If you are driving a car with an automatic transmission and the ATF fluid has the wrong viscosity, what will you be able to notice from the driver's seat? Please reply for any cases you have knowledge of. Obviously, the two cases are in which the viscosity is (1) too low and (2) too high.
Please don't warn me (or readers) to use non-oem fluid. Viscosities lower with time, climate, and other factors anyways, so it's not even a correct answer, let alone relevant to my actual question. If you absolutely are unable to answer the q but feel a need to post, or you must know of why I'm even asking, feel free to pretend you took your car in to a shade-tree mechanic to do a transmission flush and you wanted to know if he or she used the wrong fluid or not and what exactly was really wrong and how it could be fixed without necessarily needing to buy the OEM fluid.
Please don't warn me (or readers) to use non-oem fluid. Viscosities lower with time, climate, and other factors anyways, so it's not even a correct answer, let alone relevant to my actual question. If you absolutely are unable to answer the q but feel a need to post, or you must know of why I'm even asking, feel free to pretend you took your car in to a shade-tree mechanic to do a transmission flush and you wanted to know if he or she used the wrong fluid or not and what exactly was really wrong and how it could be fixed without necessarily needing to buy the OEM fluid.