I realize the liquid to metal interface is better for heat transfer but I
think just as important is the temp differential. In the radiator the
200-230 deg trans fluid is transferring heat to a liquid medium at 180-195
deg. In the external cooler the same 200-230 deg trans fluid is exposed to
ambient air temperature which is at least 80-95 deg cooler and a lot more
surface area. I guess the only way to tell which is better would be to
actually measure the trans temp and see. Unfortunately, that is not
something we'll just go out and do in a few minutes. It would be an
interesting experiment though. If I had a temp gauge sending unit in the
trans I'd try this but I don't. Anybody on the list have a trans temp gauge
installed? -Bob
----- Original Message -----
From: "J Forbes" <jforbes@primenet.com>
To: "Old Trucks List" <oletrucks@autox.team.net>
Sent: Friday, April 07, 2000 6:12 PM
Subject: [oletrucks] Radiators and hi-stall converters
>Usually
> external coolers are in front of the radiator, and when the air is
> heated by the tranny cooler, it will be too hot to be able to cool the
> engine any. If it's an internal cooler, the small size of it will still
> be very efficient, since it's in liquid instead of air.
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