Hi,
First, a bearing will usually make a howling noise when moving. Most times, a bad u-joint will cause a vibration or banging sound when you shift into gear.
If you take a look through this link, it explains how to test a universal joint.
https://www.2carpros.com/articles/how-u-joints-work
As far as a carrier bearing, you are more likely to heat it. Also, not always, but most times there will be a leak at the differential seal where the drive shaft and carrier connect.
Let me know if this helps.
Take care,
Joe
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Sunday, April 11th, 2021 AT 8:23 PM