Axle bushings

What would symptoms of worn bushings be in a volvo 780? I'm assuming these are actually the suspension bushings rather than axle, they are in the leaf springs on the drive axles. Anyway when I loose my air at night the truck I guess moves a couple inches when the bags lose their air. The front drive axle bags look rolled forward when no air in them. Will move a trailer about 3 inches from dock stops if air runs out of bags then too. Would this cause the truck to feel like its jetking when driving or maybe make ubolts on axle shift around?

 

Well gosh dang idk what the deal is with my truck then. Thank you for the answer though. I'll just have to try to figure out the air leaks. It's annoying to me still even if it isn't the cause of anything else. Alignment when I got one done last week guy said one axle was hard to align probably cause of bushing. Just got me to thinking maybe thats my issue with it feeling like it's jerking sometimes going down the road.

 

Ubolts got replaced before the alignment. The shop noticed they'd shifted some. Not sure how or why though. They were riveted on so shop had to cut them off and replace with ubolts and nuts.

I'll keep looking into the jerking. It isn't all the time, kind of hard to explain could be steers maybe or something off center. I'll let you all know when I figure it out though.

 

I'll have to do that, if I can find sockets big enough. I have a shade tree mechanics tool set with me, and that's all. Come to think of it though it did feel a lot better after they did all that then not as good feeling. So might have come lose again already.

 

The guy that I bought the truck from had new front leaf springs put on, but I don't think they changed the shocks. He had that done at Bruckners in Ft. Worth. But he was one of those "if its not safety related I don't worry about it" types. He was honestly a #######. Idled the truck for no telling how long because he was so stupid he didn't realize all he had to do was wiggle a dang fuse to get the apu to work. But thats all another story. I need to go get the clutch or transmission calibrated, I know because the kickdown on the accelerator pedal doesn't work. It should downshift on its own pushed to the floor and it doesn't. Unless the sensor is bad, and the pots inside the throttle pedal sensor are fighting each other. I did at one time swear I had a bad injector but it starts too easily for it to be that.

 

A lot of my issues with the uncomfortable ride and really bad jerking was believe it or not the freakin cab bushings. They replaced those and it rides a hell of a lot better. The cab use to bottom out, a lot driving down the road. Especially on that rough spot on 30 heading east toward Little Rock. Now I know I need new cab shocks even, and it still doesn't bottom out with the new cab bushings being put in. Other than these nuance issues I am having to chase down its not a bad truck. Definitely wouldn't have paid what I did for it though had I either a.) gotten to pull even an empty trailer behind it when I test drove it, or b.) was given the opportunity to have it thoroughly looked over by a well qualified mechanic, not a mecca-nic like he was taking it to for all his work to be done. He got screwed on a lot of things with that mobile repair service guy he was using.