Review on Maximize Performance with Hayden Automotive 516 Transmission Cooler by Kham Fisk

For 2007 Suburban with 5.3L engine and 4L60e transmission. Quick install and it made a huge difference! I should have installed that years ago. My transmission was running at around 180-200 degrees depending on the outside temperature and RPM. When towing a trailer and/or driving at 80 mph on a highway with hills, the speed usually went up to around 215, which always made me nervous. Since installing this cooler I haven't seen it go above 140! I'll be towing a heavy camper late next week and it's going to be quite a challenge, but I'm pretty sure it'll stay well under 200 forever for now. As a note - the supplied threaded fitting will not fit a Chevy radiator. I used a harf line cutter and beveling machine to splice stiff metal lines and create a beveled end to prevent leakage. Also included is a 4 foot hose which would not have been enough for my setup unless I bent the hose in a smaller arc than recommended. Go to an auto parts store and buy another 3 or 4 feet of 3/4" hose. Mine needed about 3 feet for inlet and outlet feeds.