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External transmission cooler?

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Old Oct 4, 2025 | 06:42 AM
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Default External transmission cooler?

Hi everyone

Is an external transmission cooler really needed when driving on the road?

Will it add a longer transmission life?

I’m running no A/C and am installing a Champion aluminum radiator.
The transmission is a TH350.

If so, what are good functioning and fitting external coolers for a 1977 C3?

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Old Oct 4, 2025 | 09:22 AM
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Does the radiator include the transmission coolant loop? The generic DeWitts radiators all include the loop (which is pointless for my cars).

If you can use the coolant loop in the radiator, it helps to keep the trans temp in the optimum range.

Here's a recent discussion. I don't know the best way to do it. I'd consider how you use your car, and at what temps, before deciding. At least figure out if you need the bypass.

https://www.corvetteforum.com/forums...on-cooler.html
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