[Mr70]

My information shows the 1969 427/335HP Chevrolet as getting the CQ Suffix.Not the CY.
It states this code for only that L-36 engine.
1968 list shows CE as the trans.for Chevelle-Camaro with an L-78 engine.CL for the 427 Corvette.No CY or CX in 1968.
The CY trans. was avaiable before the CX was in 1969.
The CX was the trans.in the letter dated 7/12/68 in Colvins book.It was used,as the letter states,in 1969 Special Hi-perf Engine Novas,Chevelles,Camaros,Chevrolet,and Corvette.It looks COPO specific and L-72 Impala or Corvette L-71 and up also got it.
I have seen the CX in a 69 COPO chevelle with a 4:10 Posi.I believe it was specific to these rear ratio cars in 1969.

In 1970 the CY was the trans.of choice for the Hi-perf LS-6 engine.All the LS-6 M40 buildsheets have the CY code available with ANY rear ratio.Not just 4:10.Although I think the 1970 Corvette could get the CX still.Any Corvette documentation out there to prove this?


[Edited by mr70 (08-16-2001 at 01:58 PM).]