color coded trans fluid life chart vs temp?

[upjeeper]

i spent a lot of time doing research on bobistheoilguy.com and auto-rx.com a few weeks ago and one of the web sites i came across had a color coded chart of what happens to your ATF at rising temperatures. For the life of me I can't find it now, does anyone happen to know where it's at?

thanks
nate

 

[Kestas]

I don't have the chart, but this was posted a long time ago on this site.

Temp...Life
175....100K
195.....50K
220.....25K (common operating temp for most vehicles)
240.....10K
260......5K
300......1K

Oh, and

 

[1040 WreckerMan]

TCI transmissions had a chart like that. Not sure what TCI's website is, probably find it with a search easy. Cooler is better when ATF is concerned. For long fluid and component life try to keep the ATF between 100-190*F.

 

[unDummy]

http://www.txchange.com/heatchrt.jpg
http://www.perma-cool.com/Catalog/CatImages/PG02-R1.gif
http://www.tciauto.com/tech_info/images/trans_life_expectancy.jpg

 

[upjeeper]

that's it, thanks!

 

[mechtech2]

Since the tranny fluid is 'cooled' by the radiator, which is around 195 deg F, you can be pretty sure it runs hotter than that.
An aftermarket tranny cooler is pretty cheap, and helps a lot. Put it in series after the stock cooler.

 

[1040 WreckerMan]

That's not necessarily true. The coolant maybe 195*F, however the ATF maybe less. My Ranger runs about 195-205*F, but the ATF in sump stays around 170*F as long as it runs in lockup for a good portion of the time. This has no air-to-oil cooler, only the oil-to-water cooler. Also, the ATF cooler is usually in coolest part of the radiator and the engine temp is taken on the engine outlet, or the hottest coolant.

 

[upjeeper]

how is the atf routed? trans to cooler to pan to pump to trans? that makes a different where you put your temp gauge. you'll want it at the hottest point

 

[1040 WreckerMan]

Typically the ATF leaves the converter and goes out to cooler then back to tail housing as lube oil and then back into the pan. You want the temp sender in the pan, as sump temp is what the pump and clutches are going to see. Fluid leaving the torque converter can be 300*F and regardless of what kind of coolers you have you can’t affect that temperature much. The only time the hottest fluid temp is of any value is if you have a temp sender in the cooler out line and one in the sump, that will tell you how effective the heat exchangers are.

 

[gtx510]

Most temp gauge mounting kits put the sensor in a cooler hose.
Why not just mount it in the hose going to the cooler?


Regarding the charts. Where do you think they put the sensor?