http://www2.dana.com/pdf/J3311-1-HVTSS.PDFThis really is one of those times to go with an expert(Spicer) and follow what they say....hope I don't offend anyone on here, but just because you have never had a problem with a certain set up does not make it right. Vehicles all see different use by different people which will affect what problems people see.
Have a read....if you still have questions then we are here to help, but I think they do a great job of explaining how and just as important WHY you should do it a certain way.
Tad