I was unable to find any established technical, botanical, or slang definitions for the specific term
: Slang used within a particular hobby or industry? cuke tranny
: A specific nickname for a type of transmission (e.g., a "cuke" shaped or flavored component)? I was unable to find any established technical,
: A shorthand for "cucumber" combined with another process or term? cuke tranny
If you can provide a bit more detail about where you heard the term or what subject it pertains to, I’ll be happy to generate a comprehensive report for you.