Thread: Trans temps
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Old 04-15-2021, 01:38 PM
19963.4lsr5 19963.4lsr5 is offline
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Trans temps

Quote:
Originally Posted by cl4Rk View Post
Interesting. Thanks for the info. Seems odd to me that the FSM would list a temp range for the ATF at a location that’s different from where the thermometer is located (and thus reported by OBDII). I’m not saying you’re wrong, only that it seems odd.

I had always just assumed the OBDII temperature data was the correct data to be used when using the FSM to perform temperature-specific diagnostics and procedures.

I’d love to learn more about this..

Could this be a FSM difference between earlier 3rd gens that don’t report the ATF temperature via OBDII, and later 3rd gens that do?

It makes no sense why they would post an unrealistic temp range. I personally think it more important to see the trans pan oil temp. That is the oil after the cooler and what helps maintain the internal parts temperature. The sensor is sensing the fluid temp as it leaves the torque converter. It is the highest heat load, most variable and the last item in the fluid path before it leaves the trans if I understand the hydraulic schematics correctly.

Unless you’re *****-footing it on flat roads and running in lock up all the time it be tuff seeing the temp at that sensor constantly below 176f.


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Last edited by 19963.4lsr5; 04-15-2021 at 01:40 PM.
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