Pinion wont tighten

[rockola1971]

From what I can see my bet is improper position of tapered bearing fwd or rear of pinion assembly. Either one of these instances would cause the problem you are having. If the rear bearing is slid back enough to the pinion gear then it would be impossible to take up the slack by tightening nut. If the forward bearing was pushed to far forward (toward the nut) then it would be impossible to get the assembly tight enough to take up all the slack. There should be pronounced marks on the shaft that shows where the old tapered bearings were positioned originally.
Verify your bearing part numbers fit the GM 8.6" rearend.
Here is a decent video to compare yours too.

Maybe call these guys and im sure they know the common screwups of assembly on GM 8.6" rearends: https://www.yukongear.com/

 

[cames645]

Well I figured it out the dummy who pressed the pinion bearing on through the new bearing race in the garbage and reinstalled the old one I'll tell you it's he'll getting old lol thanks for all the replies now that I really look like a dope I'll go put it back together

 

[rockola1971]

Well I figured it out the dummy who pressed the pinion bearing on through the new bearing race in the garbage and reinstalled the old one I'll tell you it's he'll getting old lol thanks for all the replies now that I really look like a dope I'll go put it back together

Great News! Now I hope you know how important it is to get the preload set correctly (to spec) and pinion to carrier gear angle set correctly. Take your time and the rearend will live a long happy life. Good luck my friend!

 

[cames645]

Yes I do and thank you I think I'll be good from here just a perfect example of being in a hurry and not paying attention