Again it seems like a friction issue that shows up with speed. parking brake dragging or a sensor on the brakes coming on when it should not. Since some folks seem to have fixed it with a brake mechanical maybe the tech could check those?
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Not the case for mine. As noted a few times in here, there are possibly two to three different issues being experienced on this thread.Again it seems like a friction issue that shows up with speed. parking brake dragging or a sensor on the brakes coming on when it should not. Since some folks seem to have fixed it with a brake mechanical maybe the tech could check those?
UpdatePurchase date 7/8/24 Vibration/shake since new now 3450 miles
7/15/24 Discount tire Road force toyo - unchanged
7/20/24 Drove with Dealer Tech passenger side worse
Dealer Road Road force toyo - unchanged called Lexus specialist
8/14/24 to 8/26/24 Lexus Specialist
- 2 hours test driving his OT+ then my OT+ with lead dealer tech and myself. Frequency testing in the front seat and back seat. took 8 best toyo tires from both vehicles test drive my OT+ again with Lexus specialist and dealer tech again - unchanged. Lexus tech reset adaptations in computer to see if it improved - unchanged. stated the valving in the OT rear shocks are different than Lux/Prem due to anticipated increased weight allowance for overlanding. Suspects it may be due to Adaptive Shocks but no solution.
Changed toyo tires to Wildpeak AT4 LT - Unchanged...
10/1/24 Unchanged, shaking felt in passenger seat and rear seat mostly, not speed specific, worsens throughout the day all types of asphalt conditions. Attempted to capture on video but iPhone stability image control tends to zero out motion. rigged up a water vessel today to help demonstrate and attached some video.
Fully aware that most don't have this issue and thankful you dont, but for those that do its not practical to even drive. For context I have built and owned dozens of cars including numerous FJ40, FJ60, Tacoma's, 4 runners, GX470's, Ford Super Duty trucks and dozens of tractors/semi's etc etc. (just trying to offer context on the source of the diagnostics only not trying to boast so please understand i've not posted since this thread was on Page 1 trying to have a comprehensive perspective for peoples benefit and help try and narrow this down.) Wescott designs has put on the new King shock/suspension package and curious if they did this to any yet that had the vibration. It took Toyota 2 years to address the Tundra motor. They are dealing with the TX stop sale due to the airbag issue with windows down and now the 23/24 Corolla over brake module issue. My wife daily drives 2020 TRD Pro with 60k miles and just put on the wildpeak AT4's to replace the Nitto's and it drives like butter. I've since parked my GX550 and driving one of my other cars.
This vibration is not related to brake shims or squeaking for those thinking that Sroberts may have been related.
Again i'm just sharing my knowledge of my experience and perspective from research over 3 months. and shout out to TFlyfisher love the graphic!
It is an option and they opened that avenue for me to pursue, however I don’t want to part ways because there’s not a replacement vehicle made that checks all these boxes. It’s amazing except for this one small issue. Sure there are little things they could have. done better like add rear a/c vents in the OT+, more cubby’s for storage etc. the HVAC is poor in my opinion, the awkward transmission clunk when shifting from park but these are all adaptable and easily forgotten about after 3 months. This shake and their blind eye approach to run it down is unacceptable and uncharacteristicly evil behavior of LexusAppreciate the update. What is Lexus’ next step? This sounds like a case where they need to buy the vehicle back from you. I know 2 other members had theirs purchased back. Is that option for you?
Man I feel your pain. I’d be frustrated as heck if I were in your shoes. I’m just praying that when I get my 2025 OT+ that it won’t have this issue. Spoke with my sales rep just last week and she said she hadn’t heard of the vibration issue. My dealership has delivered about 30 OT’s to date. She has heard about the squeaky brakes though.
I’ve been building and revalving (shim stacks) for over 20 years on motorcycle shocks/forks. Done a handful Fox shocks for trucks as well. What your proposing might be true. Have your buddy look at the opposite left side rear in the hopes it’s not bouncing. Swap the two rears and test again. Also, try reaching out Bilstein, Ikon, OME (Old Man Emu). They will have a replacement soon.Update
Today I had my colleague drive along me on the passenger side and observe the tire behavior. We were talking over the phone live. Over a few miles at speeds of 40 on both new smooth pavement and older rougher pavement he indicated it was obvious the right rear tire was bouncing constantly while the right front was smooth as glass.
Looking at the part numbers on lexus parts online for the OT, Luxury, and Premium, they are all different part numbers for the AVS shocks. This leads me to believe the valving is all different in the town tube shocks. The drive mode in directs the ECU to change the ride mode in the AVS shocks from comfort, normal sport, etc.
Based on this information it is my belief that one or all of the following may be causing the bouncing.
Programming is set wrong
Faulty valving in the rear shock(s)
Aggressive valving in the OT for heavier over landing loads causing shock stiffness when roads are not demanding longer travel stroke.
Would love to try sourcing oem rear shocks from the luxury or premium trims to experiment ($571 new) or unplugging the rear electrical connection or just waiting for more aftermarket suspension options available (king, icon, etc.).
Anyone have any suggestions??
Lexus letting us down
My dealer and Lexus corporate is doubling down and saying it’s just that all the OT’s are stiffer for presumed overlanding payloads. I’m seriously considering putting Dobinsons on mine and am in touch with them about it. Also, you may have seen earlier in this thread that I did remove the AVS fuse and also the eKDSS fuse and didn’t see a difference. You also may have seen that I added about 1,000lbs of weight and still noticed it, albeit much better.Update
Today I had my colleague drive along me on the passenger side and observe the tire behavior. We were talking over the phone live. Over a few miles at speeds of 40 on both new smooth pavement and older rougher pavement he indicated it was obvious the right rear tire was bouncing constantly while the right front was smooth as glass.
Looking at the part numbers on lexus parts online for the OT, Luxury, and Premium, they are all different part numbers for the AVS shocks. This leads me to believe the valving is all different in the town tube shocks. The drive mode in directs the ECU to change the ride mode in the AVS shocks from comfort, normal sport, etc.
Based on this information it is my belief that one or all of the following may be causing the bouncing.
Programming is set wrong
Faulty valving in the rear shock(s)
Aggressive valving in the OT for heavier over landing loads causing shock stiffness when roads are not demanding longer travel stroke.
Would love to try sourcing oem rear shocks from the luxury or premium trims to experiment ($571 new) or unplugging the rear electrical connection or just waiting for more aftermarket suspension options available (king, icon, etc.).
Anyone have any suggestions??
Lexus letting us down
It’s likely Lexus / Hitachi Astemo Tokico engineers developed a specific shock for the OT/+ models. If that’s the case, I would consider that a good thing. Did they go too far on initial stiffness? Is it a design defect only affecting a few shocks? Most here It seems are happy with their OT/+ rigs just the way they are. Suspension tuning is a black art and you tune for a certain window which inevitably does not work for some.My dealer and Lexus corporate is doubling down and saying it’s just that all the OT’s are stiffer for presumed overlanding payloads. I’m seriously considering putting Dobinsons on mine and am in touch with them about it. Also, you may have seen earlier in this thread that I did remove the AVS fuse and also the eKDSS fuse and didn’t see a difference. You also may have seen that I added about 1,000lbs of weight and still noticed it, albeit much better.
I’m also looking into putting additional gaskets on my seat mounts until I can get the Dobinsons.
Totally unacceptable that Lexus isn’t doing a damn thing.
The argument that all OT’s are like that for payload is total BS. It is possible to make shocks have a smooth ride zone even if they are stiffer in larger bumps.