Importance of AT heat exchanger in radiator
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Joined: Aug 2012
Posts: 3,070
From: Southern New Hampshire
Well, currently, at Maine winter temps, I start my truck and drive right off. No unpleasant shifting that I can detect...and, this is with the "old style" ATF-through-radiator which means my ATF is cold until the radiator comes to engine temperature.
Maybe newer, or higher-performance, transmissions have tighter tolerances for ATF temperature.
Maybe newer, or higher-performance, transmissions have tighter tolerances for ATF temperature.
Regarding newer transmissions, yeah, the new six, seven, eight, nine, and now ten speed automatics have been plagued with complaints of harsh shifting when cold.
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Member
Joined: Nov 2008
Posts: 155
From: Greenville, Maine
More for the sake of interest, than to generate data needed to make this decision, I think I will eventually get around to doing a quickie temperature study. Take the temperature of the bottom of the radiator and the ATF leaving the transmission every five minutes (or so) for 20 or 30 minutes of driving.
Super Moderator
Joined: Aug 2012
Posts: 3,070
From: Southern New Hampshire
That is where I am leaning, too.
More for the sake of interest, than to generate data needed to make this decision, I think I will eventually get around to doing a quickie temperature study. Take the temperature of the bottom of the radiator and the ATF leaving the transmission every five minutes (or so) for 20 or 30 minutes of driving.
More for the sake of interest, than to generate data needed to make this decision, I think I will eventually get around to doing a quickie temperature study. Take the temperature of the bottom of the radiator and the ATF leaving the transmission every five minutes (or so) for 20 or 30 minutes of driving.
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