2009 Volvo need some advise

27w021 st charles rd, Carol Stream IL being that i am a small shop hours are always flexible within reasonable times

 

Check the tandem alignment. Do not go to the shop with Hunter laser paser crap computers. Simply put long enough ruler to the both rear wheels. It should touching in all four points. Ask me how do I know.
I have 4 alignments in 3 different shops, two carrier bearings reaplaced. All shops gave me a paper with 0/0 and vibration in place minus $250. Then I start searching how this f....g Hunter computer working?
Oops. Computer will set center line of your truck by front axle and if front axle isn;t sitting right everything is screwed up. Everything will be scerewed if truck has a n air leak because frame will go down and change the angle.
I have this problem solved with case of good beer, my friend and simple tools from Home Depo.
http://dnr.louisiana.gov/assets/TAD/education/ECEP/diesel/g/g.htm