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New UCA's and still have some bumpsteer issues

Discussion in 'Suspension' started by Jaywall, Dec 6, 2018.

  1. Dec 6, 2018 at 3:45 PM
    #1
    Jaywall

    Jaywall [OP] 2018 4runner premium

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    3in Toytec lift, uca's, 20 in Ion wheels wrapped in 275-60-20 amp A/T pro
    I love the look of my lift, but today i drove over a speed bump with the left front tire. Whrn my wheel and tire dropped off the speed bump i felt a thud thru the 4runner and had some bump steer
    I had installed the bilstein 3 in lift with 5150's and new UCA'S FROM TOYTEC, from what i have read on this forum its supposed to be a touch stiffer but have a better ride and i thought the UCA's took care of the bumpsteer. Has anyone else had or have this problem?
     
  2. Dec 6, 2018 at 4:18 PM
    #2
    Jaywall

    Jaywall [OP] 2018 4runner premium

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    I do have a drop diff installed but only put front spacers in and not the rear. I listened to a friend of mine about not necessarily needing to put in the rear ones.
    . I had the front end aligned yesterday and the shop said it took them 2 hrs to do it. Not exactly sure of the specs
    Does the drop dif kit make that much difference with this issue? I dont know im just asking.
     
  3. Dec 7, 2018 at 2:28 PM
    #3
    Jaywall

    Jaywall [OP] 2018 4runner premium

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    Im sorry i was mistaken my buddy put all the spacers in but didnt need the longer bolts to put the skid plate back on. Hr did install the front and rear spacers for the 1 in diff drop kit.
     
  4. Dec 7, 2018 at 4:45 PM
    #4
    Dark Knight

    Dark Knight New Member

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    Maybe I’m not reading this correctly but a diff drop has nothing to do with alignment/bump steer. Also please explain your “bump steer” symptoms.
     
  5. Dec 7, 2018 at 5:57 PM
    #5
    Jaywall

    Jaywall [OP] 2018 4runner premium

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    3in Toytec lift, uca's, 20 in Ion wheels wrapped in 275-60-20 amp A/T pro
    Whenever i hit a bump in the road the steering wheel moves left and right a little
     
  6. Dec 7, 2018 at 6:00 PM
    #6
    Jaywall

    Jaywall [OP] 2018 4runner premium

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    3in Toytec lift, uca's, 20 in Ion wheels wrapped in 275-60-20 amp A/T pro
    Uca's are the brand SPC
     
  7. Dec 7, 2018 at 6:18 PM
    #7
    Dark Knight

    Dark Knight New Member

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    oh good, sounds like your car is driving like a car does when it hits a pothole. Hold the steering wheel with both hands. It’s 9 & 3 these days due to the airbag.

    If it’s not swerving you have nothing to worry about. A lifted vehicle will feel slightly different than it did from the factory.
     
  8. Dec 7, 2018 at 6:19 PM
    #8
    Dark Knight

    Dark Knight New Member

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    You may be thinking of the tie rods. Cv axles have nothing to do with steering.
     
  9. Dec 7, 2018 at 6:24 PM
    #9
    Dark Knight

    Dark Knight New Member

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    A cv axle is merely a “floating” object in the geometric equation of alignment/steering. It’s purpose is to place torque on the road to move the vehicle if in 4wd.
     
  10. Dec 7, 2018 at 6:28 PM
    #10
    Jaywall

    Jaywall [OP] 2018 4runner premium

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    [QUOTE="Dark Knight,
    Thanks Dark night for the input. This was my first IFS lift, have always lifted straight axle chevys and they ride crappy anyway, thought maybe it would be different with an IFS suspension.
     
  11. Dec 7, 2018 at 6:30 PM
    #11
    Jaywall

    Jaywall [OP] 2018 4runner premium

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    Thanks for the input fellas i really appreciate it.
     
  12. Dec 9, 2018 at 4:32 PM
    #12
    elnip

    elnip New Member

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    I bet it is more of your alignment shop. I have no bump steer with my SPC's and 5 deg of caster.
    Take a pic of your alignment eccentrics on each side and post.
     
  13. Jan 15, 2019 at 9:57 AM
    #13
    blackoutt

    blackoutt New Member

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    Post spec sheet from alignment, I bet there's still not enough positive caster.
     
  14. Jan 15, 2019 at 12:11 PM
    #14
    Sickboy

    Sickboy New Member

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    I installed the 3” leveling from ToyTec, as well as the diff drop and SPC adjustable control arms and I don’t have that issue. I just had it aligned yesterday. I’m glad I was there because he had the passenger side dialed in and was working on the driver side and I noticed the rectangular washer was not seated inside the indentation on the upper control arm. He had to redo the right side after getting the washer seated properly. I don’t know what the end result would have been with the washer not seated properly but I’m sure they have it there for a reason. You can look at yours with the tires on and see if it’s seated.

    upload_2019-1-15_15-11-35.jpg
     
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