It may be something really simple, kinked line, or the flow restricted for some other reason. Or, it may be that the cooler you have just ain't enough to keep up with the heat the trans generates. See if the PCM is even reporting the correct temp, and go from there.

Keep in mind, the temp sensor is AFTER the governor pressure solenoid in the fluid circuit....... So, I would expect that the trans will report a higher temp than what you see coming out of the cooler, or going into it for that matter. Shooting the line right where it exits the trans would likely give you the closest reading to what the PCM *should* report..... But, that's not really a convenient spot either.

 

I will try something tomorrow, I’ve got a few ideas

 

Let us know what ya find.

 

Definitely will do

 

Oh I have a quick question, do you know if the stock sensor has a value like coolant temp or if It just tells the PCM “hey, problem”

 

It has a value

 

Oh cool, so that should be in the OBDII scanner

 

Some scanners can see it some can't

 

@HeyYou the hot line in the trans cooler was about 167F, this being after driving a few miles. The cold side was about 100F

 

Did the trans temp light come on?