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i took mine apart took out the spring and brass holder.put it back together speedo worked ,drove it like this untill i got my ticket,then bought the new transducer to fix the cruise control.
I also posted a concern about mine and got no response. Autozone has them as you say for $60.00. I put some grease in mine when I took it apart and the speedo did not work for a few days and then it started working fine.
If the transducer is bad, it will 'eat' the lower, transducer to transmission cable, but NOT the transducer to speedometer cable. I replaced mine with a rebuilt unit from Auto Parts store, and it was right at $60 exchange.
My current transducer, which can't be more than 3 years old, already broke a lower cable. The last time I had it out, I opened it up, but closed it back up quickly without doing anything to it. I don't know how old the design is, but it made me think of something I might find on a Model T :nonod:
Anyway, it still doesn't hold a set speed very well, but it hasn't broken another cable. Personally, I think I'll just go for another rebuilt one someday.