Front Range 4x4 Upcoming Trail Runs - Add a New Trail Run

Results 1 to 13 of 13

Thread: front shimmy at highway speeds, not tires

  1. #1
    Join Date
    Apr 2014
    Member
    #1420
    Last Online
    2 Days Ago
    Location
    Black Hawk, CO
    4x4
    05 4Runner
    Posts
    950
    User Name
    jayson44
    Real Name
    Jay
    Thanks Given
    64
    Thanked 143 Times in 112 Posts

    Default front shimmy at highway speeds, not tires



    my wife's JKU has a slight shimmy at speeds over 60 or so. her tires were really low so I just assumed that was the issue. but today we got brand new 35s installed and on the way home it shimmied again. I was hoping the new tires would solve but dang it, I guess not.

    the shimmy is slight and it doesn't feel like a loose track bar. I'm gonna do a dry turn test later today to make sure, but I've had death wobble in my old TJ, so I know what that feels like. the wheel doesn't turn with the shimmy either...it's more like driving over a washboard road with really little washboards. could shocks do that? stabilizer? again, the steering wheel doesn't turn with the shimmy, it just shakes, so I don't think it's the stabilizer. but the Jeep is almost to 80k miles on the stock suspension. so I'm assuming it's a bushing somewhere.

    it could also be a warped brake rotor...it's been about 35k since I replaced the brake pads and rotors. there's no squealing and the pads look ok, but I'm thinking I'll do that since they're gonna need it anyways. would a rotor make a shimmy like that? it doesn't shake when braking.

    any other ideas I should check?

    J.
    ___________
    05 4Runner Sport - 3" lift, 35s & v8 POWA!
    17 JKU Sport - 2" lift, armor, 35s & v6 SLUGGARY!

  2. #2
    Join Date
    May 2011
    Member
    #834
    Last Online
    1 Hour Ago
    Location
    Colorado Springs
    4x4
    2004 Jeep LJ
    Posts
    1,107
    User Name
    Brian
    Real Name
    Brian
    Thanks Given
    667
    Thanked 352 Times in 250 Posts

    Default Re: front shimmy at highway speeds, not tires



    Front end alignment?

  3. #3
    Join Date
    Sep 2011
    Member
    #921
    Last Online
    10 Hours Ago
    Location
    Fort Collins
    4x4
    1990 Jeep Wrangler (YJ)
    Posts
    8,182
    User Name
    Jim
    Real Name
    Jim Williamson
    Thanks Given
    1,647
    Thanked 2,098 Times in 1,411 Posts

    Default Re: front shimmy at highway speeds, not tires



    left/right shimmy in the steering wheel - rotors would be high on my list

    If you lightly press on the brake pedal when the shimmy is happening - do you feel any slight pulsing?

  4. #4
    Join Date
    Mar 2012
    Member
    #1028
    Last Online
    4 Hours Ago
    Location
    Longmont
    Age
    69
    4x4
    '12 Jeep Wrangler Sport 2.5" lift, 33s, winch
    Posts
    4,067
    User Name
    Tom
    Real Name
    Tom
    Thanks Given
    1,604
    Thanked 846 Times in 624 Posts

    Default Re: front shimmy at highway speeds, not tires



    Tires out of balance or defective e.g. radial belts misaligned in the tires.
    ___________
    Tom
    -.- . - . - -.-

    Life is just better in 4-Low!

    https://m.youtube.com/user/wcrosman/videos

  5. #5
    Join Date
    Apr 2014
    Member
    #1420
    Last Online
    2 Days Ago
    Location
    Black Hawk, CO
    4x4
    05 4Runner
    Posts
    950
    User Name
    jayson44
    Real Name
    Jay
    Thanks Given
    64
    Thanked 143 Times in 112 Posts

    Default Re: front shimmy at highway speeds, not tires



    Brian previously posted:
    "Front end alignment?"

    hmm...duh Jay! yeah I think that will be on the list. haven't gotten it aligned since we put the lift on it almost 4 years ago.

    Jim previously posted:
    "left/right shimmy in the steering wheel - rotors would be high on my list

    If you lightly press on the brake pedal when the shimmy is happening - do you feel any slight pulsing?"

    no pulsing and the steering wheel doesn't actually turn at all. it shakes the whole front of the jeep...you can feel it in the dash and everything.


    Tom previously posted:
    "Tires out of balance or defective e.g. radial belts misaligned in the tires."

    Brand new tires today. still shakes, and it's not any different than it was with the balding KO2s.

    J.
    ___________
    05 4Runner Sport - 3" lift, 35s & v8 POWA!
    17 JKU Sport - 2" lift, armor, 35s & v6 SLUGGARY!

  6. #6
    Join Date
    Mar 2012
    Member
    #1028
    Last Online
    4 Hours Ago
    Location
    Longmont
    Age
    69
    4x4
    '12 Jeep Wrangler Sport 2.5" lift, 33s, winch
    Posts
    4,067
    User Name
    Tom
    Real Name
    Tom
    Thanks Given
    1,604
    Thanked 846 Times in 624 Posts

    Default Re: front shimmy at highway speeds, not tires



    Tom previously posted:
    "Tires out of balance or defective e.g. radial belts misaligned in the tires."

    I have had this this happen on brand new tires that's why I brought it up.
    ___________
    Tom
    -.- . - . - -.-

    Life is just better in 4-Low!

    https://m.youtube.com/user/wcrosman/videos

  7. #7
    Join Date
    Apr 2014
    Member
    #1420
    Last Online
    2 Days Ago
    Location
    Black Hawk, CO
    4x4
    05 4Runner
    Posts
    950
    User Name
    jayson44
    Real Name
    Jay
    Thanks Given
    64
    Thanked 143 Times in 112 Posts

    Default Re: front shimmy at highway speeds, not tires



    Tom previously posted:
    "I have had this this happen on brand new tires that's why I brought it up."

    Yeah, I would think these being bigger would produce a much bigger shake if that were the oddball case. but it feels the exact same.

    J.
    ___________
    05 4Runner Sport - 3" lift, 35s & v8 POWA!
    17 JKU Sport - 2" lift, armor, 35s & v6 SLUGGARY!

  8. #8
    Join Date
    Sep 2011
    Member
    #921
    Last Online
    10 Hours Ago
    Location
    Fort Collins
    4x4
    1990 Jeep Wrangler (YJ)
    Posts
    8,182
    User Name
    Jim
    Real Name
    Jim Williamson
    Thanks Given
    1,647
    Thanked 2,098 Times in 1,411 Posts

    Default Re: front shimmy at highway speeds, not tires



    Correct me if I'm wrong - you had a shake on the old tire set. You changed to new tires - that are bigger (yes?).

    Is the frequency of the shake in line with the rotational frequency of the tires or is the frequency of the shake about 3.5x the frequency of the tire rotation? Is your front driveshaft spinning when the shake happens? ala - is it an off-balance front driveshaft?

  9. The Following Member Says Thanks to Jim For This Post:

    jayson44 (July 23rd, 2020)

  10. #9
    Join Date
    Jun 2011
    Member
    #853
    Last Online
    11 Hours Ago
    Location
    Denver
    4x4
    LJ, Xterra
    Posts
    6,498
    User Name
    Paul
    Real Name
    Paul
    Thanks Given
    1,693
    Thanked 1,423 Times in 996 Posts

    Default Re: front shimmy at highway speeds, not tires



    Sounds like an alignment is in order, but with your mileage and tire size its a good possibility that you're wearing out your tierod and or draglink ends, which are cheap and easy to replace before getting it aligned. Might just be time anyway, cheap insurance.

  11. The Following Member Says Thanks to Paul For This Post:

    jayson44 (July 23rd, 2020)

  12. #10
    Join Date
    Apr 2014
    Member
    #1420
    Last Online
    2 Days Ago
    Location
    Black Hawk, CO
    4x4
    05 4Runner
    Posts
    950
    User Name
    jayson44
    Real Name
    Jay
    Thanks Given
    64
    Thanked 143 Times in 112 Posts

    Default Re: front shimmy at highway speeds, not tires



    Jim previously posted:
    "Correct me if I'm wrong - you had a shake on the old tire set. You changed to new tires - that are bigger (yes?).

    Is the frequency of the shake in line with the rotational frequency of the tires or is the frequency of the shake about 3.5x the frequency of the tire rotation? Is your front driveshaft spinning when the shake happens? ala - is it an off-balance front driveshaft?"

    Yes to your questions, Jim. shake on the old tires, pretty bad really, at speeds over 60. and the new tires are 35s instead of 33s.

    as for the driveshaft, that's actually not a bad thought. we rarely wheel Kayla's Jeep, but we have so there's the possibility that we hit it on something. we did hit up Pickle Gulch just before Father's Day. maybe a scrape put a dent in it? I'll crawl under there and check. I can always disconnect it and see if it goes away, too. thanks!

    J.
    ___________
    05 4Runner Sport - 3" lift, 35s & v8 POWA!
    17 JKU Sport - 2" lift, armor, 35s & v6 SLUGGARY!

  13. #11
    Join Date
    Jun 2015
    Member
    #1730
    Last Online
    1 Week Ago
    Location
    Denver
    Age
    55
    4x4
    84 CJ8
    Posts
    713
    User Name
    Spieg
    Real Name
    Brian
    Thanks Given
    173
    Thanked 149 Times in 130 Posts

    Default Re: front shimmy at highway speeds, not tires



    When you had the new tires mounted, did they inspect the wheels to be sure none are bent?
    ___________
    ~Not All Who Wander Are Lost~ (at least not all the time)

  14. #12
    Join Date
    Apr 2014
    Member
    #1420
    Last Online
    2 Days Ago
    Location
    Black Hawk, CO
    4x4
    05 4Runner
    Posts
    950
    User Name
    jayson44
    Real Name
    Jay
    Thanks Given
    64
    Thanked 143 Times in 112 Posts

    Default Re: front shimmy at highway speeds, not tires



    Spieg previously posted:
    "When you had the new tires mounted, did they inspect the wheels to be sure none are bent?"

    I didn't ask them specifically to do that, but I would assume that if the wheels were bent for whatever reason, they would have let me know.

    J.
    ___________
    05 4Runner Sport - 3" lift, 35s & v8 POWA!
    17 JKU Sport - 2" lift, armor, 35s & v6 SLUGGARY!

  15. #13
    Join Date
    Jul 2011
    Member
    #876
    Last Online
    11 Hours Ago
    Location
    Lakewood, CO
    Age
    59
    4x4
    11 Rubicon Unlimited, 95 YJ, 86 CJ7, 87 Dodge W250
    Posts
    769
    User Name
    ColoJeeper
    Real Name
    Don
    Thanks Given
    12
    Thanked 98 Times in 79 Posts

    Default Re: front shimmy at highway speeds, not tires



    Change the location of the tires and see if the shimmy seems to change. Did with mine and ended up being a bent wheel.
    ___________
    Jeeping:

    The art of getting dirty and going broke while slowly heading nowhere and taking all day to do it...

Similar Threads

  1. Highway of Legends
    By Paul in forum 4x4 Videos & Photos of Interest
    Replies: 1
    Last Post: October 16th, 2017, 12:27 PM
  2. FS: Jeep JK 35" wheels/tires, front driveshafts, RK control arms
    By fredrok in forum For Sale, Wanted, Trade, Free
    Replies: 7
    Last Post: May 21st, 2016, 06:15 PM
  3. better tires up front or rear?
    By 94ToyBear in forum Tech How To
    Replies: 22
    Last Post: March 6th, 2014, 05:44 PM
  4. Replies: 2
    Last Post: February 25th, 2014, 10:40 PM
  5. Shimmy/wobble problems, anyone?
    By Brody in forum 4x4 Videos & Photos of Interest
    Replies: 15
    Last Post: April 9th, 2009, 09:34 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
BACK TO TOP