Transmission cooler - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 06-23-2006, 01:16 AM   #1
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Default Transmission cooler

From what I have read here the SSEi radiator has both a tranny cooler and oil cooler built in. I also have a external tranny cooler. Does this mean that my tranny fluid is in effect being cooled twice as it circulates through the system? And if so, are there any problems with the tranny fluid being too cool?
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Old 06-23-2006, 01:25 AM   #2
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no transmission fluid being cool is the best thing you can do...and living in florida is not exactly hgood for transmissions, i highly doubt your trans will ever be too cool...just always make sure that fluid stays bright pink....many a trans have died because of people neglecting them in ahot climate
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Old 06-23-2006, 01:28 AM   #3
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also, all radiators have a trans cooler...but having an extra one, i dont think it needs to be hooked up to the radiator any more....it is just makin the radiator work a little harder fo no reason...also, how on earth is it possible to have both hooked up anyways?!?
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Old 06-23-2006, 01:37 AM   #4
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Transmission guy routed the line from the tranny to the radiator and then routed the out line to the external cooler and then back to the tranny.
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Old 06-23-2006, 04:39 AM   #5
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Quote:
Originally Posted by laydbaak
Transmission guy routed the line from the tranny to the radiator and then routed the out line to the external cooler and then back to the tranny.
oh well, its not bad, extra cooling is good in hot climates, espcially if you tow anything...
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Old 06-23-2006, 08:22 AM   #6
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Being a 94, you should have had the extra cooler from the factory.

The typical fluid flow is from the trans to the cooler, then to the radiator and back to the trans.

In cool climates the radiator works as a preheater for the fluid until it'* up to temp. Then it keeps a constant temperature.
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Old 06-23-2006, 08:50 AM   #7
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I'm running NO core in my radiator (it'* bypassed due to trans-death) and a 28000 GVWR cooler up front. No issues in the Oregon winter whatsoever. And it carries a full warranty.
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Old 06-23-2006, 09:03 AM   #8
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Quote:
Originally Posted by willwren
I'm running NO core in my radiator (it'* bypassed due to trans-death) and a 28000 GVWR cooler up front. No issues in the Oregon winter whatsoever. And it carries a full warranty.
And let'* mention that you have a thermo controlled flow going through that cooler. So it bypasses part of the cooler when it'* cold out.
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Old 06-23-2006, 01:03 PM   #9
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Quote:
Originally Posted by laydbaak
Transmission guy routed the line from the tranny to the radiator and then routed the out line to the external cooler and then back to the tranny.
Nice to see you again... I think its been a while

I do not have an SSEi... Just a lowly SE.... I added an RV + 5-7000 Lbs towing... I ran it just like you trans guy ran it, also the same way its ran from the factory... After my drive home today as I had to hook the scantool up to it... I found that the trans was running a nice cool 150F.... Down here in FL keeping the trans cool is important

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Old 06-23-2006, 02:31 PM   #10
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Would adding a fan over the trans cooler add any benefit?
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