Weird noise after tranny cooler install

[strokin&stang'n]

Just installed a derale remote trans cooler on my truck (03' f250). However, now when I put into any gear and start off or slow down to a stop a loud whine comes from underneath the truck right about where the cooler is. The only thing different I did was instead of using their rubber hose, I custom made hard lines about 3' to get to cooler. Could this be where I am getting the noise? Trans shifts smooth and flawless so it ain't that. Also thought would see drop in temps bc of cooler. One day its 110* next its 150* same route same outside temp, driving me crazy. Thanks for help & ideas

[dirtbikeguy2003]

Put the 6.0 cooler in place of your stock one. Makes a huge difference.

[ipz2222]

make sur the meal lines are not touching anything.

[strokin&stang'n]

checked all the lines and they are clear of everything. Don't see putting a 6.0 cooler on since already have this one installed.