On my 05 tj, I got into a wreck. Some guy in a honda decided he wanted to run into me from behind. I ended up punching my A/C controls because i was stopped at a light and holding the shifter. The whole assembly cracked so i put a new one it. The point of the story is, Mine is all vacuum. As far as the whole speed of the fan. There is a module next to the blower that went out on mine which controls the speed that I've had to replace.