JMLhauling Posted May 10, 2022 Share Posted May 10, 2022 Here's a youtube video i took. SO i got loaded for my first load of the day and i heard AIR like my drop axle wasnt filled yet after a good min. turned out it was 1 of the air bags on the drop so i looked at my drop axles and looked them over and seen the bushing where shot . so i took the truck to a shop and they changed the drop axles bushings. i got the truck back and got my first load truck was fine driving until i hit a bump and they i got the death wobble. i thought maybe it was just random. its been a week or 2 its still does it after hitting a bump so i hit the button and it stops and hit it right away to drop it again and its fine until i hit a bump again. it cost me $5500 and they had it for 10 days so i needed to use it to work for 2 weeks and just deal with it. but im bring it back this friday . i changed the steering stabilizer all 4 i have a quad axle the first is the 1 wobbling in the video. Before having the bushings change the axles never did any wobbling even know the bushing where bad. and the tires are fine maybe 1 is a little little choppy thats it. any help would be amazing thanks Quote Link to comment https://www.bigmacktrucks.com/topic/69705-death-wobble-steerable-drop-axle/ Share on other sites More sharing options...
JoeH Posted May 11, 2022 Share Posted May 11, 2022 How are the king pins? I assume these use a tie rod from left to right? How are the tie rod ends? I drove an oil delivery truck that had a nasty wobble, the trucks usual driver just put up with it. When I drove the truck I went straight to the tie rod ends and the one was horribly worn out, about ready to fall apart. Boss had the truck fixed the next day. Quote Link to comment https://www.bigmacktrucks.com/topic/69705-death-wobble-steerable-drop-axle/#findComment-497366 Share on other sites More sharing options...
Dirtymilkman Posted May 11, 2022 Share Posted May 11, 2022 Make sure the didn't put a lower arm in the upper position and the upper in the lower if it is possibleon your brand of axle. That could change kingpin angle. Also tie rods and make sure u have enough air pressure in the bags Quote Link to comment https://www.bigmacktrucks.com/topic/69705-death-wobble-steerable-drop-axle/#findComment-497385 Share on other sites More sharing options...
Moparmike Posted May 11, 2022 Share Posted May 11, 2022 when my truck did that I just changed the shocks problem solved try to push your wheels from side to side shouldn't be able to if so your shocks are bad mines would get the truck to wobbling scary 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69705-death-wobble-steerable-drop-axle/#findComment-497397 Share on other sites More sharing options...
JMLhauling Posted May 12, 2022 Author Share Posted May 12, 2022 i dont know the name of the drop axles. but i dropped it back off today and when i looked it over when i was waiting for my buddy to pick me up and he got there me took a tape measure out and check like 10 different spots and the front axles seems to be off to the right by like 2 inchs so im hoping they do an alignment this time on the drop axles and not say they did and not do them. and i had my front steer king pins done and the caps are the old ones and they said they use the old caps sometimes becuase new ones are sometimes not the right fix and now in my head i feel like i didnt even get the king pins down. but well see when i get the truck back if the wobble goes away. Quote Link to comment https://www.bigmacktrucks.com/topic/69705-death-wobble-steerable-drop-axle/#findComment-497488 Share on other sites More sharing options...
Joey Mack Posted May 12, 2022 Share Posted May 12, 2022 steerable drop axles? check 'down' pressure,, probably 60 ish.. check 'toe' on the wheels, tie rod end's, check the steering stabilizers for soft reaction's/ easily compressed and extended, do you have balancing bags in the tires, and put wet air in them from an air compressor that has water in the tank? Are all the mounting bolt's tight? just a few thought's,,, I know some of this is repeated... jojo 2 Quote Link to comment https://www.bigmacktrucks.com/topic/69705-death-wobble-steerable-drop-axle/#findComment-497489 Share on other sites More sharing options...
theakerstwo Posted May 13, 2022 Share Posted May 13, 2022 I had a bobtail that for about three years i had same problem.It has two drops and i found what the problem.Both of mine and many of my friends had same problem.Too much caster.When you would hit a bump some times one or both would go nuts.Mine was about 12 to 14 degrees.I shimed them to 5 degress and you cant make them shake.Two different friends of mine did same thing and no problem.Its just like your steer axle on the truck if you turn it all the way to the left one side of the truck rises and the other side lowers.If you turn it all the way to the right one side raises and the other side lowers.So if you go down the road and hit a chuck hole then your wheel will shimmy some but with too much caster it goes nuts.If you have a big truck front end alignment shop around call him and ask if he has seen this.Set you caster and make sure your toe/in is about 1/16 you will be happy.Let us know what happens. 1 Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/69705-death-wobble-steerable-drop-axle/#findComment-497497 Share on other sites More sharing options...
Popular Post JMLhauling Posted May 19, 2022 Author Popular Post Share Posted May 19, 2022 The front drop axle was not aligned wobble is gone now. thanks for all the ideas 3 Quote Link to comment https://www.bigmacktrucks.com/topic/69705-death-wobble-steerable-drop-axle/#findComment-497994 Share on other sites More sharing options...
Joey Mack Posted May 19, 2022 Share Posted May 19, 2022 (edited) That's great !! do you know what adjustments were made? Just in case someone needs the info... Jojo Edited May 19, 2022 by Joey Mack Poor spelling Quote Link to comment https://www.bigmacktrucks.com/topic/69705-death-wobble-steerable-drop-axle/#findComment-497995 Share on other sites More sharing options...
terry Posted May 19, 2022 Share Posted May 19, 2022 10 hours ago, JMLhauling said: The front drop axle was not aligned wobble is gone now. thanks for all the ideas nice to hear back when a problem was solved! terry 2 Quote Link to comment https://www.bigmacktrucks.com/topic/69705-death-wobble-steerable-drop-axle/#findComment-498013 Share on other sites More sharing options...
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