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Tranny temp



they can get that hot easy, all year if driving long enough. 200's not real bad, if it was up around 220 id say get a trans cooler.

or you can get one any ways, they always help lower temps, lower temps = longer tranny life.
 
200 is fine, if your car is stock then you have a 195 thermostat in and your car will operate close to that temp, and the transmission is typically about 10 degrees warmer than the engine. when its 20 or 30 degrees hotter, that's when you start worrying.
 
But if you'd rather see 150-170º temps, install a cooler.


Just note that in the winter, that cooler isnt so good because temps won't get warm enough alot of the time.
 


Yes.

FluidChart.jpg
 
Spot on...30K is about right if you want the tranny to last a long time...200 is too high for longevity and that temp will climb dramatically in very hot weather in stop and go driving....a trans cooler should be mandatory if you want long trouble free transmission service. I run (2) 18,000 GVW coolers in the grille and by passed the radiator cooling about 100,000 miles ago. Trans has 180,000 miles on it now, shifts perfectly, and has had Dexron VI since 80,000 miles..
 
I run a trans cooler, then into the radiator, then back to the trans. Stock 195 stat. Dexron 6. My temps average around 160s in summer and less then 100 in winter. Towing it gets up to 210-220 above 70 mph running unlocked. Around 65 mph the converter can stay locked and runs around 180-190.
 


you did it backwards. should be rad cooler to new tranny cooler, back to the tranny.

your warming the fluid back up by running it back through the rad to the tranny.
 
I actually did it intentionally so the rad would warm the fluid up in the winter. I know it goes against conventional practice but when I had the cooler after the radiator my winter temps would never get above 40 or 50! It just seemed too cold for my liking.
 
ScottyDoggs said:
i guess its good to know it will still benefit you if installed backwards....
Click to expand...

Mines backwards too lol and it works fantastic just never changed it because of the bitter winters lol took it 10 min to get to 78* the other day on my way to work


Sent from my iPhone using Tapatalk
 
Well common practice and OE is to mount cooler after radiator for lower trans temps. The other school of thought is mounting cooler before radiator but you have higher trans temps. The idea being the radiator acts like a thermostat for the trans. In the winter reheating the fluid and in the summer cooling it further.

If I lived in a warm/southern climate I would run the cooler after the radiator for the most efficient heat loss. Reduce temps as much as possible after the radiator.

Since my summers are 80s and winters can be below 0, I run the cooler before to allow the radiator to act as a thermostat.
 


I have run 2 double stack Long/Dana 18,000 GVW coolers outside of the radiator now for 100,000 miles in extreme cold New England with no issues other than about 2-3 miles of driving before the converter locks up and only when the temperature is below 20 degrees. The Long Double stack plate type of coolers use a patented internal design that regulates flow based on the viscosity of the trans fluid allowing less cooling in very low temperatures and when the fluid is cold. I would avoid the much less efficient tube and fin coolers.My trans fluid runs about 110-120 degrees when cold outside and 135-140 degrees on 90 degree days. Good read here:

http://www.transmasterstransmissions.com/transmission.html
 
I'm running a stand alone Explorer trans cooler and I was running in the 210-260 range this summer, now my temps run in the 160-180 range. I live in the south where it was 80 on Thanksgiving day this year and now it's 48 so we have some massive temp swings. I have a little cardboard box I can slip over the cooler if it gets too cold.... Need to automate that into a couple of bypasses or add a thermostat. My trans temp isn't even in the 80's by the time I leave so I'm pretty easy until I get at least to the 150's.

Jeff
 
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