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  #71  
Old 01-18-2021, 11:22 PM
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Quote:
Originally Posted by Overboost View Post
As you have it disconnected, move the u-joint through is movement. There was the slightest notch when it got to one point. I MEAN SLIGHT! You could barely feel it but you will notice it.


Yes it goes along the line of trying to test for a loose ball joints in the front suspension you cannot make enough push my hands to compete with natural forces. That little catch Overboost called a notch under no load if you can feel it all you can imagine the amount of force on that drive shaft under load and multiply how much more obvious that little bump will be.


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  #72  
Old 01-18-2021, 11:31 PM
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Originally Posted by andrewwynn View Post
Yes it goes along the line of trying to test for a loose ball joints in the front suspension you cannot make enough push my hands to compete with natural forces. That little catch Overboost called a notch under no load if you can feel it all you can imagine the amount of force on that drive shaft under load and multiply how much more obvious that little bump will be.


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Makes sense. I ran the u joint through all movements and it felt smooth without any resistance even small.
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  #73  
Old 01-19-2021, 11:38 AM
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Originally Posted by Fifty150hs View Post
No UFO noises. That's why I didn't think it would be a wheel bearing. All the reading I've done on it the common denominator with a wheel bearing is the UFO noise. I'm not getting a crunchy noises from my CV joints either so

Do the test I described where you loosen the axle nut, tap the axle in a few mm (leave nut on just loosen a couple turns) and check for play.

My bearing which was silent with 235 tires but howled with 255s was stiff even with rotor on was wobbly even with just the hub once I removed the axle.

That reminds me; usually I can knock out the hub in a minute with a slide hammer but this time it was a beast to remove! It's so much easier to remove with a bearing separator plate and 55-60 mm M14-1.5 bolts.
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  #74  
Old 01-19-2021, 11:50 AM
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Originally Posted by andrewwynn View Post
Do the test I described where you loosen the axle nut, tap the axle in a few mm (leave nut on just loosen a couple turns) and check for play.

My bearing which was silent with 235 tires but howled with 255s was stiff even with rotor on was wobbly even with just the hub once I removed the axle.

That reminds me; usually I can knock out the hub in a minute with a slide hammer but this time it was a beast to remove! It's so much easier to remove with a bearing separator plate and 55-60 mm M14-1.5 bolts.
I'll give this a try. Maybe this weekend. Not sure as it looks like rain moving in again.
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  #75  
Old 01-19-2021, 04:12 PM
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I don't get the shake in the wheel until I get up over about 70 to 75. The wobble feels kind of like the car is moving side to side. It's weird.
Worn sub-frame bushings?
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  #76  
Old 01-19-2021, 04:40 PM
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Worn sub-frame bushings?
Replaced about 9 months/ 7000 miles ago. Better not be it!
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  #77  
Old 01-19-2021, 04:50 PM
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Replaced about 9 months/ 7000 miles ago. Better not be it!
OEM or poly? Correct installation?
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BMW 525IT Sold
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  #78  
Old 01-19-2021, 04:54 PM
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OEM or poly? Correct installation?
OEM. Correct I think. I did it with the correct tool. I will take a look at them.
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  #79  
Old 01-19-2021, 06:07 PM
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OEM. Correct I think. I did it with the correct tool. I will take a look at them.
The OEM has voids in the rubber bushings so it must be installed in a certain wayside so the back and forth movement of the sub-frame is pushing on the rubber and not the void.
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  #80  
Old 01-19-2021, 06:28 PM
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Under load and not a high frequency moan/howl suggests CV axle. Does it change which steering input? Find a hill you can reproduce the sound/vibration and see if you can get it to change by steering pay the centerline.

Did you ever hear small tick tick sounds driving slow? (that's a guibo)

The CV I think it's six bearings so 3/revolution is off by two. If you get a spike at 6x revolution I would expect CV to be the source.

Have you ever had to change boot? Are CV Original (or recently changed)
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