L31MaxExpress
I'm Awesome
Yep! I can confirm both the Trucool 40K and the M7B both work very well with the GM factory Express van orientation. Spare core support I have off a 99 G3500 van I parted out. Factory cooler mounts fittings down, just under the hood latch. M7B is the same width as factory, just taller and thicker with larger fittings. Cruising down the highway at 80 mph on a 100°F day with the in-radiator cooler and the M7B after it, my 4L85E runs about 140°F at the OEM temp sensor that is in the pressure switch pack on the bottom of the valve body. The Tru-Cool 40K was dropping under 100°F on a 40°F day. The M7B stays about 120°F on a 40°F day. Factory cooler was also running about 120-130°F on a 40°F day. I am thinking of putting the 40K back and installing a thermostat in-line with it.Yeah, that's strange. For the same cooler I would trust the factory orientation.
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