Hi Scotty I'm a big fan of yours from Israel so love to see the videos full of your knowledge and funny I checked your channel about a particular question and it seems you have not yet reviewed it I would like if you reviewed or get your opinion about gear oil cooler is it recommended?and if yes for which vehicles are recommended and which one not? Thanks 😊
For what gears?
You probably mean transmission (=gearbox) oil cooler? Most cars have them by default, as part of their main radiator: part of the latter cools not engine coolant, but transmission oil (ATF), and has hoses connecting it with the transmission. In addition to that, some cars have a special design of their underbody / front bumper, which forms a sort of airduct directing incoming air to the atf oil pan (which in this case might even have cooling fins) in order to cool the transmission oil when you are driving fast.
For the transmission to function correctly, oil shall not be cold, but neither shall it become too hot, exceeding, say, 80 degrees centegrade. So if you are thinking about installing an extra atf cooler for your hot climate, some sort of electic valve or thermostate may be desirable, which will only engage this cooling loop when really needed / when the atf really gets too hot. Otherwise you are risking that most of the time your extra cooling will be making your transmission run on too cold atf fluid, which is not desirable, just like too hot fluid is not.
