bouncing truck

My truck has a bounce to it, at times. I notice it when I am against a headwind. worse when loaded, but when empty too. I had over time everything replaced on the front end. most recent all shocks front & rear. the only thing never replaced is spring hanger bushings. could they cause the bounce? I thought maybe it is the cab itself. does that make sense? all tires wearing even. nothing has been done to the rear of truck, as far as bushings,hanger bushings. e.t.c. I do have some flat spots on trailer tires. could that cause the bounce? I know it does to some extent, from experience, but what has me guessing is it does it a whole lot worse when I am against the wind. going the same patch of highway in the same lane, 1 day it bounces, next day it does not, pulling empty trailer. if I had another trailer, I would pull it to see if any difference. I can also lessen the bounce by going slower or faster. sometimes, I have to go 10 m.p.h. faster, some times have to go 10 m.p.h. slower to get the bounce to be less severe.

Just another one of those bug's I'm trying to pinpoint. thanks.

 

There are no air bags on the rear of cab. Spring ride cab. intl coe. is spring hanger bushing, same as shackle bushing?

 

I had t.c.i put new steers on & 3 axle align with centramatics on steers. they checked it out, said everything was tight. this was 90,000 miles ago when they put tires on & just last month to recheck things. also went to mgriff tire co, they said all was tight.could not find any problem under the rack. I don't know if tires were balanced on truck. always had to drop truck off due to their, well get to it sometime today. I wanted to really concentrate on all the symptoms & at lower speed 45-50 I can put the palms of my hands up under steering wheel & feel a vibration too, along with bounce.

I am leery of some incompetent shops. last time I had truck cutting out on me & engine stop light come on, took 2 weeks downtime, 2 different shops, new sensors, e.t.c. $775.00 & never fixed the problem. I took it upon myself to guess & replaced all battery cables, main & jumpers. never had a prob with that since. when ever I have tires put on I tell them to check it all if anything needs attn call me. some are lazy & just want to sell you tires & have you out of the way so they can get the next customer in.

 

I do have one one shop, where I had my kingpin bushings put in years ago, does great work. never had a prob. they are backed up on appoint. so i guess I can go there. I just hate to schedule a appoint for a week out, not knowing what work I may have at that time. I could make one & then so happens that would be my $ 4,000.00 week. real sporadic work right now. one week 2 loads $800.00 next week 7 loads $3,500 so like others I am here trying to get free info & give back thee same when I can.

 

it does help & make sense. I have bf 244 on the steers. but the set I have now was not put on by the shop I trust. they were out of the bf's & I would of had to wait a day or 2 to even get an appoint, so I went a block away to T.C.I. & they put bf's on. I should of waited to get in the same shop I had the bf's put on once before.. thank you.