Hopefully, Mike will have some suggestions after he talks to Revmax tomorrow.
You said the top line on the bypass is hot as you would expect since this line is coming from the transmission.
If that line is hot on both in and out to the cooler, then we know you are getting supply flow through the input of the bypass.
I wonder if, for some reason, you may not get good return flow through the cooler and bypass back to the transmission.
I was thinking out loud.
I was trying to find an easy way to verify system flow without disconnecting the return line, losing transmission fluid, and making a big mess.
Maybe use an infrared temperature probe to track the temperature changes through the cooler to the bypass.
Also, If the cooler and bypass are working correctly, I would expect the transmission pan temperature would be lower than the temperature of the top line on the bypass going to the cooler.
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