Noise Months after replacing Center Carrier Bearing on Driveshaft

[nesquil]

In August I replaced my center carrier bearing. I had some noise on acceleration around 20mph and 75mph which went away at 80mph.
I thought this was due to centering the driveshaft/carrier bearing with a cloth tape measure when reinstalling. Also, I didn't replace the gaskets on the two driveshaft's cv joints.

Now, I have a noise which increases all the way from 0.

Is this due to the possibly inaccurate centering? Should I go back under and recenter using some calipers? Is there a way I can check if this noise is due to transmission or differential bushings?

[bmwpower603]

Just had this problem a week ago.

Replaced the differential . Now I can hear front wheels bearings lol

[Silverex]

Maybe the bearing in the rear diff snout?

https://advancedautomotion.com/shop/...io77d2qlk07oh2

[nesquil]

Just had this problem a week ago.

Replaced the differential . Now I can hear front wheels bearings lol

If I get underneath is there a way to diagnose if it's the diff/diff snout?

I jacked up all four corners and all wheel bearings were solid.

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[Bordom]

Pull one side of the driveshaft and inspect the CV itself. It could be dry, or all the grease has been flung out.

[bmwpower603]

If I get underneath is there a way to diagnose if it's the diff/diff snout?

I jacked up all four corners and all wheel bearings were solid.

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Put the car on a lift. And have someone drive the car 65-80 mph while you observe the diff / tran for drivetrain noise

[PwrWgn]

Which center bearing did you use? The 034 bearing is a piece of crap that will probably not last an oil change interval.

[nesquil]

Which center bearing did you use? The 034 bearing is a piece of crap that will probably not last an oil change interval.

Got it from Colorado Driveshaft. It's the most recommended. Might be off center, I used a tape measure instead of calipers.

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[nesquil]

Put the car on a lift. And have someone drive the car 65-80 mph while you observe the diff / tran for drivetrain noise

I only have jackstands but I'll look to see if I can find someone with a lift.

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[q20v]

If you didn’t align the driveshaft 100% I’d say you will feel a vibration rather than hear a noise. Being out of alignment for too long will put excessive load on the bearing and wear it out prematurely though, but if you never felt any vibrations than I doubt it’s the centre driveshaft bearing.

[q20v]

But that doesn’t mean you don’t have a bad (defective) bearing, which can happen sometimes.

[nesquil]

If you didn’t align the driveshaft 100% I’d say you will feel a vibration rather than hear a noise. Being out of alignment for too long will put excessive load on the bearing and wear it out prematurely though, but if you never felt any vibrations than I doubt it’s the centre driveshaft bearing.

There is vibration and it's accompanied by a drone, gets worse as speed increases with a sweet spot being around 80mph.

I tried moving the transmission, and I didn't get any movement or noise. I moved the rear diff and there was slight creaking but not noticable movement. I noticed my inner front driver CV boot is torn. Can this cause the humming noise? I haven't noticed any clicking or popping while driving. The grease is definitely flung all around it. Not sure how long this has been torn.

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[Jakub.J]

Lift sounds logical, I wouldn't drive this thing until you put it on the lift. If that Ujoint fails at 80mph I'd like to see the end result.