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Jeffman Jeffman is offline
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Posts: 214
Join Date: Sep 2011
Car: 335xi
Default 07-24-2019, 07:59 PM

Quote:
Originally Posted by type-dRew
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.
Exactly why we need a 160F thermostat in the ATF cooling loop with the engine coolant. When the ATF leaving the AT is <160F the ATF passes through the OEM heat transfer unit (180-200F), but when the ATF leaving the AT is >160F the ATF passes through the trans cooler.


2008 E90 335xi AT 67K MILES
MHD CUSTOM FLEXFUEL 24 PSI, N20 TMAP, FUEL-IT STG 2 LPFP, cPE CHARGE PIPE, HELIX IC, TIAL Q BOV WHITE SPRING, BMS DCI, BMS T-STAT DELETE, BMS HIGH AND MISHIMOTO LOW OCC, RB PCV, KW-V1 COILOVERS, APEX ARC-8, 235/265 MICHELIN PSS, xHP STAGE 3, SCOOPS, PR IGNITION
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