I have been having an issue with my truck for months. While driving at highway speeds it has a shake that can be felt through the steering wheel. The steering wheel has a tremble and it does feel like the steers shake. It drifts/ wanders. I feel like it has excessive drift and looseness as far as how much control I have of the truck.
I have had 2 alignments, replaced the kingpins, replaced bushings for the kingpins, u-bolts, bearings, replaced front steers and balanced. I might've had some other minor things done but it hasn't really made a difference or it was ok for a couple of days and then came back. It also sometimes pulls to the side when braking. I've put a lot of work into this truck but I'm considering walking away. Any suggestions would be greatly appreciated. Thanks
Suspension/ handling issue 2015 prostar
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Taylorla03, Oct 21, 2019.
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Have you had the spring bushings checked? Tire balance checked?
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What kind of drive tires are you running?
'pulls to the side when braking', maybe that brake to too tight. -
Hopefully when they were doing your king pins they checked to see if the axle eye where the king pin goes through wasn’t worn out like an egg. Sometimes they need to be drilled and sleeved. So if the pins were replaced and the axle eye is not round it will have a wonder like a loose king pin. Pulling when braking is usually one side is set tighter than the other. Check the adjustment on the brakes and make sure they are working the way they should.
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Makes a lot of sense. If this is the case would the kingpins need to be replaced again? I know it needs another alignment. Thanks a lot for the info. -
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If the steering wheel shimmies at highway speeds, you have a steer tire or wheel out of round or out of balance. You need to get the wheel spin balanced on the truck. This checks for out of round or off center wheels.
spsauerland Thanks this. -
I'm not an alignment guy by any means but what about the caster? Not enough caster can give the front end kind of a twitchy feeling.
Taylorla03 Thanks this. -
Taylorla03 Thanks this.
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How are your drums? Warped or OOR brake drums are commonly overlooked when diagnosing shakes. That wont explain the wandering of the front. Also check your draglink and steering box. You might be surprised how a worn steering box can make the truck feel.
Taylorla03 Thanks this.
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