My believe you have a thrust angle problem in the rear.
You have to steer against it keep the truck going straight and it causes that wear pattern.
Odd steer tire wear, wobble in the front end over 50mph?
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Gumper, Feb 8, 2019.
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Almost every single tire wear issue can be solved with 3 things...
1) A true 3-axle alignment with print-outs of before & after readings once every 12 months
2) Replace every single shock once a year, or 150k miles max
3) Most importantly IMO- Install Centramatic wheel balancers on ALL wheel ends, especially on steer axle. I have no clue why new trucks don’t come with these from the factory. They cost about $200 per axle and will easily give you 35-60% longer tread life in addition to eliminating tire wear issues.Gumper Thanks this. -
I have been planning on getting centramatics when the budget allowed it. We’ll see what the alignment shop comes up with today.
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It will be interesting to see.
My bet is your drive axel is forward on the driver side or back on the passenger side causing the truck to want to go to the right.
The counter steering to the left to keep the truck straight gives that exact wear pattern. -
Hulld Thanks this.
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I see the drag car in your avitar so you can relate to this.
A few years ago I was having a bad problem with my drag car launching to the right and heading for the guardrail.
Also my ETs were dropping off.
What I found is on launching as soon as the front wheels came off the ground it would dart right and I would have to let off and get the wheels on the ground to steer out of it.
I finally figured out with measuring that the ladder bar mount had gotten bent toward the rear on the passenger side from my buddy over tightening the winch cable on the hauler during tie down.
This ####ed the reared in the car enough
to change the thrust angle and it would drive to the right.
I redid the mount and got the rear straight and no problem now.Gumper Thanks this. -
Well the shop found everything to be just fine. Put two new Michelin steers on, and I guess we’ll see what happens.
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Might want to watch this video, there are three parts and explains must of the tire problems.
BoxCarKidd and Hulld Thank this. -
Few things rules that have to followed:
1: The tire shop has to have dry air, ANY moisture will ball up the beads and have a negitive effect.
2: make sure the beads are seated on the wheel/rim correctly.
3: older trucks need to have the wheels mounted on them with a centering device. They make lug nuts with a centering feature, there are other ways though.
4: heavier tires need more beads. For instance the Goodyear 399 /Dunlop 384 runout best with 10oz their heavier tires like the 287 and 751’s do better with 12 oz.
If you have a good tire guy/ shop, MY experience, balance beads are the best way to go. The few trucks we used the centrimatic didn’t show enough improvement to pay for themselves.
But that’s what I’ve found in 13 years watching this fleet.BoxCarKidd and spsauerland Thank this.
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