chevyboi925

Long story short I had my driveshaft rebuilt 6 months ago and after breaking a driveshaft. I haven't really pushed it to its limits and I think I've stayed under 70 mph ..well recently I went from A3/6 drop to A4/7 drop and then today I noticed going about 90 miles an hour a pretty bad vibration and it seems really noticeable 80 to 90 miles per hour going over that almost seems to go away not 100% sure.. checkes my pinion angle seems great . I even rebalanced my rear tires ...and on the way home from the shop same thing ...I did notice my Carrier bearing had a lot of play between the rubber and housing so thinking maybe that's it I was wondering anybody else's input also I can't even use GMs new improved bearing because I am using belltechs Carrier bearing lift relocation kit that does not use the 2 studs ..but the 2 holes in the housing wondering if anybody has A4/6 drop without using any type of Carrier bearing modification and is doing just fine?

matslp488