Speedo Cable Mystery for 1968

Q: Speedo Cable Mystery for 1968

During the course of researching codes for the 1968 Firebird Body Broadcast Sheet, I’ve discovered some mysteries one of which has to do with the Speedo- Cable. I have heard it said that the 1968 Ram Air Firebird used a special, unique Speedo-Cable (per Jim Mattison) but so far, no one (incl. him) has been able to produce and factory documentation proving this. The only proof has been in the Parts Book and that only says the Automatic cars used a special Speedo-Cable.

The other issue is the Two-Piece Speedo Cable and the use of a Speedo-Gear Adaptor. What I’d like to know is which Firebirds used the Two-Piece Speedo Cable and what exactly was a Speedo-Gear Adaptor ? I know it was optional and it even had a sales code (#591) but what required it ?? So, if you have anything to add to this issue, please jump in. I’ll post another message with part numbers for those interested in further details of this mystery.

A: Know the answer? Send the answer to me on this issue.

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