How tight is the Pinion Yolk?

Yup, can't reuse the crush sleeve. Either replace it or go with the crush sleeve eliminator. Also when you put the yoke on put some grease on the splines, it will help keep the rear lube from leaking through the splines.

When I rebuilt my 489 i was surprised at how easily it slid on and off AFTER getting it off the first time. I have had zero issues with mine.