Rapid-Cool™ Transmission Oil Cooler Kit (698) by Hayden®. With Thermal Bypass. Size: 11" x 9 1/2" x 3/4". This premium transmission oil cooler features a unique plate and fin design, which is 33% more efficient than a comparable tube and fin design. Thanks to its patented internal turbulation, the product ensures efficient heat transfer and minimal pressure drop.
I really like the controlled cold oil bypass for letting the cold oil warm up easier. It is perfect when living in a colder climate like Canada. I didn't use the 'through the fins' nylon ties, but made an aluminum channel bracket to hold it out in front of the AC condenser.