Here are my trans and power steering coolers. The trans cooler came off a parts truck I bought for some parts for my Suburban, and the ps cooler of a 90's Caddy in the junkyard.
The factory tranny lines had been worked and re-worked, so I decided to start over and bought some straight tube and some fittings and bent some new ones. These tuck up close to the block, cross over to the frame near the fuel pump, then follow the contour of the frame towards the radiator support, passing under it near the mount bushing. From there they curve back up and over to the cooler, which is mounted to the Buick Regal radiator support X bracing. Ideally the electric trans temp sensor should be mounted in the pan, but since I didn't have a welder for a bung at home I improvised a little with some old fittings I had on hand. It does the job for now, and I just assume the trans is a few degrees hotter than the gauge reads.
After cleaning thoroughly and repainting it black, the ps cooler was fairly easy to make work. I had to re-bend the factory metal tube to go the direction I needed, but mounting worked out perfect by using the front triangulated brace I made. I trimmed a hole to match the cooler in the bottom of the plastic factory fan shroud so the fan actually sucks air through it. It worked out great for just a few bucks from the junkyard.
