Guest HALLOWEEN Z Posted August 30, 2010 Share Posted August 30, 2010 I was using one of those tranny coolers from oreillys but have now gotten a stock replacement 3 core datsun radiator instead of the gm radiator I had. Now I have a tranny cooler in the radiator. Will I be fine running the cooler in the radiator? It doesn't get driven hard except very occasionally. It's a 700r4 transmission Quote Link to comment Share on other sites More sharing options...
GLSHLE Posted August 30, 2010 Share Posted August 30, 2010 Why not both? Quote Link to comment Share on other sites More sharing options...
hoov100 Posted August 30, 2010 Share Posted August 30, 2010 Keep the external cooler. Quote Link to comment Share on other sites More sharing options...
Guest HALLOWEEN Z Posted August 30, 2010 Share Posted August 30, 2010 forgot to add that external cooler is in bad shape and needs replaced. Not a problem replacing it just didn't want the extra part if it wasn't necessary. From what I understand cooler isn't always better for transmission oil they have an operating temperature. Ofcourse without a temperature gauge I don't know what its running anyways. Quote Link to comment Share on other sites More sharing options...
emeraldlion Posted August 30, 2010 Share Posted August 30, 2010 Yeah. I would suggest running a cooler. I doubt you're going to run too cool. Quote Link to comment Share on other sites More sharing options...
deja Posted August 30, 2010 Share Posted August 30, 2010 Run them both, you can't get too much cooling for an automatic tranny. The TWF without a cooler is so much higher than with a cooler its shocking its not an OEM part. Quote Link to comment Share on other sites More sharing options...
GLSHLE Posted August 31, 2010 Share Posted August 31, 2010 I am going to run only a tru-cool 4589 24,000 GVW in my 700r4. That much less heat in the Radiator. It's the only cooler I have in my Pathfinder. Quote Link to comment Share on other sites More sharing options...
Brad-ManQ45 Posted September 3, 2010 Share Posted September 3, 2010 I would run both and have the external ahead of the radiator to warm the fluid up faster when cold. If you buy the kind that slows down/bypasses fluid when cool so much the better. Quote Link to comment Share on other sites More sharing options...
hoov100 Posted September 7, 2010 Share Posted September 7, 2010 Don't run the stock internal heat exchanger, it will do nothing but reheat the ATF you are trying to cool down and will cause your coolant temps to rise. Quote Link to comment Share on other sites More sharing options...
jc052685 Posted September 7, 2010 Share Posted September 7, 2010 Don't run the stock internal heat exchanger, it will do nothing but reheat the ATF you are trying to cool down and will cause your coolant temps to rise. Thats why you run it into the radiator first and the external cooler second. BTW your logic in the bold is flawed. Quote Link to comment Share on other sites More sharing options...
hoov100 Posted September 7, 2010 Share Posted September 7, 2010 Thats why you run it into the radiator first and the external cooler second. BTW your logic in the bold is flawed. Yeah, I just realized that. But my point is still that running ATF through a factory heat exchanger and then through a external cooler is useless, as you aren't really cooling the ATF when it goes through the heat exchanger you are merely getting the ATF closer to the water temp (usually heating up the coolant) and it alone has more con's then pro's, especially when mated with an external cooler. Quote Link to comment Share on other sites More sharing options...
ritrebor Posted September 12, 2010 Share Posted September 12, 2010 That's what I did. I ran the line from the trans to the trans-cooler in the radiator than to an external dual pass trans-cooler mounted in front of my radiator than back to the trans. ritrebor Quote Link to comment Share on other sites More sharing options...
leroylucky Posted February 6, 2011 Share Posted February 6, 2011 The JTR kit radiator didn't have connections for the trans. I used an external cooler. I guess the question is. Do in need a radiator with a cooler in it or will be ok? Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted February 7, 2011 Share Posted February 7, 2011 youll generally want to keep trans fluid under 170F , if youve got a trans fluid temp gauge it will help http://forum.grumpysperformance.com/viewtopic.php?f=57&t=176 http://forum.grumpysperformance.com/viewtopic.php?f=71&t=662 Quote Link to comment Share on other sites More sharing options...
Brad-ManQ45 Posted February 18, 2011 Share Posted February 18, 2011 The purpose of running the cooler AHEAD of the radiator exchanger is to lower the temp of the fluid BEFORE hitting the exchanger. Transmissions do not like cold fluid either - they like it heated, so having the cooler ahead of the exchanger allows the exchanger to help heat the fluid to operating temperature. The cooled tranny fluid will not put as much load on the cooling system, thereby increasing IT'S efficiency. Quote Link to comment Share on other sites More sharing options...
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