I have a 2008 Quad Axle Livestock Trailer that has a shake/bounce. When loaded it’s most noticeable when I reach 60mph on an incline. When empty it’s most noticeable reaching 70mph. I notice sometimes if I’m going 65 and I start coming to a coast that it’ll have the same bounce. Also noticed sometimes when I slow down for something it’ll do it when slowing down fast ( Using my jakes or using the brakes ) . When it shakes/bounce it’s usually does the opposite for 3 seconds then stops for 3 seconds , Trailer has been in the shop for this and can’t seem to get it figured out. Just had alignment done and axle bushings replaced . It’s 100% the trailer. I’ve hooked up to 4 other trailers and problem only exists with this trailer.
Trailer has a shake/bounce at 60mph and above
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Brandon0928, Mar 27, 2023.
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Shocks? Have a steerable axle on it that needs stabilizers? Tires trying to be squares?
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Cupping indicates the wheel is bouncing or wobbling as it rolls, producing an intermittent wear pattern. It can be cause by bad wheel balance, a bent wheel or hub, or an extreme alignment issue. Worn shocks too, but that's rare on trailer tires.
I would also take a closer look at the suspension even though axle bushings were replaced. You have done shocks and alignment so that leaves balancing or a bad wheel or hub.
I would also try asking the trailer manufacturer.
Understanding irregular tire wear (fleetequipmentmag.com)
The article talks about uniform mounting and runout. Also refers you to TMC Practice 252.Last edited: Mar 28, 2023
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Use a point and shoot temperature gun to find out which tires are warmer than the others. That will be the problem ones. Usually a out of round tire or unbalanced tire. Centramatics or balance beads can help.
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