check it out, on the left is the little baby stock allison trans cooler, and on the right is a cooler off a 6.0 ford. my trans has always run around 180-190 and since the last rebuild and adding more pressure it was up to 210 one day in town. i dont like that so a friend of mine that works at ford had 2 of these trans coolers laying around and ask me if i wanted to give it a try. ive got to say it made a huge difference. yesterday driving to work in the morning about 70-75 degrees outside usually the trans would get up around 170-180(its mostly 55mph roads), with the new cooler it got to 140 then dropped back to 130. then on the way home it was 92degrees out and in the city and stopping to get fuel and leaving the truck running, it never got over 150 but most of the time was around 140. i hate to say it but maybe the 6.0 fords have 1 good part on them.