Hum and Vib From Rear - Tires, Wheel or Pinion Bearing - JeepForum.com
 
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post #1 of 6 Old 12-07-2010, 05:42 AM Thread Starter
UncleWilson
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Hum and Vib From Rear - Tires, Wheel or Pinion Bearing

I just rotated my tires (5 tire rotation), and Now I hear a wah wah wah with a vibration coming from the rear of the vehicle, but only at +60 mph. There is about a 1 second pause between the wah's. I for sure feel it when on the accelorator or holding constant speed. If I speed up to 70 mph and coast I think the noise goes away, or at least becomes significantly minor. I didn't have this problem prior to the tire rotation. My first inclination is this is a bearing (pinion or wheel). However, the front right tire (now on the left rear) had been driven on for ~250 miles with a slight bit too much toe in. Could it be the tire?


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post #2 of 6 Old 12-07-2010, 05:50 AM
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Originally Posted by UncleWilson View Post
I just rotated my tires (5 tire rotation), and Now I hear a wah wah wah with a vibration coming from the rear of the vehicle, but only at +60 mph. There is about a 1 second pause between the wah's. I for sure feel it when on the accelorator or holding constant speed. If I speed up to 70 mph and coast I think the noise goes away, or at least becomes significantly minor. I didn't have this problem prior to the tire rotation. My first inclination is this is a bearing (pinion or wheel). However, the front right tire (now on the left rear) had been driven on for ~250 miles with a slight bit too much toe in. Could it be the tire?
You rotated the tires then a new vibe popped up. Id say its the tires. Get a road force balance and if it is the tires, itll be fine.
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post #3 of 6 Old 12-07-2010, 10:37 AM Thread Starter
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Originally Posted by fropleyquark View Post
You rotated the tires then a new vibe popped up. Id say its the tires. Get a road force balance and if it is the tires, itll be fine.
Would tires create a vibe only after 60 mph or would it happen before that too?

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post #4 of 6 Old 12-07-2010, 10:44 AM
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The vibe is a resonance frequency thing, your only hitting the right freq near 60MPH, you might get it at other speeds.

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post #5 of 6 Old 12-07-2010, 11:01 AM
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If you had no problem before the roatation then it's the tires.


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post #6 of 6 Old 12-07-2010, 11:04 AM
Fropleyqk
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Originally Posted by UncleWilson View Post
Would tires create a vibe only after 60 mph or would it happen before that too?
In my experience tire vibes happen at specific speeds. Other types of vibes tend to be more constant and or increase with speed.
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pinion bearing diagnosis , tire wear , vibrations , wheel bearing

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