1979 240D

I drug home the $500 beater - named the Marmot

I got it running really well - new nozzles etc. But I started to get a NASTY howl from the drive train.

At first I though - bad half shafts - but they seem to be in good condition - though the boots are tired.

Then I thought wheel bearing - I pulled one last night - it wasn't dry. It still had plenty of clean grease in the cavity between the bearings. I repacked anyway and re-installed (what a pita!)

Then while installing the new flex joint - I began wondering if it could be the carrier bearing.

How do I test the carrier bearing?

BTW - the car does not make the howling sound with the rear wheels in the air. It seems it only has issues with the weight of the car on it. I would have sworn it was a bearing - but doesn't seem to be the case.