I have a 2015 mazda cx5 with six speed automatic transmission. The stock setup has a transmission cooler only in the radiator. That bothers me a bit. Would yall say all cars with automatic transmission need external coolers these days? I know my engine is only a 2.5 liter but south Texas gets really hot in the summer and stop and go traffic can be brutal. Why do you guys think?

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1984 300SD Orient Red/ Palomino
1989 560SEC
2016 Mazda 6 6 speed manual
1995 Ford F-150 reg cab 4.9 5speed manual