Truck fishtailing problem

Ok maybe someone has had a similar situation and can help me out.. Here is what's going on.. my tractor almost jackknifed on me in the rain one day... I had a very slight lean on the passenger side and later noticed my passenger steer leaf spring was slightly bent... So I had that replaced and after I started to notice that my drives were swaying in a fishtail sense on turns going up and down hills and curves they also fishtail when I drive bobtail this is very scary in the rain on my last load I only felt safe driving at 40 mph because it got really bad!! when I make turns with a trailer hooked up I fishtail especially turning to the left and my tractor rear swings and slides to the right almost into a jackknife as if I'm on an icy road and its a dry road... So I took it to a shop and they said my rear rear alignment could be off due to thrust angle... so I had a full alignment done at crenshaw in richmond, va and the problem persisted... then I took it to another shop and they were certain it was an alignment and that it was done on an old system.. so I had them do a full alignment and replaced the driver side leaf spring in case still the problem persisted... I also replaced my cab shocks and bads to make sure.. Any ideas? I feel like my rears are totally separate from the tractor.. what else could it be I have spent thousands of dollars trying to figure this out and I don't feel safe in my truck at this point for myself and others.. please help thank you in advance ~Mel

 

I’ll grease and check tnx

 

May be right i just put 8 new double coin drive tires steer tire new as well

 

I have 2007 freightliner columbia resently they hit concret and replaced whole front axels and used steering box, leaf springs on driver side, and new kingpins, new tie rod , new drag link pretty much everything is new on steer axel and now i feels swaying and fishtailing its just so scary to drive out there

 

Yes i have airbags on rear axle i just greased my fifth wheel i’ll check when i got unloaded. Scary thing is small turn my steering left or right my trailer tail is swaying very sensitive you know...