RW>> Hmmm. Can't imagine why that would happen unless you got two faulty
 RW>> cables in a row.

 TW> The cable must be getting kinked somehow during instal or it is too
 TW> short and making a sharper curve then designed for,
 TW> With the talk of a Transmission "Swap" I would think the latter.

 RW> I have the same TH350 setup in my Malibu and no problems with
 RW> broken speedo cables. His is an 80, while mine is a 79. The
 RW> difference being that in 1980 they began using lockup torque
 RW> converters in that TH350. Both transmissions are identical except
 RW> for that feature.

it almost sounds to me like there's additional rubbing inside, somewhere, 
which may be wearing the internal jacket causing sharp edges which could be 
catching the cable... could it be that the new cables have been routed
incorrectly which may be adding an additional or more bend than the
original had?

)\/(ark