Vibration at about 58 miles an hour


Starsfan79

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My 2001 Wrangler 2.5 SE has a pretty serious vibration at around 58 mph. The steering wheel doesn’t shake so I’m thinking it could possibly be the u-joints. Has anyone else had this issue?
 

Succentor

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Does it go away if you shift to neutral? If not, then definitely tyre balance. As it’s not through the wheel, check the rear first.
 

grabeb

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My 01 TJ Sport has a jerk at about that speed. I'm just starting a thread about that. Shop is saying Tie Rod end on ours. Tire balance was suggested at first! Ours isn't shaking just jerks, like wind blown, so maybe it is the tire,
 

AndyG

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If not the tires, pull the front shaft , drive it, see if it smooths out and get the joints checked while it’s out.
 
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CharlesHS

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I agree with the tire balance....
Take a look at the tires to see if there any rocks stuck in the tire tread or IF there are indications of a missing wheel weight; both can cause the problem you are describing...
 

Jerry Bransford

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Balanced the tires this afternoon and it made zero difference.
I have literally had to have my tires balanced tires 3X in one day at Discount Tire before they finally got them balanced well enough. They spent a long time on the third attempt and they finally nailed it. Not many tire shops give their tire jocks long enough to get them good enough to not cause problems when the tires are big which requires extra time and care.
 
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Jerry Bransford

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A bad u-joint or transmission won't typically cause a speed sensitive (58 mph) shimmy or vibration. A tire is definitely the most likely cause of that.
 

bromel

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It can still be the tires even if they are balanced. I was once sold 4 Goodyears that began shimmying around 60mph despite being balanced time and again. The problem was the tires themselves were irregular--I forget what the technical term was. It took a tech with a road force balancer 30 minutes to finally diagnose the issue, and I was very annoyed to have to replace them with only 30k on the tread.
 
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WallyWest

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I have the same thing, with fairly new tires that don't show any abnormal wear. I've had them balanced by a shop that I trust, and they did take quite a while to do it. Said they got each one as perfect as possible. I tend to believe them, at least I believe they believe it.

Things I've done that made no difference.

2.5" spring lift, new shocks.
New adjustable track bars, front and back.
New rear control arms (MC double adjustable)
ZJ steering upgrade, including drag link and stabilizer.

Now all that put together did reduce the symptoms, but I believe the new joints are just masking it a bit. At it's worst the whole vehicle would shake violently at 60mph or so. Accelerating upwards of 70mph may have helped a bit but it was still there. After all the mods it is almost tolerable, but whatever is causing it is still happening.

The one thing I did that had a noticeable effect was rotate the tires. I did that just before having them balanced. It went from really bad, to just annoying. Balancing may have improved things slightly but not by much. I have to conclude that they aren't perfectly balanced, but my problem is I don't know of any shops around here that specialize in big tires and/or Wranglers. Only thing I have left to replace on the suspension is the front control arms, and I suspect if I did that it would reduce the vibration to a tolerable level. But I'd rather find and fix the root cause.

Other things to check which I have on my list are U-joints and transmission mount. I'm probably going to pull the front driveshaft, and see if that makes a difference. Replace the U-joints while I have it out and then do the same with the rear. That's easy and cheap enough, and needs done anyway. Beyond that I guess it's hunt for a shop that really knows tire balancing.
 

Mudflat

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I have the same thing, with fairly new tires that don't show any abnormal wear. I've had them balanced by a shop that I trust, and they did take quite a while to do it. Said they got each one as perfect as possible. I tend to believe them, at least I believe they believe it.

Things I've done that made no difference.

2.5" spring lift, new shocks.
New adjustable track bars, front and back.
New rear control arms (MC double adjustable)
ZJ steering upgrade, including drag link and stabilizer.

Now all that put together did reduce the symptoms, but I believe the new joints are just masking it a bit. At it's worst the whole vehicle would shake violently at 60mph or so. Accelerating upwards of 70mph may have helped a bit but it was still there. After all the mods it is almost tolerable, but whatever is causing it is still happening.

The one thing I did that had a noticeable effect was rotate the tires. I did that just before having them balanced. It went from really bad, to just annoying. Balancing may have improved things slightly but not by much. I have to conclude that they aren't perfectly balanced, but my problem is I don't know of any shops around here that specialize in big tires and/or Wranglers. Only thing I have left to replace on the suspension is the front control arms, and I suspect if I did that it would reduce the vibration to a tolerable level. But I'd rather find and fix the root cause.

Other things to check which I have on my list are U-joints and transmission mount. I'm probably going to pull the front driveshaft, and see if that makes a difference. Replace the U-joints while I have it out and then do the same with the rear. That's easy and cheap enough, and needs done anyway. Beyond that I guess it's hunt for a shop that really knows tire balancing.
OK. That tells you that your problem lies with the tires. When I bought my TJ last year it came with BFG KO2A/Ts size 33/12.59R15. I still had a nagging vibration after completing front end work & balancing & rotating the tires. The manager at my local 4 Wheel Parts store said that KO2s don’t do well on Wranglers & he refuses to sell them in his store. I thought that was odd considering how many Jeeps I see driving around with them. Since the tires were 5 years old & I was going to replace them next year anyway I changed them out in desperation. I put on a set of Falken Wildpeak A/T3 tires (same size) and it worked! No more vibration.

C04F66A0-F606-4D3B-AEC9-8E0E56B98175.jpeg
 

SPECWAR

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I had a set of BFG’s on one of my F150 4x4’s that would balance out perfectly at my brother-in-laws tire shop, then after I would drive 150-200 miles they would vibrate so bad I couldn’t stand it. After about 4 different rebalances I was able to get them replaced by BFG. Cause, broken belting in the tires.
A vibration at 60-65 mph is 99% of the time caused by a balance issue, period.
 
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