transmissionsf
Transmissionsf is a term that appears to be a typographical error or a portmanteau without a widely recognized or established meaning in standard English or technical terminology. It is not a recognized word in dictionaries or a common technical term in fields like automotive engineering, computer science, or telecommunications, where "transmission" is a frequent component.
If "transmissionsf" was encountered in a specific context, its meaning would likely depend heavily on that context.