Rear Passenger sea sickness due to highway bouncing?

[Jetboy]

Motion sickness is due to the brain/inner ear not being connected to the motion. You never get motion sickness while actually driving because you are connected to that which is causing the motion. Similarly on the ocean, I make the sea sick person drive the boat. No time to get sea sick when you are fighting the seas.

People sitting in the back seat aren’t watching the road and are more susceptible to getting motion sickness.

That's from the literature on suspension design engineering. There's a mountain of research journal articles on it. They kinda all reach the same conclusions on frequency range. The general theory is that it's related to the biological frequency of the human walking motion and going to far from that frequency tends to induce motion sickness.

I've never had anyone get motion sick on my sailboat and I'd guess it's the same kinda issue. It's a trimaran with wave piercing hulls and doesn't really hobby horse like my past 4KSBs. The motion isn't anything I'd call comfortable, but it's sharp and kinda fast motion rather than gradual and smooth. But it doesn't seem to cause motion sickness for whatever reason.

Having someone drive or steer does seem to help a lot. Even just being in a front seat vs back can really help too.

 

[patkelly4370]

If the affected person is reading or staring at an electronic handheld device, that could be a cause.

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[Steve40th396]

I think I may have found one issue. The drivers side shock has allot of oil on the oustide. Looks like the bolts holding the oil line leaks? or is has over time. Wondering if that means the XRAES is bad.
I will start a new thread with pics..

 

[2021nightshade4x4]

You’re either susceptible to feeling motion sickness or you’re not.

You could be riding in a Rolls Royce or an old Wrangler and it could still happen.

The difference being how close each vehicle brings you to the point of no return!


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[Steve40th396]

You’re either susceptible to feeling motion sickness or you’re not.

You could be riding in a Rolls Royce or an old Wrangler and it could still happen.

The difference being how close each vehicle brings you to the point of no return!


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True. My wife does have ear/vertigo issues on rare occasion. So she is the lowest denominator on the speculation sheet.. But after taking pics of my shocks, I think the drivers is leaking, and since there is no real test that I know of or read about, its probably best to replace them soon..
I wont do the OEM shocks system. I will probably go Eibach. I like the 5110/6112 versions, but I think Eibach has springs matched to their shocks.
Regardless all aftermarket seem to be far better than OEM.

 

[2021nightshade4x4]

True. My wife does have ear/vertigo issues on rare occasion. So she is the lowest denominator on the speculation sheet.. But after taking pics of my shocks, I think the drivers is leaking, and since there is no real test that I know of or read about, its probably best to replace them soon..
I wont do the OEM shocks system. I will probably go Eibach. I like the 5110/6112 versions, but I think Eibach has springs matched to their shocks.
Regardless all aftermarket seem to be far better than OEM.

Same here.

2021 Limited is “okay” tolerable.

Wife used term “seasick” to describe how she felt riding in my Durango, though. 230k miles, original shocks. No leaks but I’m sure internal issues contributing to bouncy ride.

Replaced with Bilstein 4600’s and it rides like a Cadillac now. Many Jeep people say that the Bilsteins are harsh, but I believe you just have to have a heavy enough vehicle to take them, then it’s REALLY soft.

Both 1st Gen and 2nd Gen Durango owners say 4600’s are the biggest ride quality improvement for a set of shocks they’ve seen.

Makes me wonder what to use on the 4Runner when X-REAS goes out.


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[Steve40th396]

I put the 5110s on my Chevy Silverado, 2008 with Z51 2wd. Rode so much better. Of course, it was at 100000 miles on Delco/Remy??? OEM shocks..