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Originally Posted by TubbyZ28
Don't forget about the surface emissivity! I've found on my IR gun that shiny or light colored surfaces report incorrect temps. Example being, I'll see 190° on a radiator hose but 130° on a thermostat housing. I guess to readdress the ops question, looks like either way is fine. If you are concerned about it, have a trans temp gauge installed.
Im running mine in series with stock radiator. I have a 160 thermostat and the trans never sees over 180 on the hottest day sitting in traffic or cruising. At the shootout was the firat time iv really hot lapped my car and it also stayed under 180
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The factory radiator ALWAYS needs to be used. Any external cooler needs to be ran "in series". We did numerous tests on coolers years ago. Where they're mounted, their size, design, and how they're ran. After the test results confirmed that the fluid needs to be ran through the radiator to adequately cool it, we changed our warranty policy. Any trans not ran through the radiator would not be covered. a large "stacked plate cooler" is the most efficient. We seen "tube and fin coolers" actually heat the fluid up! The cooler needs to be mounted directly in front of the radiator so it utilizes the fans to pull air through it while it's sitting still. We spent days with different coolers and such with temp gauges on the trans in and out cooler lines.
Frank
What if you used a trans cooler independently that had a fan on it? Looking like I won't be able to use the stock rad so have to have it independant anyway
Making you silky smooth...
It's not about the airflow. The stock fans are more than adequate to pull air through the coolers. It's just that liquid is a better cooling medium than air. If air was sufficient, GM could have saved a bunch of money by not integrating the trans cooler in the radiator.
Frank
I'm not an expert but mine is ran independent, sitting in front of the radiator on the side with the number one fan. 15 mile cruise and 3 back to back passes at the shootout and my trans temp never went above 190 from the best I could tell, (didn't check it at wot). I have a 180° tstat and the fans come on at 205, off at 195. They never shut off at the track so they were moving air across the cooler. I'm running a th350 and a non lockup 3600 stall.
i stand corrected...
I'm going to stand up my radiator and everyone uses the same Griffin radiator without internal cooler. @Cahall says they don't warranty there trans without using a radiator with internal cooler. I'm planning on getting a pro race pretty soon.
Good choice or no?http://img.tapatalk.com/d/13/10/20/8y5ynege.jpg
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The only time you should use a stand alone external cooler is in a dedicated drag car that will never see any street driving.
Frank
This will be a street/strip car. I was going to get the radiator without the cooler until I read your post about testing the trans coolers.
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