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Discussion Starter #1
Anyone pull a heavy gooseneck using one of these style cushion hitches? Bought a new to me 24' 14k trailer and above 65 getting a bad vibration. I'm going to have the tires rebalanced on Saturday. It's got 14 ply tires on it and I wonder if that is transferring more road vibrations through the coupler also. Below 65 it pulls like a dream. I have another gooseneck that isn't as heavy with 10 ply tires and it doesn't vibrate at all. Thinking it's either the tires out of balance or the Load G tires are so stiff i can feel every crack in the pavement. I pulled it about 10 miles at 55 so I don't think it's flat spots on the tires.

The Cody Cushion Gooseneck Trailer Hitch Air Ride
 

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A buddy has a DIY air GN. I've ridden in the truck with my dozer behind it. Probably smoother than my truck. He says the big difference is an empty trailer not bouncing around.

A good snug coupler makes a big difference on GNs. Slop at the ball is amplified.
 

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Discussion Starter #6
I checked the lugnuts to make sure they are torqued since it has aluminum wheels on it. Good practice anyway. None of them needed more than 1/4 turn and most not even that much. I have an appointment tomorrow to have them rebalanced. I drove it again after retorquing and no difference. Really hoping that it's lost a wheel weight and I dont need to replace a tire or wheel.
 

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I'd look to see if any of the tires are flat spotted from brake lock-up. My right side forward tire on my trailer had a few flat spots on it because that brake was too tight when I bought it. It's hard to notice a tire locking up on an empty trailer, It didn't take long to ruin that tire. Non-round tires will transmit to the truck pretty badly.
Travis..
 

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Discussion Starter #8
I'd look to see if any of the tires are flat spotted from brake lock-up. My right side forward tire on my trailer had a few flat spots on it because that brake was too tight when I bought it. It's hard to notice a tire locking up on an empty trailer, It didn't take long to ruin that tire. Non-round tires will transmit to the truck pretty badly.
Travis..
Ding ding ding! We have a winner. I went to get them rebalanced today and on the way there I topped a hill on a 2 lane blacktop to find a car stopped in the lane waiting to turn. I mashed the brakes and trailer tires locked and smoked. Pretty sure that is the issue. Previous owner had the brake controller set for loaded weight and when running empty the tires were locking up and sliding. I watched them rebalance them and could see the tires running out of round. i asked the kid if the rims were running true and he said they are. They looked to be true to me too. Got them rebalanced and it's a little better but still shakes between 65-70mph. The sweet spot for highway speed. Gonna call a local retread place on Monday to see if they can shave them to true them up. The tires are damn near new and marked regroovable on the sidewall. I know the shaving used to be a thing with heavy trucks in the past but not sure if it is anymore??:confused:
 

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LoL @ previous owner's fault

Did you buy the truck and the trailer from that same PO?

Being too dumb to adjust your brake controller has got to be expensive in other areas of life.

"Why is it hot in here?"
The PO of this house had the A/C turned off.

Why is the water running?
The PO left it on.

Had a blowout. Damn PO had the tires aired down.
 

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Discussion Starter #11 (Edited)
LoL @ previous owner's fault

Did you buy the truck and the trailer from that same PO?

Being too dumb to adjust your brake controller has got to be expensive in other areas of life.

"Why is it hot in here?"
The PO of this house had the A/C turned off.

Why is the water running?
The PO left it on.

Had a blowout. Damn PO had the tires aired down.
Truck is mine and i have had it 18 months or so. trailer is new to me. i am still learning this trailer so to speak. i had turned the brake controller down quite a bit already. when i panic stopped it the trailer tires were sliding though. i turned it down even more after that.

i have pulled this trailer 50 miles so the tires being flat spotted is not something i have done.
 

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I learned with an old controller. It had woodgrain on it. It had one led. I still use the same process though.

Turn it all the way down. Hook up the trailer and squeeze the manual actuator as you pull out of the trailer's parking spot. The trailer wheels should skid in the grass/gravel. That'll knock the surface rust off the drums and you'll know before getting loaded if the brakes need work. If you need brakes on an unloaded trailer (I never have but everything I tow with is DRW or bigger), adjust them now I guess. If I'm leaving the farm loaded, I adjust them going down the driveway hill by slowly turning them up with my foot on the brake until the trailer slows the truck just a bit then back off just a bit. We do this with the windows down so you can hear if a wheel locks up in the gravel. That's it. If I'm leaving unloaded, I leave them all the way down till I get loaded. I already know they work from the field drag. Then I adjust as described above, slowly turn them up till they're felt over the truck then back off a little bit.

My current controller has a boost setting. 1 is stuff lighter than the truck. 2 is stuff about as heavy as the truck. 3 is stuff heavier than the truck.

See how this process would basically never lockup brakes in a way that could flat-spot tires? It's all done gently and slowly. Horsepower is for hills, not parking lots or high speeds. Doing it the way I was taught also doesn't waste trailer brakes or get them hot. They're there to help the truck, not do all the work.
 

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i have pulled this trailer 50 miles so the tires being flat spotted is not something i have done.
You could flat spot them in 50 feet since you didn't realize your controller was turned up. If you were traveling at a decent clip and jabbed the brakes for whatever reason, there's your issue.
 

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Discussion Starter #14 (Edited)
I should clarify that I dont think the tires are flat spotted, they just arent running round and true to the wheels. I watched them all spin on the balancer at the tire shop. You could see the wheels were running true the outside of the tires were not. Think Swampers... They are better after rebalancing but there aren't smooth as glass like the other trailers I own. I'll just have to deal with it i guess. I have not loaded the trailer down to see if weight on it will smooth it out.
 

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You said they're out of round. You said they slid and smoked. You said you don't think they're flat-spotted.

How could sliding a nominally round tire, that isn't rotating, against a surface harder than the rubber from which it's made, to the extent required to heat the tire to its off-gassing point (smoke) NOT flat-spot it?

Go grind some rubber off a new round eraser in a single direction without creating a flat face. Not gonna happen without rotating it.

Denial is deep.
 
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