I recently took my car on a 2 hour drive up the highway w/ the AC on. My temperature was a little higher than normal but it usually is with the AC on. After getting off the highway I turned off the AC to let my coolant cool off a bit. So I am off the highway leaving from a dead stop and it is taking an extremely long time for the transmission to shift. I've had this problem before so I pulled over to check my fluid. While it still had a hint of redness to it there was definitely a hint of brown to the fluid. Let the car sit and cool off for a while and haven't run the AC since and haven't seen any problems with the transmission since. The transmission only has 25k miles since the last rebuild. My transmission guy told me to flush it out and drive it. If its still acting up to bring it to him and he'd rebuild it only charging me for parts. Why do these cars run so damn hot with the AC running? Is there something I can do to combat this? I've also thought about installing an oil cooler, but want something with screw in type fittings...no hose clamps! I'm also wondering if I should run a temp sensor gage. Was just wondering if any of you have run into this problem and what have you done? Sorry for the long read.