firekiller15

Yes I am feeling the vibration at all speeds, use to be smooth as silk prior to the swap. What is your opinion sportsroof?

Yes I did...went from a factory 3.0 open carrier to a 3.55 w/ trac loc.

The center chunk is new...new ring/pinion, bearing kit and a currie trac loc. And the springs are aftermarket, they match the OEM ones. I will try what you guys suggested, thanks.

Just upgraded my 9" today...I removed the housing put in new 3rd member and new axles along w/ new stock height 4 leaf springs. I know have a bad vibration while driving...any recommendations on a fix? I'm thinking pinion angle or drive shaft. Thanks.