there putting in a different valve body in the transmission. I had requested that they put a shift kit in it, but he said that this was better, and he highly reccommended it. he said it has the same effect as a shift kit minus the different gaskets. yes there going to install a tranny cooler down the road. this rebuild has me really strapped for cash. i'm looking at one online for around $50. he said that they would install it for free, since i'm already having them do a ton of work on my car.