Quote:
Originally Posted by RGene7001
I use nothing.
Transmission temperature is monitored by vehicle computer unless this is a very old model. In the worse car scenario there should be warning on the screen or limp mode engaged.
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The problem is by the time the idiot light is turned on in the truck/car it will be too late to prevent the transmission oil from being damage from heat. The ECM will not protect the transmission since the oil is all ready damage.
I have seen when not towing a high of 230F reading on my transmission gauge for the transmission oil. This occurred doing low speed driving on the Needles highway (87) in SD. I was using the engine exhaust brake and transmission to maintain the Highway speed as we descended the mountain trying not to use the service brakes; so when I need them they would be available to use. So to me the transmission oil gauge is very important as are other gauges that I have added. With an accurate gage you can take preventive action to prevent either further damage or prevent damage to a major component.
When we got home the transmission oil and both of the filters were changed along with the install of a AL MAG-HYTEC pan and the additional amount of 2-1/2 quart oil capacity.
Now when towing I normally see 180F maximum temperature in the transmission oil.
A retired machine design engineer who does not believe in IDIOT lights.
Jim W.