Engine Mods and Tranny Health
07-13-2009, 08:48 PM
#16
Depending on where you plumb it in. And I think you are going to find under normal circumstances, an engine running at 190 will be be transferring heat into the trans fluid that tends to run cooler than that most of the time. Basically the trans is serving as a additional heat sink for the engine. IIRC, there's a valve in the heat exchanger plumbing somewhere that bypasses it under certain circumstances, but I forget how that one works....
IIRC, the fluid-to-fluid cooler is 90% recirc until 140 degrees then 100% is circlated thru the front cooler.
07-14-2009, 12:41 PM
#17
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Correct on the engine-trans-engine thing - shoulda finished the thought with 'and vice versa': when atf is hotter than ECT, the engine absorbs the extra heat - when ECT is hotter than atf temp, the 48RE gets the extra heat - works well in winter climes, where you want the 48RE to be warm and cozy.............
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