in with the nut and washer. Here's my question please for those of you experienced with these tapered axle diffs. 46 Plymouth P15,...IS THIS TIGHTENING UP ON THE PINION SHAFT FOR THE LAST 1/4-5/16 INCH CORRECT....OK.....PINCHIE WEANO'.....?? Folks I've talked with up to now, have told me that when they removed their pinion yoke - it slid off and on by hand,..like my original yoke does,..however my service manual does show a Miller tool C-452 being used to remove the drive pinion flange, which makes me think that a yoke without any wear must have had a bit of an interference fit... Trying to find out if this is OK, before I end up in a tight spot that could have been avoided. Thank you again forum members. Steve