8 3/4 gear set up help

OOPS Left that out.....crush sleeve eliminator, set correct.I know, it shouldn't be that hard. I have slambed together lots of other diffs,with no issues many times.My 742 /spool 4:30's race car, no issues, got it right away.
Based on the internet, everybody has had gear noise with whatever gears.Everybody has a different opinion (pun intended)Friends run Motives with no isuues.
Thanks for your input.