Cat 980G-coolant in transmission

I have a 980G that has been getting lots of coolant in the transmission after starting it this spring. I have a new trans cooler on the way. I removed the cooler today and pressure tested it-more to see where it was leaking than anything else.
Anyway to cut a long story short it looks like the cooler is not leaking,(pressurised it to 30 psi). Can anyone tell me if there is anywhere else that the coolant can get into the trans oil?

Cat 980G-coolant in transmission