Eaton super ten Transmision

Hey guys I was wondering if I can get a little help. I have a super ten transmission that’s making a whining noise When the shifter stick is to the right which means it’s in high gears . Does it when truck is off and on. It’s air related because it drains air when it’s making the noise . I followed air lines to the back of tranny and goes to this valve where the filter filter regulator sits on top I beleive it’s called the range cylinder . Anybody knows what’s going on . It sure if it’s coming from range cylinder valve or the filter