Vibration 80 mph plus
 

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?

What does your pinion angle look like?

Looks great diff is Parallel with the front shaft The front shaft sits at about 0ﾟ and the diff sits at 0ﾟ

Also 2006 silverado extended cab

Start with the center support bearing. Replace it if it's loose.

It has to be pressed off/on.

Yeah I think that's what I'm going to do I just ordered one
It's funny because belltech uses these 2 holes in the housing to re locatebut Chevy's new version of the part does not have those holes anymore so kind of annoying luckily I was able to find neapco bearing from dennys ds that is og design

You can make your own relocation kit for about $12.

Well obv i already have 1.. any pics to see if its a better design?