I have a TJ with 3.07 gear ratio and have been running 33" tyres for two years.
I often hear people say that you lose power with 33's / 3.07.
That hasn't been my experience.
I am not an engineer, so I can't give an explanation, but when I got my 33's fitted I immediately noticed a slight increase in power, which seems to be the opposite to everybody elses experience. Whatever the reason, I'm more than happy with the outcome. Any ideas?
You are misinterpreting what is going on.