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Passenger seat shaking on highway

Discussion in '5th Gen 4Runners (2010+)' started by Tmiesowicz, Jun 17, 2022.

  1. Jun 17, 2022 at 8:39 AM
    #1
    Tmiesowicz

    Tmiesowicz [OP] New Member

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  2. Jun 17, 2022 at 4:46 PM
    #2
    BionicRandy

    BionicRandy New Member

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    Weird! If you stick a camera on the side of your truck looking at the tires I bet one is jumping around like crazy. That vibration is being transferred in from somewhere. Look there first.
     
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  3. Jun 17, 2022 at 5:13 PM
    #3
    4runGirl88

    4runGirl88 Get a little mud on the tires!

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    I just noticed this as well on mine this AM! I think my tires are not properly balanced.
     
  4. Jun 17, 2022 at 5:15 PM
    #4
    Tmiesowicz

    Tmiesowicz [OP] New Member

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    When I google searched I found a lot on the Tacoma forum about this issue. Just another quirk it seems like. Mine is most certainly worse when towing. When this happens the vehicle feels smooth, not even any steering wheel shimmy.
     
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  5. Jun 17, 2022 at 5:26 PM
    #5
    4runGirl88

    4runGirl88 Get a little mud on the tires!

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    Not towing, but I don't feel anything in the steering wheel either. I'm getting my tires rotated and balanced tomorrow. I'll post if it appears to eliminate the seat shimmy.
     
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  6. Jun 17, 2022 at 6:44 PM
    #6
    Snickel Fritz

    Snickel Fritz Do not develop this member's app

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    Get them Road Force balanced, on a Hunter brand machine, WITH the Toyota hub adapter, and NOT run on the "auto-mode".
    On your way home - and for the first couple of days after mounting - accelerate smooth, drive gently, and keep your speeds as low as you can. This is to avoid slipping the bead, which is lubricated and much more easy to move out of spec until that lube dries.

    After a few years on the forums and reading archives from many other sites, this is the process to most likely ensure a successful balance on these incredibly sensitive vehicles.
    Hope this helps.
     
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  7. Jun 17, 2022 at 7:14 PM
    #7
    4runGirl88

    4runGirl88 Get a little mud on the tires!

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    Does every tire place do a road force balance? I'm ditching the dealership and going to Discount Tire (not sure if they are known across the States as that name). I appreciate the input for sure.
     
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  8. Jun 17, 2022 at 7:21 PM
    #8
    Snickel Fritz

    Snickel Fritz Do not develop this member's app

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    That's the right question- no, many shops do not have a road force balance machine, let alone a Hunter with the correct hub adapter... and even those might not have techs that are willing or able to do the job properly.

    Discount is supposed to have the Hunter machines, but not all of them have the Toyota-specific hub adapter. My advice is to speak with a/the location supervisor, and ask if they are sure that they have the adapter in stock, and if they have a senior tech that can run the machine program with manual inputs.
    If the manager says they can do it, great! If not, ask which location *can*, because it's much less time and effort to do it the "hard way" on the first attempt. Multiple visits to Discount, returned tires and lost business are much less desirable than turning a twenty minute job into a thirty minute job.
     
  9. Jun 17, 2022 at 11:24 PM
    #9
    McSpazatron

    McSpazatron New Member

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    My highlander does the same thing on smooth roads, but with a back seat. That car has always been perfectly balanced, and doesnt suffer from shimmy. The seat bounce/shaking is not a shimmy, it’s not cyclical. It’s a response to bumps. It takes longer to stop shaking than I expected, but does not sustain. These seats are lighter nowadays, thats probably why they move around a bit more.

    I subjected myself to a few questions when I discovered my shaking Highlander seat. Thanks to yous guys:p, I am sure I’ll ask myself these questions again when I look tomorrow to see if my 4runner has the seat shakes :crazy:. I usually apologize for subjecting anyone to my internal thought process, but I hope it helps anyone wanting to tempt fate by having a non-shimmying 4runner rebalanced.

    Q1: When in my life did I previously look at an empty seat beside me while driving…for any length of time…whatsover?. A: Good question, I cannot recall.

    Q2: Why am I currently looking at it? A: Well, it’s shaking, duh

    Q3: Is it loud? No.

    Q4: Is the person sitting in it bothered by it? A: Not really, but that’s only because nobody is in it.

    Q4: Ok then, when somebody is sitting in it, are they bothered? A: No, but that’s only because it’s not shaking.

    Q5: Sigh…. Try moving the seat-back position a little…more vertical. A: That’s not a question.

    Q6: Move the damn seat! A: OK! Jeez, there….. I guess that might be a little better, but Im not sure, I’d have to look at it longer, under more road conditions…

    Q7: Stop looking at the seat and get your eyes on the road. A: That’s not a question either, and you can try to say it more nicely.
     
  10. Jun 17, 2022 at 11:57 PM
    #10
    Slopemaster

    Slopemaster New Member

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    It’s because it’s designed for an occupant to enjoy the adventure with you. ;)
     
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  11. Jun 18, 2022 at 7:59 AM
    #11
    Tmiesowicz

    Tmiesowicz [OP] New Member

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    I will still accept these quirks over electrical, transmission, lifter, head gasket, rear differential, infotainment, and engine failures with ‘other’ company’s.
     
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  12. Jun 18, 2022 at 6:08 PM
    #12
    4runGirl88

    4runGirl88 Get a little mud on the tires!

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    Discount Tire performed a road force balance on my rig (Hunter machine and correct adapter). I haven't had a chance to get her past 45 mph yet which will truly tell me how well balanced they are, but the passenger seat still has a shimmy. Ugh. Guess it wasn't from tires afterall.
     
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  13. Jun 18, 2022 at 6:37 PM
    #13
    Slopemaster

    Slopemaster New Member

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    Seriously, it’s just a tolerance design thing. I brought it up when I purchased my 18’ and we checked several other 4Runners on the lot. All the same.

    My 97’ Tacoma passenger seat did the same thing.
     
  14. Jun 18, 2022 at 6:48 PM
    #14
    SlvrSlug

    SlvrSlug New Member

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    I have gone through this process many times with techs being able to use the equipment correctly, training, training, training. If a tire is a little out of round, or slight defective it usually can be balanced out to an extent. If it’s to far out, then it needs to be replaced, Same with the wheels. I would suggest that you do not accept it as is, ask for their best guy. If he can’t get it done, then be prepared to take it elsewhere. I run 285/70/17 MT’s and go to the same shop for years, sometimes they nail it, other times i take it back and tell them i have a little shake, and i know it not terrible but it drives me crazy. Smooth as glass on the way home. Be persistent you do not have to settle for the way it is. I hope you get it taken care of and it puts a smile on your face, stick to your guns.
     
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  15. Jun 18, 2022 at 8:27 PM
    #15
    McSpazatron

    McSpazatron New Member

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    @4runGirl88 Did you think you had out of balance tires because the seat was shaking, or because you were feeling a vibration (steering wheel, floorboards etc.?

    Can you tell if your seat shakes because of road surface texture or bumps….or is it a constant shake, even in smooth roads?
     
  16. Jun 18, 2022 at 8:45 PM
    #16
    4runGirl88

    4runGirl88 Get a little mud on the tires!

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    I've noticed some vibration when going 50+ mph. I thought it was my right rear tire, and have since had tires rotated and then it appeared to be more in the right front. I only noticed the passenger seat shimmy about a day ago. I was planning to get my tires balanced before I noticed the seat shimmy. Figured the 2 were related. Seat shakes alot over bumps and uneven road. But today I noticed it shimmies constantly. I don't feel the vibration in the floor after today's balance, but I haven't driven 50+ mph yet either.
     
  17. Jun 19, 2022 at 6:56 AM
    #17
    Tmiesowicz

    Tmiesowicz [OP] New Member

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    I notice some vibration in the 2018 F250 I drive at work, as bad as the 4 runner no, but it’s a bench seat and I never have the opportunity to put a trailer on it and go 60mph + so that made me feel better.
     
  18. Jun 19, 2022 at 6:57 AM
    #18
    Tmiesowicz

    Tmiesowicz [OP] New Member

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    Do you experience the steering wheel shimmy around 55-65 mph?
     
  19. Jun 19, 2022 at 9:30 AM
    #19
    4runGirl88

    4runGirl88 Get a little mud on the tires!

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    Steering wheel shimmy is brief at higher speeds. I felt vibration mainly in floor if that makes sense? Like a tire bouncing along.
     
  20. Jun 19, 2022 at 9:39 AM
    #20
    4runGirl88

    4runGirl88 Get a little mud on the tires!

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  21. Jun 19, 2022 at 9:45 AM
    #21
    Tmiesowicz

    Tmiesowicz [OP] New Member

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    You are another blessed with that I see, maybe the vibration you feel in the floor is the needle bearing, I felt a rotational vibration in the floor and could also hear it and feel that in the steering wheel as well.
     
  22. Jun 19, 2022 at 6:18 PM
    #22
    OverRunner

    OverRunner New Member

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    I only experience the seat shaking when the seat is pushed all the way back and nobody is sitting in it. The way I understood it, there is way too much of the seat behind the mounting points when it’s slid all the way back. With a passenger, their weight holds the seat still. I actually read about the issue before I ever experienced it (I have a small fiancé, so the seat is only ever that far back after I sit over there, or after cleaning). When I did experience it, it was as simple as reaching over and sliding the seat forward, and that was all she wrote. Hope others experience the same easy solution.
     
  23. Jun 19, 2022 at 9:00 PM
    #23
    DallasTRDPro

    DallasTRDPro New Member

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    Wow I found some people more anal than me. Thankfully y'all exist. I don't think I have passenger seat shake and I'm not going to look, but I get it because when I was looking for another 4R I chose the SR5P over other models because I hated seeing the transfer case shifter shake on my Pro.
     
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  24. Jun 19, 2022 at 9:30 PM
    #24
    McSpazatron

    McSpazatron New Member

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    LOL! I also enjoy knowing I’m not the only one “blessed” with an attention to detail…as annoying as that can be.

    Somebody quoted that thread with the idea to slide the seat forward. I think that might be the silver bullet.
     
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  25. Jun 19, 2022 at 10:57 PM
    #25
    DallasTRDPro

    DallasTRDPro New Member

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    Well as far as that suggestion goes, I will say that I remember on my Pro I had a rattle in my drivers seat. One small pulse of the electric seat control and the rattle went away so adjusting the passenger seat might be the solution.
     
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  26. Jun 29, 2022 at 6:14 PM
    #26
    brownersd

    brownersd You are the weakest link, buh-bye!

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    So, i'll go ahead and chime in on this... As silly as it may sound, i just had an alignment done at my dealership after adjusting my settings on my Eibach suspension, and after the alignment, i stopped getting the passenger seat shake. Turns out that somehow, my toe-in on my passenger wheel was off. (-0.37). They adjusted it back to (0.14), and even the truck drives better. No longer getting the shake as well. Your mileage may vary! :)

    Cheers,

    Sean
     
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