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Old 01-06-2017, 10:59 AM
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Vibration at 65

99 Wrangler 4l auto It is not lifted and I am running stock size tires I get a vibration from 63 to 67 goes away by 70 and can cruise at that speed or higher with out issue. It feels fine at lower speeds as well. I can accelerate threw that range and it is not noticeable but if I hang out at that range or slowly accelerate threw it the vibration develops. . Here is what I have checked or fixed so far.
Alignment
front bearings
tire balance
checked entire front end for looseness
u joints in knuckles
Shocks are questionable I think they would only mask the real problem
I can detect a little play in the front driveshaft slip joint but it is not much
This is not death wobble. I feel it in the wheel mostly
Looking for some gremlins to chase

Thanks Dave

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Old 01-06-2017, 11:06 AM   #2
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How much weight did the tires take to balance? Have you tried rotating the tires front to back to see if the shake goes from the wheel to the seat?

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Old 01-06-2017, 11:09 AM   #3
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Originally Posted by 68charger View Post
99 Wrangler 4l auto It is not lifted and I am running stock size tires I get a vibration from 63 to 67 goes away by 70 and can cruise at that speed or higher with out issue. It feels fine at lower speeds as well. I can accelerate threw that range and it is not noticeable but if I hang out at that range or slowly accelerate threw it the vibration develops. . Here is what I have checked or fixed so far.
Alignment
front bearings
tire balance
checked entire front end for looseness
u joints in knuckles
Shocks are questionable I think they would only mask the real problem
I can detect a little play in the front driveshaft slip joint but it is not much
This is not death wobble. I feel it in the wheel mostly
Looking for some gremlins to chase

Thanks Dave
99% of the time a speed sensitive wobble is tire/wheel related. Either out of balance or defective tire. If you have already had the tires balanced, i would try swapping the front tires for the rear and see if that changes anything. It's not uncommon for guys at tire shops to just get tires balanced to what they think is "close enough". If swapping the tires makes a difference, have them rebalanced.
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Old 01-06-2017, 12:12 PM
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They do not appear to have an abnormal amount of balance weights on them what do you consider a lot? I took it to a 4WD shop near me as I figured they would do a better job then the discount tire place and see or know something I overlooked I explained my problem to them and they agreed that it was probably the balance. They said the balance was a little off so I had high hopes. They also doubled checked the front end and said it was tight. I just did this yesterday and the vibration is just the same. I will swap the tires around and see what happens.
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Old 01-06-2017, 03:14 PM
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Ok swapped front and rear tires. Front end shake is mostly gone. Now it appears I get a shake from the rear but it is less pronounced. I consider the Jeep drivable at highway speeds but it is not as smooth as it should be. The shop agreed to look at it NC. Can you have a bum tire that balance on the machine but picks up a shake on the road? These guys are the go to shop in the area and I figured they deal with trucks and tires all the time. It seams strange that nothing improve after they rebalanced the tire. I am sure the questionable shocks are not helping the overall picture but the wheels should run true. Better shocks would probably mask the problem.
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Old 01-06-2017, 07:08 PM   #6
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Ok apped front and rear tires. Front end shake is mostly gone. Now it appears I get a shake from the rear but it is less pronounced. I consider the Jeep drivable at highway speeds but it is not as smooth as it should be. The shop agreed to look at it NC. Can you have a bum tire that balance on the machine but picks up a shake on the road? These guys are the go to shop in the area and I figured they deal with trucks and tires all the time. It seams strange that nothing improve after they rebalanced the tire. I am sure the questionable shocks are not helping the overall picture but the wheels should run true. Better shocks would probably mask the problem.
My bet is that someone balanced a tire as close as they could get it (without being right on). Sometimes they have to break the tire down and spin it on the rim to get it perfect. The good news is that it sounds like it's likely one of the two that are on the rear.
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Old 01-06-2017, 07:46 PM
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Thanks for all the input
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Old 01-06-2017, 11:41 PM   #8
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Take it to a shop that has a Road Force Balancing Machine, that will find the tire/wheel issue.
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Old 01-14-2017, 10:45 AM
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Turns out they do have a road force machine One of the back tires is way out of spec the others a just a little over. Tires are almost new Goodyear wranglers RTS and were a buying point. Four new tires are not in the budget. Maybe I can find a decent tire to replace the bad one.

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