Hello all! This is a 2007 Pacifica with a 4.0 in it. One of the lines coming from the trans to the cooler has an audible noise coming from it now that did not used to be there. It is only on one of the lines. Chrysler checked fluid level and said it was fine. Any ideas?

 

might be a check valve issue in one of the lines

 

The same issue on my 2007 Pacifica, 62te trans. If I can check valve issue in the line by self, how I can do it?
Thanks.