The Maxi-Cool Jr. enlisted to cool the 4L80E is a pretty serious piece. Its factory fitted with AN-6 hose ends and incorporates a slick electric fan to keep a healthy supply of air flowing through the core. Space constraints pretty much forced us to mount it directly in front of the oil cooler. Not optimal, but the Perma-Cool techs thought the stacked coolers wouldnt pose any problem. The Maxi-Cool weighs more than a typical cooler, due to its tough construction and electric fan, and bracketry isnt furnished. We cut and bent some 1/16-inchthick steel strap, and drilled holes for nuts and bolts to sandwich the cooler ends between the straps.