Originally Posted by HeyYou

Check valve is in the cooler line, so, really doesn't have much affect on pressure. If it gets clogged, it prevents fluid flowing to the cooler, and the trans overheats. The RE transmissions monitor trans temp, and if it gets too hot, overdrive gets disabled first, if it continues getting hotter, the trans temp light in the dash will come on. 95 and older trucks, trans temp sensor was external, and an option.... so, that particular bit of code wasn't always there.

Originally Posted by Moparite

If you have gauge/s you can test it yourself, I wonder what the line pressure is?
https://atracom.blob.core.windows.ne...0/2000_154.pdf

Originally Posted by HeyYou

The ports won't always have pressure, so, your gauge may not always read the correct temp. There are a variety of ways to handle that, most common, is have the temp probe on the outgoing cooler line. That gives you the best idea of what trans temp really is. Of course, it isn't 100% accurate, tends to read a few degrees low.... Just keep that in mind when you gauge starts approaching 200 degrees.

Originally Posted by Moparite

If you have gauge/s you can test it yourself, I wonder what the line pressure is?
https://atracom.blob.core.windows.ne...0/2000_154.pdf

Originally Posted by AtomicDog

You can change the pan to one with a drain plug pretty cheap - (https://www.amazon.com/Premium-Trans.../dp/B07MXKPY67)

In addition, you can drill your own port in the side of the pan to mount the temperature sender for a trans temp gauge. Just have to make sure the sensor won't hit the valve body..