Grasping at straws here...throwing code P0731 which appears to be the bastion of doom. That said, thought I'd at least throw it out there after reading thru other threads. I am only running 33's G2's on my `09 JKU, no gear change. Jeep has been "searching" for gears for about a year, but basically attributed it to all the things done a once: rear main seal, trans flush, RR snorkel w/k&n filter, etc., so didn't put too much thought into it as it was otherwise running well...until yest, when I had to hit brakes hard on freeway, loss of power, went to N, back to drive, and all was normal. Same thing happened on way home (rush hour, not angry driver, well, not this time-rush hour), and tran light came on. Was able to drive 25mi rest of way home, normally, no limp. When I say "searching" for gears, it basically stutters between 2nd-3rd, 4th-5th, but not an actual slip out of gear, or loss of power. So, my underlying question in all this is; would using a flashpaq (or similar) to change shift points (and a cooler) possibly fix my problem...or just rub some dirt on it and walk it off?