Mike wrote:
>  That was obviously a worn-out or incorrect clamp.  Replacing it is the
> only proper fix. Your 'shim' is not a good idea, but it did work for you.
> That doesn't make it 'right' or even a good idea to recommend to others
> as a good way to make a quick fix.

Well, this was on the car when I bought it and, would you believe, when
I replaced the battery all was well.  The cables and clamps were fine
and of the correct size.  All I can think of is that the DPO must have
honed that one terminal down to undersize.  Who knows?

Mike