Front End Making Popping sounds when make hard r turn

I know there is another thread about this same thing but it is old and I don't know if anyone still reads it.
We have the same exact problem with our truck. We have a 2007 Volvo 780. My husband has been all under our truck checking everything out.. Nothing is loose.

We just had new king pins and bushings installed. Maybe 6 months ago. Just a couple weeks ago we had had it in the shop in Texas and had the whole spring system replaced. we picked it up and went to try it out, When I turned right back into the dealership it popped again. The truck does ride better because the springs were worn out but evidently that was not what caused our problem. We have looked, pulled prodded on everything under out truck trying to make sure nothing was loose. The steering box, the motor mounts, anything my husband can think of .. we have checked.

We drove it yesterday to see if it was still popping, (we are at home right now. ) and it is still doing it.. We went into an abandoned subdivision and rode around swerving from the left to the right.. It pops really loud when we swerve left. He took the shocks off of it and we are going to drive it without them to see if it may be the shocks.

Does ANYONE have any suggestions?

 

We just had Leaf spring hangers on both sides of the truck installed 3 weeks ago. We had new air bag and leveling valve installed on right side of truck also. We have put cab air bags and shocks on .

 

We were only going to try it in the streets behind our home.. We only took them off to see if it's still popping.. If it doesn't pop without shocks I guess it could be that.

 

oh, we have owned this truck for 7 years and it has just started this popping thing in the last couple months.