Vehicle: Any toyota corolla, yaris, honda fit, civic, after 1995 before 2015.
Transmission: Manual.
Question: Are there stock transmission cooler lines in a manual transmission on these cars?
Doubt any you listed have manual transmission coolers. manuals don't have a torque converter and don't generate as much heat like an automatic, so not needed. Also, there's no pump to move the fluid. So in stock form, no.
I mean… dual clutches tend to have heat exchangers. but, I guess that’s cause of the clutch being suspended in the transmission oil and that’s usually not the case in any manual I can think of. 🧐
Yeah, especially for the years and models the OP asked about.
A lot of times you'll see a radiator designed with trans cooler line fittings used on the manual cars because they couldn't find the correct radiator for the manual trans model.