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Originally Posted by bill murrow
I'm just a shade tree mechanic too, but I beg to differ with you on the balance of the driveshaft, or propeller as the Europeans call it. I am quite certain that every driveshaft must be balanced and have been told and read on this forum as well to make sure you mark the driveshaft before removal. There are no marks on 123s from the factory but the later models are marked.
Am I right experts? 
Cheers,
Bill |
I do not question driveshafts must be balanced. However, the front part of the shaft is of small diameter and is quite symmetrical. It seems unlikely to me that even if it was slightly unbalanced from a casting or machining defect it would affect the balance significantly. The indexing of the tripods is far more important to curbing vibrations, IMHO.
And, BTW, I just installed the 300D front shaft in my 240D to accomodate the 617.952, and aligned the tripods accordingly. I even used old rubber discs that seem to be in good shape. The two pieces of the shaft are from different cars, so we will see how this arrangement lasts.
