Installed driveshaft bearing, have vibes still

alright, let me prefix this with my vibration issue is also partly due to needing to install the ECGS front diff bushing. In the process of sorting thru my vibration issue, I found that my rear driveshaft bushing had a lot of playing in it, I figured this was contributing to the issue and the bearing wasn't too expensive so I replaced it. Reinstalled everything and now I've got a different kind of vibration. Instead of having a vibration on acceleration, once I get past 25-30, I get a driveline feeling vibration and it doesn't go away (I only got up to about 50 during the test drive). So what's my issue?

I've got two hunches, #1, I put the drive shaft together out of sync and just need to take it apart and make sure the u joints are all aligned properly to each other. #2 I need a bearing drop installed, with the old bushing being so worn out, it was allowing my driveshaft to get closer to flat and mitigate the high speed driveshaft vibe and now that I have a bearing that holds it tight and good, it's causing a vibration from being at an angle.

Any ideas? I'll be tearing back into it tomorrow

 

For anyone looking for an update or that stumbles upon this during a search with a similar problem....I wasn't paying attention and put the front half of the drive shaft back on 180* off of where it was balanced and that was what was causing my vibration. I realized it shortly after posting and tore everything back down yesterday and verified. Problem is all fixed now.

 

Nice job man.