I think you might be getting downvoted for using an abbreviation for 'transmission' that also happens to be a homonym for a slur against transgender people. You've written a good, informative comment drawing on your specialist expertise, so it seems a shame to have it lose visibility. You might consider editing to change the word that could be upsetting some people.
To be upset you would have to take it out of the context its presented in, at which point its out of context. Seems like people are trying to be upset, shame on them.
In electronics/electrician-speak, "tranny" is also commonly used to refer to transformers, but I'd never confuse that meaning with the automotive one nor the gender one given the context.
I don't think older automatics are hard to work on (50s-70s era), but I agree that the modern electronic ones are horribly complex.
