Re: '69 Turbo 400 code?
William,
The casting number on my CY coded 400 is 8623462, the short tail housing is 8624486.
Stan, I still believe the Transmission Identification sheet of 7-12-68 is for the CY code transmission as they came before the CX. Could the X on this document be the reason you think it is for the CX? The Gibb cars were built with a redesigned Turbo 400 for racing purposes. These first redesigned 400's were called experimental automatics (X). These transmissions are believed to be the first automatics built for Chevrolet with a high horsepower, solid lifter engine. According to documents I have, 39 pages of Hydramatic Production Parts list, the CX code was added on 10-25-68, meaning they were built for 69 cars. Would Turbohydramtic have issued this letter this far in advance on building the CX? If any of you have the November 1968 issue of Popular Hot Rodding and the article about the Harrell Novas, notice in this article they refer to the experimental transmission as 69's, however, we now know the Gibb cars were built on the tail end of 68 with these transmissions as a COPO Nova, which was never mentioned in the article. Both the Cy and CX coded transmissions shared likness in that they were built for high performance applications in 68 & 69, L-78's, L-72's, etc. Could some of the extra experimental transmissions have been built for Gibb, or someone else? Since Mark Fuss has a Harrell Nova that is an automatic, Which is not one of the 50 Gibb COPO's, but could Harrell have built his car with one of these? His Nova supports an L-88 engine. How many other Experimental Automatics could have been built for warranty? There are all kinds of questions that are still unanswered?
Ray
|