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Weird vibration noise in '07 Mountaineer

oharris

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City, State
Peyton, CO
Year, Model & Trim Level
'96 & '98 XLT V8, '00 XLS
My daughter's boyfriend's '07 Mountaineer (V8 AWD) has a weird noise/vibration at part throttle. If feels like it is under the driver's feet. I removed the front drive shaft and the noise went away. I found a bit of a catch in one of the caps on the u-joint, so I replaced the u-joint, but it didn't change anything. Any ideas what this might be?

Thanks in advance.
 



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Explorer_PL

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Rockland County, NY
Year, Model & Trim Level
06EB V8
It's either output shaft bearing on the TC or front differential.
 






oharris

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City, State
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'96 & '98 XLT V8, '00 XLS
I let this go for a few weeks and it got bad enough that I can see the problem. It's the pinion bearing on the front diff. Any advice on replacing it?
 






thebrakeman

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City, State
Canton, Michigan
Year, Model & Trim Level
2006 Mercury Mountaineer
We had that vibration (although we felt it under the driver's butt thru the seat). Chased it to the front diff. I can't remember which component was bad in there, but he said it "spun" a bearing.

It's a standard open diff.
 






Explorer_PL

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I had the rear output bearing on my transfer case fail and it was causing humming noise, vibration and TC fluid leak. I checked the prices for a rebuilt TC or get it fixed and it was in 1000-2500 range. I got a used TC from an 07 truck with 47k miles for $ 150 and it's been great since then. I saw the front carriers for about 300-400 price range.
 






pami9899

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I let this go for a few weeks and it got bad enough that I can see the problem. It's the pinion bearing on the front diff. Any advice on replacing it?
did you fix the problem?how did you replace the front pinion bearing?
 






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