I have not been under my 123 for some time and was wondering if the propshaft has grease nipples to lub the joints?
No. (Though somebody could have changed the joint for a greasable one in the past. I've never heard of anybody having one.) The center support bearing _can_ be disassembled and greased, but this is not a job for most people as a new bearing is not all that expensive. A cheapskate like myself has done it a couple of times on the jalopies. -- Jim