Piggy

Has anybody installed the Mishimoto transmission oil cooler? I installed the new 70* thermostat. Not towing and at highway speeds tranny temp maintains around 160*F. Stop and go traffic temperature creeps up to 175*F. Towing 5000 Ibs driving in mountains at 82*F outside air temperature, transmission temperature rises to as high as 212*F. Towing 5000Ibs on level highway, 62 mph, outside air temperature 82*F, tranny temp stays at around 175*F. The truck is a 2015 5.3 SLT Terrain with 6L80 with only 38,000 miles, with towing package installed. Tranny fluid and filter was changed at 25,000 miles with fluid exchange machine at dealer and fluid is clean. Apparently the torque converter expands and rubs on its housing, eventually destroying the tranny. I’m thinking by installing the Mishimoto tranny cooler, one is guaranteed that the tranny temperature is always around 160*F and hopefully with changing the tranny fluid often will result in a longer lifespan of the tranny. Obviously the truck is not designed to keep the tranny fluid at 70*C, even with the new thermostat, when towing or city driving. I live in Canada where winters get very cold as well. According to Mishimoto, the tranny temp drops by 37%: https://www.mishimoto.com/engineering/2019/01/chevrolet-silverado-2014-transmission-cooler-rd-pt3?utm_source=silveradosierraforum&utm_term=continue#continue I just installed a mishimoto radiator in my 1986 Mustang GT and their products appear to be good quality . (Although not cheap)

I’m wondering if replacing the lines with aftermarket that seem to be built better such as “Lines to go” found here : https://www.linestogo.com/products.php?product=TCL%2d171%2dSS-Installation-Instructions&showHidden=true it appears from my research on the internet that these GM lines will always fail at the crimp due to the design. Has anyone used the Line to go product? My 2015 truck I can see it’s leaking already and I have 63000 km. I’ve ordered the lower temp thermostat and gasket. I’m thinking of just replacing the lines at the same time. If I use GM oem lines I’m guessing they will just leak again. Apparently the oil lines will leak to eventually but I have to research that as well. Next I’m thinking of the Sonnax Torque Converter and whatever else I need from Sonnax , then catch can, air conditioner modifications before it blows.