Truck vibrates/shakes when fuel tanks are low on fuel

I do have tru ballance on steer and drives and also centramatics. I tried without centermatics but same thing. Right now im swapping 4 torque rods to Atro T59-41474. I hope this fix problem since i installed afto bushing on swaybars around same time vibrations started. I think Atro poly bushings on swaybars doesnt work good with OEM rubber torque rod bushing on top. I think they fighting since there isnt much play in poly bushing like in OEM rubber ones. We eill see. Il runing out of ideas. There is chances my axle have to be adjusted to propper angle so i may take it to KW, they also have vibration diagnostic tool with sensor and they may be able to found out where vibrations coming from

 

Well with new Atro torque rods there is less vibration. Now im gona try ger differentials angles/slant

 

If you talkin about bearing in the tranny than yes, a few weeks ago i got new reman 13 speed due to broken some synchros and grinding issues. CIT KW in STL give me hell of a deal on reman tranny, clutch, bell housing, Atro front and rear mounts and labor, If you talkin about carrier bearings, i have two of them and replaced them with Atro units

 

Tranny had some other issues, and original clutch was going out
Yeah i spend #### load money on this truck, mostly on non broken parts, it was more like its not broken, but its old is f$&k. And truck was sitting at previous owner. So might as well replace some parts that will worn out soon, and helps on tax, i have to give money anuway so better give it to the truck

 

Installed missing eight 10mm alightment spacers on control arms, adjust height and vibration is almost gone. These washers should fix axle angle. I may need do 3 axle alightment just to be sure

 

Did some testing. On empty or light or heavy loaded trailer if i move tandems on trailer all way back, bouncing is almost gone. So it have to do something with tandems pivoting when thay are all the forward. But i dont get it, shocks are brand new, new leveling walve, nothing leaking, tires are evenly worn out (all trailer tires are my old Bridgestone 283a steers) no air leaks and trailer is 2016 Wabash that i bought new. I dont think bushings are bad already but ill check them, maybe bad bearing. But BUT here is kicker, on wet road, tight after rain or while raining there is no bouncing vibrations even if i slide trailer tandems all they forward. This is strange is f$@k

 

Im im getting to the bottom of this #### truck bouncing vibration. I just hooked friends 2018 wabash dry van. No vibrations at all. SO something is wrong with my 2016 wabash dry van trailer. Yes i bought new and its got new hendrickson shocks, new leveling valve, my old virgin bridgestone steers. Good tire wear. Wheel brearings are good. Hubs doesnt overheat. I even had centramatics on trailer but took them off because i thought it was them but it wasnt. Drums are original. I just got Tru ballance centering sleves for steel/stee/drums. I dont know what else could be bad. I talked with Hendrickson and they said if bushings are bad it will bounce but mine bushings are good. And they say it can be tire or tires