My dodge journey 2013 has a temperature gauge for transmission that is 140 degrees if it's right in the middle of the gauge.
For almost a whole time i've had it's always run at 140 or under.
Recently, I noticed it running up to 170 degrees, which is about three quarters of the way up the the electronic temperature gauge.
I am not short on fluid, and I believe it was topped off Just recently when I had an oil change.
So unless i'm running bad fluid and I don't kown it I don't understand why it suddenly jumping up thirty degrees.