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2023 Air Suspension after TSB adjustments

Discussion in '3rd Gen Tundras (2022+)' started by zack191137, Jan 1, 2023.

  1. Jan 1, 2023 at 1:27 AM
    #1
    zack191137

    zack191137 [OP] New Member

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    I got the air suspension adjusted by the dealer per TSB. However, I do have questions:
    1. Is the truck came leveled before adjusted? What is the rear height after adjusting?
    2. How do you like the riding quality? I do feel it gets loose at low speed, but it can be me overthinking.
    3. Does everyone with air suspension have the problem? Especially for 2023. Anyone has the gap in spec(larger than 35mm)
     
  2. Jan 1, 2023 at 2:16 PM
    #2
    Lou1947

    Lou1947 New Member

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    I adjusted my air suspension and my rear height is about 38.5 inches (with truck height in neutral)from ground to rear wheel well lip. I don’t trust my dealer therefore I tackled the adjustment. My truck rides vey smooth and I don’t have any handling issues and no longer hitting the bump stops. Even though my 1794 has self leveling headlights I had to adjust them after the air suspension adjustment.
     
    Krusher22plat likes this.
  3. Jan 1, 2023 at 3:02 PM
    #3
    chastings1954

    chastings1954 New Member

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    How diffcult was this TSB to do? I think my new Capstone will need it as it seems to hit the bumpstops often. No local dealer help here.
     
  4. Jan 2, 2023 at 9:08 AM
    #4
    MJPlat

    MJPlat New Member

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    ryanwgregg likes this.
  5. Jan 3, 2023 at 8:12 PM
    #5
    Dugnor

    Dugnor New Member

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    Having mine done next week during my 5000 mile service.
    Right now my bump stop to axel is measuring at 17mm and feels a little harsh going over minor bumps on the highway. Can't wait to see if there is a difference.
     
  6. Jan 22, 2023 at 7:14 AM
    #6
    Carolina Peej

    Carolina Peej New Member

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    I have adjusted my air suspension sensor arms several times, trying to dial in the exact right setting (targeting between 40mm and 45m from bump stop to frame).

    One issue I continuously run into is about a 15mm difference from one side to the other. Does anyone know if the left and right air bags adjust independently? It seems like if I adjust the one side, both sides go up, and if I decrease the other side, both sides go down.
     
  7. Jan 22, 2023 at 8:41 AM
    #7
    Lou1947

    Lou1947 New Member

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    It took me several tries before getting both sides the same.I adjusted the arms so both rear heights are at 38.5 inches from ground to wheel well. I may mention that both of the adjustments are are not exactly at the same distance from the open slot.
     
  8. Jan 22, 2023 at 9:27 AM
    #8
    Carolina Peej

    Carolina Peej New Member

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    Thanks. Did you have to adjust and drive and continuously repeat the process, or did you dial them in while parked in one session? Also, did you adjust the arms while the vehicle was on, or did you shut off the engine, make adjustments, and restart the engine?

    Thanks for the help here, I've been adjusting the arms all day and can't get both sides even... Passenger side is stubbornly higher than drivers...
     
  9. Jan 22, 2023 at 10:52 AM
    #9
    Lou1947

    Lou1947 New Member

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    I did mine with the engine off. After the adjustment I cycled the suspension from normal to low then high and back to normal.
     
  10. Jan 23, 2023 at 11:29 AM
    #10
    zack191137

    zack191137 [OP] New Member

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    How did you get in to the difference? is it related to cycling the height? My dealer mentioned they are running into issue, but I never run into it when I did it myself.
     
  11. Jan 23, 2023 at 2:03 PM
    #11
    Lou1947

    Lou1947 New Member

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    What issues are they running into? I just loosened the nut and slid the arm up . On one side the arm had to be moved upwards more than the one on the opposite side to achieve the same rear height on each side. It took me about three tries on the one side to get the correct height to correspond with the opposite side.
     
  12. Jan 24, 2023 at 8:24 AM
    #12
    Carolina Peej

    Carolina Peej New Member

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    Just adjusting the arms with engine off, starting engine cycling the level (high, low, high, neutral) the measuring the distance between bump stops and axle. One side is always higher / lower than the other. Shut the engine off, make an adjustment to the arms, seems like both sides move up and down proportionately, even though I'm only adjusting one side. At some point, I run out of adjustment on one side and it seems like the truck stops responding to adjustments. So then I start all over again, drop both arms to the lowest setting, sit the truck down on the bump stops, shut the engine off, make what I think are the most accurate adjustments, start the truck, cycle the heights, and go back under and measure.

    It seems to me like you get one shot to adjust the arms, and the truck doesn't really respond correctly to minor adjustments to one side or the other.

    Currently sitting at about 50mm on drivers side and a little over 40 mm on passenger side...

    Measurements from the ground to the wheel well lip correspond to the 10mm delta, at around 37 3/4" and 38 3/8" on the other.

    That might just have to be close enough... But the Obsessive Compulsive in me is really struggling...
     
  13. Jan 24, 2023 at 8:32 AM
    #13
    Lou1947

    Lou1947 New Member

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    After adjusting drive the truck making right and left turns then drive it in a straight line and and let it come to a stop slowly. Now measure both sides . ( Make sure that the ground is perfectly level) .I adjusted mine by measuring the distance from the ground to the rear wheel arch, much easier than measuring the distance between axle and bump stop. Hope this helps.
     
    Carolina Peej likes this.
  14. Jan 24, 2023 at 9:18 PM
    #14
    zack191137

    zack191137 [OP] New Member

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    My dealer run into the exactly same issue. It didn't happen to me. All I did is set to H then back to N. There is ~ 1/8 difference at the beginning, but it seems goes away with driving.
     
  15. Jan 25, 2023 at 10:24 AM
    #15
    TRD Prologic

    TRD Prologic New Member

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    Hi, new member here. I've got a 23 Capstone that's having the same issue - found out about the TSB-0070-22 bulletin "adjustment" - took it to the dealer, and they "claim" they made the adjustment per the TSB and that the spacing between the bump stop and axle are within spec...35 +/- The problem still persists with the suspension bottoming out. I've showed these forums and comments to the dealer, but they obviously won't make an adjustment based on "user/customer" recommendations...it needs to come from Toyota, and they're concerned if I make the adjustment myself it could void any warranty if any issues arise 20k miles down the road, etc. Has anyone reached out to Toyota Customer Care to discuss the issue, or asked for an updated TSB# since the 2022 TSB # isn't fixing the issue? The dealer is just saying "sorry" and there's nothing else they can do until Toyota comes out with a new "official" adjustment, or recall. Paid $90k for the truck - it's got 600 miles on it and I don't even want to drive it anymore...it's bad. I plan to call Toyota - just curious if anyone else has tried, but hit a dead end?
     
  16. Jan 25, 2023 at 10:33 AM
    #16
    Breathing Borla

    Breathing Borla New Member

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    How did you pay 90k? That’s insane
     
  17. Jan 25, 2023 at 10:46 AM
    #17
    TRD Prologic

    TRD Prologic New Member

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    $80k msrp + $6k dealer markup + shipping..add taxes and it's over 90k I guess. But we all make bad decisions once in a while...
     
  18. Jan 25, 2023 at 11:22 AM
    #18
    Breathing Borla

    Breathing Borla New Member

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    holy moly, That's HD diesel 1 ton pricing, wow.

    Im sure they will fix it, but I would just raise the arms a touch, its not going to void your warranty, thats bullshit
     
  19. Jan 25, 2023 at 7:55 PM
    #19
    zack191137

    zack191137 [OP] New Member

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    Try a different a dealer if that's possible. My dealer has no issue to do it.

    35mm should give you a nice ride. My dealer raise it to ~43mm and I lower it back to 30~35mm as I felt the ride is loose after it.

    I also found to make L/R side height sensor match up helps a lot. Initially, the R side arm is half way from bottom, and L side is 1/8 way. That sets the wheel center to well bottom at 22inch, it bottoms out all the time. I lowered the R side to 1/4 and L stays 1/8, it raised to 22 3/8 inch. The ride is way better, like day and night. I am done with adjusting it even I probably can fine-tune I little.

    My bet is the AVS system take the ride height as one of the inputs to adjust suspension firmness and travel.
     
  20. Jan 25, 2023 at 9:31 PM
    #20
    Dugnor

    Dugnor New Member

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    Mine was at 17mm before I took it in for the TSB, going over minor bumps would set off the collision record on my dashcam. Now at 35mm and the difference is night and day, so much smoother.
     

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