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type-dRew type-dRew is offline
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Posts: 3
Join Date: Feb 2019
Car: 2009 335i xDrive
Default 07-24-2019, 08:17 AM

Originally Posted by Streetpro
AT oil heats up by itself very quickly no matter of heat exchanger... the purpose of that heat exchanger is really to combat high temps, not the low ones...
I've ran non-thermostated trans coolers on other vehicles here in Michigan and in the winter i'd be lucky to find 110-120 degrees unless on the road for hours and itll be double digits most of my trip.

There is definitely merit in having a plan to get the fluid to at least a reasonably warm temp somewhat quickly. Or plans to bypass the aftermarket unit and use the stock piece in winter, but thats a hassle.
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