There are several threads in the DIY section that refer to the carrier bearing. I had a U-joint go bad and had to replace the entire drive shaft. While I was at it , I replaced the flex discs at the same time. Not a difficult job. Not sure about just the carrier bearing.

John

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Certified Registered Nurse Anesthetist (CRNA)
2002 F250 powerstroke with Plantdrive WVO conversion
1983 300SD 190K miles ,sold
2006 E320 CDI