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Discussion Starter · #1 ·
We have a 2018 EXL with 78k miles.

We noticed the ride quality on the highway/road trips is not smooth. The kids are also complaining they feel car sick from the motion which was previously only a problem with our previous car (a 2004 Sienna with blown suspension). The tire wear is even and there is no feathering so they’re not completely shot or anything.

I’m thinking of having my mechanic replace all four shocks with aftermarket parts.

Any advice or recommendations?

P.S. At 50k we had to replace a leaking shock in the rear, which was disappointing but it did improve the ride a bit. As a result I won’t replace with OEM shocks again..
 

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We have a 2018 EXL with 78k miles.

We noticed the ride quality on the highway/road trips is not smooth. The kids are also complaining they feel car sick from the motion which was previously only a problem with our previous car (a 2004 Sienna with blown suspension). The tire wear is even and there is no feathering so they’re not completely shot or anything.

I’m thinking of having my mechanic replace all four shocks with aftermarket parts.

Any advice or recommendations?

P.S. At 50k we had to replace a leaking shock in the rear, which was disappointing but it did improve the ride a bit. As a result I won’t replace with OEM shocks again..
Remove all gadgets from kids, if they play phones/tablets/consoles they will feel dizzy
 

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On my first road trip along a windy highway my kid got sick from the body roll. I installed the Timbren SES which helped with the roll, but it's not without its drawbacks: it's alot firmer in the rear.
 

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Non-suspension things it could be:

Tire out-of-round, or cupped from prior shock issue - rotate and see if you change from a rear vibration, to a front shimmy.

Tire compound gets hard in cold weather - especially a problem with "summer high performance" compounds, they get hard and "greasy". Can magnify any "roundness" issues when the tread becomes less compliant. Does it improve in warmer weather or after tires have warmed up in driving?

Simple fussiness in the passenger seat - you're on your own, there.
 

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Non-suspension things it could be:
Tire out-of-round, or cupped from prior shock issue - rotate and see if you change from a rear vibration, to a front shimmy.
Tire compound gets hard in cold weather - especially a problem with "summer high performance" compounds, they get hard and "greasy". Can magnify any "roundness" issues when the tread becomes less compliant. Does it improve in warmer weather or after tires have warmed up in driving?
Simple fussiness in the passenger seat - you're on your own, there.
Speaking of tires, I wonder if ditching the terrible OEM tires for some decent Michelins would help. These OEM tires are the worst tires I've ever seen. If the temperature drops even down to 50 degrees, it takes a fair chunk of road to warm them up so they're round again. Until then, I feel like I'm driving Fred Flintstone's car.
 

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Discussion Starter · #7 ·
Non-suspension things it could be:

Tire out-of-round, or cupped from prior shock issue - rotate and see if you change from a rear vibration, to a front shimmy.

Tire compound gets hard in cold weather - especially a problem with "summer high performance" compounds, they get hard and "greasy". Can magnify any "roundness" issues when the tread becomes less compliant. Does it improve in warmer weather or after tires have warmed up in driving?

Simple fussiness in the passenger seat - you're on your own, there.
No it does not help. I also already put on a set of Michelins.

At almost 80k, I think it’s time for new shocks. I searched and it doesn’t not seem like there are many options besides OEM and one type of Monroe.
 

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We have a 2018 EXL with 78k miles.

We noticed the ride quality on the highway/road trips is not smooth. The kids are also complaining they feel car sick from the motion which was previously only a problem with our previous car (a 2004 Sienna with blown suspension). The tire wear is even and there is no feathering so they’re not completely shot or anything.

I’m thinking of having my mechanic replace all four shocks with aftermarket parts.

Any advice or recommendations?

P.S. At 50k we had to replace a leaking shock in the rear, which was disappointing but it did improve the ride a bit. As a result I won’t replace with OEM shocks again..
Concerning your issue, I hope this can relate to my case as well. A mechanic replaced the front Lower Control arms, and the sway bar links on both sides and steering wheel does not shake anymore (before this replacement steering wheel shook a lot). I was hopeful to also get the rear vibration issue fixed. However, the rear vibration continues even after replacing the rear shocks.

At this point, I am caring a bit less now because I have invested more on this van than on other branded vehicles on their suspension, which apparently those vehicles did not have this vibration issue.
Could it be that the problem related to rear vibration at highway speeds can relate to worn out bushings and worn out control arms in rear suspension? Also, keep in mind, that the tire rotation was done and the front tires were rotated to back, and the back tires to the front. The ones that were in the front had a noticeable wear from inside face/wall, due to the old worn out lower control arms. Another point is that the vibration in the rear suspension still continued, once again, even after replacing rear leaking shocks.


At this point, also, could it be that I might need new tires for the back only? The once rear tires that went to the front are in great shape. And I admit that since March, when vehicle got new tires, all 4, I had not done a tire rotation on this vehicle.

If you or anyone don't mind sharing the vibration experience on these Odyssey vans, after shock replacement of rear shocks, that will be greatly appreciated.

P.S. I'll be taking vehicle to suspension specialist to diagnose that issue in the rear suspension.
 
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